RL78/F25

Features

Key Features
- RL78 core, Max. 40MHz
- 512KB Flash
- 40KB RAM
- 12-bit A/D converter
- 8-bit D/A converter
- Comparator with 4-fold multiplexer
- Motor control: DC and BLDC - Field-oriented Control (FOC)
- Application accelerator unit
- Optimized DC/DC converter support
- Super-low power consumption
State-of-the-Art Interfaces
- CAN/CAN FD x 2ch, LIN x 3ch, UART, SPI, I²C, SENT
- Capacitive sensing unit (Max. 31ch)
- 20 x PWM output
Support for FuSa and Security
- Security module with EVITA-Light support
- ISO 26262 ASIL B
AUTOSAR MCAL
- QINeS-Lite (manufactured by FPT Automotive): AUTOSAR MCAL (ASIL B) support
Extensive ecosystem supporting the latest standards concerning tool, hardware, and software areas

Find Other Products in RL78 Low-Power 8 & 16-Bit MCUs

RL78/F25 Block Diagram

Description

The RL78/F25 next-generation super-low power automotive microcontrollers are ideal for realizing future highly reliable smart actuators and sensors, as well as low-end body electronic control units (ECUs). As an innovative prolongation of the known RL78/F1x MCUs, the RL78/F25 can cover prospective market requirements. With its increased CPU performance, high-temperature capability, and enhanced peripheral feature set, the RL78/F25 is a perfect fit for various applications.

RL78/F2x products are designed according to ISO 26262 and support functional safety (FuSa) up to ASIL B. Additionally, partner-provided AUTOSAR MCAL (ASIL B) is also available. RL78/F2x products support up to the EVITA-Light security standard or more. An AES crypto module can handle key lengths of up to 256 bits and supports secure boot and authentication. To further boost the calculation performance for BLDC field-oriented control (FOC) motor control and DC/DC control systems, RL78/F2x is equipped with the unique application accelerator IP to offload complex trigonometric and arithmetic processing. The RL78/F25 is also the first capacitive touch sensing unit (CTSU2SLa) in the RL78 automotive product.

To respond to the E/E automotive architecture trend, the RL78/F25 is equipped with a CAN FD interface (2ch). RL78/F2x MCUs are fully hardware and software compatible with RL78/F1x, enabling software reuse.

Parameters

Attributes	Value
Program Memory (KB)	512
Data Flash (KB)	16
RAM (KB)	40
Carrier Type	Full Carton (Tray), Full Tray (Tray), Tape & Reel
Supply Voltage (V)	2.7 - 5.5
I/O Ports	36, 50, 66, 84
Temp. Range (°C)	Ta = -40 to +105, Ta = -40 to +125
Operating Freq (Max) (MHz)	40
USB FS (host ch/device ch)	( 0 / 0 )
SCI or UART (ch)	4
SPI (ch)	4
I2C (#)	4
CAN (ch)	0
CAN-FD (ch)	2
Wireless	No
LIN (#)	3
16-Bit Timer (ch) (#)	19
12-Bit A/D Converter (ch)	17, 22, 23, 29
10-Bit A/D Converter (ch)	0
24-Bit Sigma-Delta A/D Converter (ch)	0
12-Bit D/A Converter (ch)	0
10-Bit D/A Converter (ch) (#)	0
8-Bit D/A Converter (ch)	1
Capacitive Touch Sensing Unit (ch)	15, 23, 31
Segment LCD Controller	No
Security & Encryption	Secure Boot, AES, TRNG

Package Options

Pkg. Type	Pkg. Dimensions (mm)	Lead Count (#)	Pitch (mm)
LFQFP	7 x 7 x 1.6	48	0.5
LFQFP	10 x 10 x 1.6	64	0.5
LFQFP	12 x 12 x 1.6	80	0.5
LFQFP	14 x 14 x 1.6	100	0.5

Product Comparison

	RL78/F25	RL78/F24
Operating Freq (Max) (MHz)	40	40
Program Memory (KB)	512	256
RAM (KB)	40	24
CAN-FD (ch)	2	1
Capacitive Touch Sensing Unit (ch)	15, 23, 31	0

Application Block Diagrams

	Advanced Seat Controller A compact automotive seat-control design enabling smooth, efficient seat adjustment with precise motor control and built‑in protection.
	Hands-Off Detection (HOD) & Steering Switch System Autonomous driving steering system featuring hands-off detection, heating, and touch interaction.

Additional Applications

Smart actuators
Sensors ECUs
Low-end body

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Part Number	Status	Samples	Stock	Package	Budgetary Price (USD)	Carrier Type	Family Name	Series Name	Group Name	CPU Architecture	Main CPU	Sub CPU	Floating Point Unit	Bit Length	Program Memory (KB)	Data Flash (KB)	RAM (KB)	ECC SRAM	Lead Count (#)	Pitch (mm)	Pkg. Dimensions (mm)	Number of Supply Voltage(s) (#)	Supply Voltage (V)	I/O Ports	DMAC or DTC	Power-On Reset	Watchdog Timer (ch)	External Memory Bus (bit)	DRAM I/F	3D GPU	Accelerator	MOQ	Temp. Range (°C)	External Interrupt Pins (#)	LVD or PVD	Operating Freq (Max) (MHz)	Sub-clock (32.768 kHz)	On-chip Oscillator	Ethernet speed	USB FS (host ch/device ch)	USB HS (host ch/device ch)	USB SS (host ch/device ch)	PCI Express (generation and ch)	SCI or UART (ch)	SPI (ch)	I2C (#)	CAN-FD (ch)	Wireless	IrDA	LIN (#)	High Resolution Output Timer	PWM Output (pin#)	16-Bit Timer (ch) (#)	Standby operable timer	Asynchronous General Purpose Timer / Interval Timer (ch)	RTC	12-Bit A/D Converter (ch)	8-Bit D/A Converter (ch)	Analog Comparator (ch)	Capacitive Touch Sensing Unit (ch)	Graphics LCD Controller	Camera I/F (Parallel)	Image Codec	2D Drawing Engine	Segment LCD Controller	Security & Encryption	Debug Interface	Moisture Sensitivity Level (MSL)	Country of Assembly	Country of Wafer Fabrication
R7F125FGL3AFB-C#BA0	Active	N/A	Out of Stock	LFQFP	1ku \| $2.88	Full Carton (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	48#	0.5mm	7 x 7 x 1.6	1#	2.7 - 5.5	36	DTC	Yes	1	No	No	No	No	2000	Ta = -40 to +105	15#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	17	1	1	15	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FGL3AFB-C#HA0	Active	N/A	Out of Stock	LFQFP	1ku \| $2.88	Tape & Reel	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	48#	0.5mm	7 x 7 x 1.6	1#	2.7 - 5.5	36	DTC	Yes	1	No	No	No	No	2000	Ta = -40 to +105	15#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	17	1	1	15	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FGL3AFB-C#UA0	Active	N/A	Out of Stock	LFQFP	1ku \| $2.88	Full Tray (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	48#	0.5mm	7 x 7 x 1.6	1#	2.7 - 5.5	36	DTC	Yes	1	No	No	No	No	250	Ta = -40 to +105	15#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	17	1	1	15	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FGL4AFB-C#BA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.08	Full Carton (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	48#	0.5mm	7 x 7 x 1.6	1#	2.7 - 5.5	36	DTC	Yes	1	No	No	No	No	2000	Ta = -40 to +125	15#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	17	1	1	15	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FGL4AFB-C#HA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.08	Tape & Reel	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	48#	0.5mm	7 x 7 x 1.6	1#	2.7 - 5.5	36	DTC	Yes	1	No	No	No	No	2000	Ta = -40 to +125	15#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	17	1	1	15	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FGL4AFB-C#UA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.08	Full Tray (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	48#	0.5mm	7 x 7 x 1.6	1#	2.7 - 5.5	36	DTC	Yes	1	No	No	No	No	250	Ta = -40 to +125	15#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	17	1	1	15	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FLL3AFB-C#BA0	Active	N/A	Out of Stock	LFQFP	1ku \| $2.96	Full Carton (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	64#	0.5mm	10 x 10 x 1.6	1#	2.7 - 5.5	50	DTC	Yes	1	No	No	No	No	1280	Ta = -40 to +105	16#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	22	1	1	23	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FLL3AFB-C#HA0	Active	N/A	Out of Stock	LFQFP	1ku \| $2.96	Tape & Reel	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	64#	0.5mm	10 x 10 x 1.6	1#	2.7 - 5.5	50	DTC	Yes	1	No	No	No	No	1000	Ta = -40 to +105	16#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	22	1	1	23	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FLL3AFB-C#UA0	Active	N/A	Out of Stock	LFQFP	1ku \| $2.96	Full Tray (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	64#	0.5mm	10 x 10 x 1.6	1#	2.7 - 5.5	50	DTC	Yes	1	No	No	No	No	160	Ta = -40 to +105	16#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	22	1	1	23	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FLL4AFB-C#BA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.17	Full Carton (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	64#	0.5mm	10 x 10 x 1.6	1#	2.7 - 5.5	50	DTC	Yes	1	No	No	No	No	1280	Ta = -40 to +125	16#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	22	1	1	23	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FLL4AFB-C#HA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.17	Tape & Reel	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	64#	0.5mm	10 x 10 x 1.6	1#	2.7 - 5.5	50	DTC	Yes	1	No	No	No	No	1000	Ta = -40 to +125	16#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	22	1	1	23	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FLL4AFB-C#UA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.17	Full Tray (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	64#	0.5mm	10 x 10 x 1.6	1#	2.7 - 5.5	50	DTC	Yes	1	No	No	No	No	160	Ta = -40 to +125	16#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	22	1	1	23	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FML3AFB-C#BA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.04	Full Carton (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	80#	0.5mm	12 x 12 x 1.6	1#	2.7 - 5.5	66	DTC	Yes	1	No	No	No	No	952	Ta = -40 to +105	17#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	23	1	1	31	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FML3AFB-C#HA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.04	Tape & Reel	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	80#	0.5mm	12 x 12 x 1.6	1#	2.7 - 5.5	66	DTC	Yes	1	No	No	No	No	1000	Ta = -40 to +105	17#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	23	1	1	31	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FML3AFB-C#UA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.04	Full Tray (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	80#	0.5mm	12 x 12 x 1.6	1#	2.7 - 5.5	66	DTC	Yes	1	No	No	No	No	119	Ta = -40 to +105	17#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	23	1	1	31	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FML4AFB-C#BA0	Active	Available	In Stock	LFQFP	1ku \| $3.25	Full Carton (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	80#	0.5mm	12 x 12 x 1.6	1#	2.7 - 5.5	66	DTC	Yes	1	No	No	No	No	952	Ta = -40 to +125	17#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	23	1	1	31	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FML4AFB-C#HA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.25	Tape & Reel	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	80#	0.5mm	12 x 12 x 1.6	1#	2.7 - 5.5	66	DTC	Yes	1	No	No	No	No	1000	Ta = -40 to +125	17#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	23	1	1	31	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FML4AFB-C#UA0	Active	N/A	In Stock	LFQFP	1ku \| $3.25	Full Tray (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	80#	0.5mm	12 x 12 x 1.6	1#	2.7 - 5.5	66	DTC	Yes	1	No	No	No	No	119	Ta = -40 to +125	17#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	23	1	1	31	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FPL3AFB-C#BA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.14	Full Carton (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	100#	0.5mm	14 x 14 x 1.6	1#	2.7 - 5.5	84	DTC	Yes	1	No	No	No	No	720	Ta = -40 to +105	17#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	29	1	1	31	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FPL3AFB-C#HA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.14	Tape & Reel	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	100#	0.5mm	14 x 14 x 1.6	1#	2.7 - 5.5	84	DTC	Yes	1	No	No	No	No	1000	Ta = -40 to +105	17#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	29	1	1	31	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FPL3AFB-C#UA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.14	Full Tray (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	100#	0.5mm	14 x 14 x 1.6	1#	2.7 - 5.5	84	DTC	Yes	1	No	No	No	No	90	Ta = -40 to +105	17#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	29	1	1	31	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FPL4AFB-C#BA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.36	Full Carton (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	100#	0.5mm	14 x 14 x 1.6	1#	2.7 - 5.5	84	DTC	Yes	1	No	No	No	No	720	Ta = -40 to +125	17#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	29	1	1	31	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FPL4AFB-C#HA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.36	Tape & Reel	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	100#	0.5mm	14 x 14 x 1.6	1#	2.7 - 5.5	84	DTC	Yes	1	No	No	No	No	1000	Ta = -40 to +125	17#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	29	1	1	31	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN
R7F125FPL4AFB-C#UA0	Active	N/A	Out of Stock	LFQFP	1ku \| $3.36	Full Tray (Tray)	RL78	RL78/F2x	F25	RL78	RL78-S3	No	No	16	512KB	16KB	40KB	Yes	100#	0.5mm	14 x 14 x 1.6	1#	2.7 - 5.5	84	DTC	Yes	1	No	No	No	No	90	Ta = -40 to +125	17#	Yes	40MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	4	4	4#	2	No	No	3#	No	20	19#	No	1	Yes	29	1	1	31	No	No	No	No	No	Secure Boot, AES, TRNG	Single wire serial	3	MALAYSIA	JAPAN

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Inductive Position Sensor with Dual-Coil Sensing Element Featuring SENT and High-Speed UART Interfaces

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RAJ2800034H12HPF

Intelligent Power Device for Automotive Application

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Application Note
Capacitive Touch Sensor Microcontrollers Overview of CTSU Functional Safety Self Test
PDF 6.87 MB R11AN0512EJ0200 Rev.2.00 日本語 May 27, 2026
Functional safety functions are becoming an important on system design as automatic electronic control systems continue to expand to a wide range of applications. This APN describes the software for capacitive touch sensor(CTSU) functional safety self test.
Brochure
RL78 Automotive MCU Scout
PDF 2.19 MB R70PF0027ED1900 Rev.19.00 May 19, 2026
Application Note
Capacitive Sensor MCU QE for Capacitive Touch Advanced Mode Parameter Guide
PDF 3.46 MB R30AN0428EJ0330 Rev.3.30 日本語简体中文 Mar 24, 2026
This application note describes parameter tuning methods using QE for Capacitive Touch for microcontrollers that incorporate a Capacitive Touch Sensing Unit (CTSU). In addition to the default auto-tuning process, it provides an overview of the Advanced mode and adjustable CTSU parameters for optimizing touch performance.
Application Note
RL78 Family TOUCH Module Software Integration System Rev.2.30
PDF 956 KB R11AN0485EJ0230 Rev.2.30 日本語 Mar 24, 2026
AI-generated Summary: The TOUCH Module integrates capacitive touch detection using the CTSU hardware, supporting buttons, sliders, and wheels with configurable settings via QE for Capacitive Touch. It processes periodic capacitance measurements to determine touch states, employing baseline calibration, drift correction, hysteresis, and debouncing to ensure accurate touch detection and reduce noise. The module supports both self-capacitance and mutual-capacitance buttons, with majority judgment modes for reliable input. It provides APIs for initialization, scanning, data retrieval, sensitivity adjustment, and drift control, enabling flexible integration into RL78 microcontroller applications.
Related Files:
Sample Code
Application Note
RL78 Family CTSU Module Software Integration System Rev.2.30
PDF 1.58 MB R11AN0484EJ0230 Rev.2.30 日本語 Mar 24, 2026
AI-generated Summary: The CTSU module integrates capacitive touch sensing functions for RL78 microcontrollers, supporting multiple peripheral types with distinct features. It enables various measurement modes such as self-capacitance, mutual capacitance, and current measurement, with advanced functions including sensor correction, initial offset adjustment, multi-frequency measurements, shield functionality, and automatic judgment. Measurements can be triggered by software or external events, with results obtained via APIs. The module also supports diagnosis, moving average filtering, and temperature correction. Multi-clock measurements reduce noise, and calibration functions ensure accurate sensor readings. The document details API usage, hardware/software requirements, and operational modes, providing comprehensive guidance for integrating capacitive touch sensing in embedded systems.
Related Files:
Sample Code
Product Change Notice
Wafer-fabrication factory addition for RL78/F25 products (EPPO3-EX-26-0002)
PDF 1.52 MB EPPO3-EX-26-0002 日本語 Feb 02, 2026
Application Note
Capacitive Sensor Microcontrollers CTSU Capacitive Touch Introduction Guide
PDF 2.42 MB R30AN0424EJ0160 Rev.1.60 日本語简体中文 Dec 23, 2025
AI-generated Summary: Capacitive touch sensor microcontrollers utilize Renesas' Capacitive Touch Sensing Unit (CTSU) technology embedded in RX, RA, RL78 families, and Renesas Synergy™. The document explains capacitance detection principles, including self-capacitance and mutual-capacitance methods, and details the evolution from first-generation sensors to advanced CTSU2. It covers MCU lineups, hardware design guidelines, software configuration, tuning procedures, development environments, and evaluation kits to support capacitive touch product development. The CTSU converts capacitance changes into measurable signals, applying filtering and threshold judgment to detect touch inputs accurately.
Application Note
RL78 Family FFT Library: Deployment Guide Rev.1.10
PDF 1.08 MB R20AN0150EJ0110 Rev.1.10 日本語 Dec 22, 2025
Provides information for deploying FFT (Fast Fourier Transform) library.
Related Files:
Sample Code
Application Note
RL78 Family RL78 Digital Signal Controller Library - Filter Rev.2.06
PDF 1.83 MB R01AN1665EJ0206 Rev.2.06 日本語 Dec 22, 2025
Presents the specifications for a Digital Signal Controller (DSC) library function for the Renesas RL78, which includes generic specifications, detailed specifications for filter algorithm kernels, and guidelines for the DSC Library API.
Related Files:
Sample Code
Model - IBIS
IBIS Files for RL78/F25
Log in to Download ZIP 7.31 MB 20251222-rs-IBIS_RL78F25_V100 Dec 16, 2025
Application Note
RL78 Family Board Support Package Module Using Software Integration System Rev.1.92
PDF 842 KB R01AN5522EJ0192 Rev.1.92 日本語 Oct 30, 2025
The Renesas board support package SIS module (r_bsp) forms the foundation of any project that uses Software Integration System (SIS) modules. The r_bsp is easily configurable and provides all the code needed to get the MCU and the board from reset to the main() function. This document describes r_bsp conventions and explains how to use it, configure it, and create a BSP for your own board.
Related Files:
Sample Code
Application Note
RL78 Family Flash programmer with Raspberry Pi (RL78 Protocol D) Rev.1.00
PDF 813 KB R01AN8038EJ0100 Rev.1.00 日本語 Oct 27, 2025
This application note describes how to write the program to the internal flash memory of the RL78 MCUs that supports the RL78 Protocol D by the Raspberry Pi 4 Model B+. Serial programming of the RL78 Protocol D is used for writing. The Raspberry Pi is used as a programmer; the program rewriting file is executed to send the rewrite data for the write operation.
Related Files:
Sample Code
Application Note
RL78 Family RL78 Flash Programmer (RL78 Protocol D) Rev.1.00
PDF 1.69 MB R01AN7905EJ0100 Rev.1.00 日本語 Oct 14, 2025
This application note describes how to write the program to the internal flash memory of the RL78 MCUs that supports the RL78 Protocol D. Serial programming of the RL78 Protocol D is used for writing. There are two modes: Online Mode, in which the host PC sends commands to perform rewriting, and Offline Mode, in which the data to be rewritten is downloaded from the host PC in advance and rewriting is triggered by pressing a switch.
Related Files:
Sample Code
Application Note
RL78/F22, F25 Safety Function Rev.1.00
PDF 815 KB R01AN7702EJ0100 Rev.1.00 日本語 Sep 30, 2025
This application note explains how to use the safety features implemented in the RL78/F22 and RL78/F25 microcontrollers (MCUs).It can be used to support functional safety in user systems and to detect faults in microcontrollers.
Application Note
RL78/F22, F25 Interrupt Source Determination Procedure Rev.1.00
PDF 452 KB R01AN7701EJ0100 Rev.1.00 日本語 Sep 30, 2025
Some interrupt vector tables of the target devices (RL78/F22, F25) share multiple interrupt sources with one interrupt vector table. When using multiple interrupt sources assigned to the same interrupt vector table at the same time, it is necessary to determine which interrupt has occurred in the interrupt handler, or whether both interrupts have occurred.This application note describes how to determine the interrupt source when using both interrupt sources simultaneously.

Datasheets (1)

Datasheet
RL78/F22, F25 Datasheet
RECOMMENDED
PDF 2.53 MB R01DS0490EJ0120 Rev.1.20 Jun 30, 2025
RL78/F25 is equipped with 2 channels of CAN-FD function and is the first Renesas automotive microcontroller to feature capacitive touch functionality. This is the datasheet for the RL78/F22 and F25 products.

Manuals & Guides (2)

Manual - Hardware
RL78/F22, F25 User's Manual: Hardware
RECOMMENDED
PDF 29.9 MB R01UH1061EJ0120 Rev.1.20 日本語 Jun 30, 2025
RL78/F25 is equipped with 2 channels of CAN-FD function and is the first Renesas automotive microcontroller to feature capacitive touch functionality. This is the user's Manual for the RL78/F22 and F25 products.
Manual - Hardware
RL78 Family User's Manual: Software Rev.2.30
PDF 1.3 MB R01US0015EJ0230 Rev.2.30 日本語 Apr 22, 2022

Application Notes & White Papers (32)

Application Note
Capacitive Touch Sensor Microcontrollers Overview of CTSU Functional Safety Self Test
PDF 6.87 MB R11AN0512EJ0200 Rev.2.00 日本語 May 27, 2026
Functional safety functions are becoming an important on system design as automatic electronic control systems continue to expand to a wide range of applications. This APN describes the software for capacitive touch sensor(CTSU) functional safety self test.
Application Note
Capacitive Sensor MCU QE for Capacitive Touch Advanced Mode Parameter Guide
PDF 3.46 MB R30AN0428EJ0330 Rev.3.30 日本語简体中文 Mar 24, 2026
This application note describes parameter tuning methods using QE for Capacitive Touch for microcontrollers that incorporate a Capacitive Touch Sensing Unit (CTSU). In addition to the default auto-tuning process, it provides an overview of the Advanced mode and adjustable CTSU parameters for optimizing touch performance.
Application Note
RL78 Family TOUCH Module Software Integration System Rev.2.30
PDF 956 KB R11AN0485EJ0230 Rev.2.30 日本語 Mar 24, 2026
AI-generated Summary: The TOUCH Module integrates capacitive touch detection using the CTSU hardware, supporting buttons, sliders, and wheels with configurable settings via QE for Capacitive Touch. It processes periodic capacitance measurements to determine touch states, employing baseline calibration, drift correction, hysteresis, and debouncing to ensure accurate touch detection and reduce noise. The module supports both self-capacitance and mutual-capacitance buttons, with majority judgment modes for reliable input. It provides APIs for initialization, scanning, data retrieval, sensitivity adjustment, and drift control, enabling flexible integration into RL78 microcontroller applications.
Related Files:
Sample Code
Application Note
RL78 Family CTSU Module Software Integration System Rev.2.30
PDF 1.58 MB R11AN0484EJ0230 Rev.2.30 日本語 Mar 24, 2026
AI-generated Summary: The CTSU module integrates capacitive touch sensing functions for RL78 microcontrollers, supporting multiple peripheral types with distinct features. It enables various measurement modes such as self-capacitance, mutual capacitance, and current measurement, with advanced functions including sensor correction, initial offset adjustment, multi-frequency measurements, shield functionality, and automatic judgment. Measurements can be triggered by software or external events, with results obtained via APIs. The module also supports diagnosis, moving average filtering, and temperature correction. Multi-clock measurements reduce noise, and calibration functions ensure accurate sensor readings. The document details API usage, hardware/software requirements, and operational modes, providing comprehensive guidance for integrating capacitive touch sensing in embedded systems.
Related Files:
Sample Code
Application Note
Capacitive Sensor Microcontrollers CTSU Capacitive Touch Introduction Guide
PDF 2.42 MB R30AN0424EJ0160 Rev.1.60 日本語简体中文 Dec 23, 2025
AI-generated Summary: Capacitive touch sensor microcontrollers utilize Renesas' Capacitive Touch Sensing Unit (CTSU) technology embedded in RX, RA, RL78 families, and Renesas Synergy™. The document explains capacitance detection principles, including self-capacitance and mutual-capacitance methods, and details the evolution from first-generation sensors to advanced CTSU2. It covers MCU lineups, hardware design guidelines, software configuration, tuning procedures, development environments, and evaluation kits to support capacitive touch product development. The CTSU converts capacitance changes into measurable signals, applying filtering and threshold judgment to detect touch inputs accurately.

View More (32)

Product Notices (PCN, EOL, etc) (2)

Product Change Notice
Wafer-fabrication factory addition for RL78/F25 products (EPPO3-EX-26-0002)
PDF 1.52 MB EPPO3-EX-26-0002 日本語 Feb 02, 2026
End Of Life Notice
End Of Life Notice [SAF-B-24-0011]
PDF 8.06 MB SAF-B-24-0011 日本語 Jun 12, 2024

Quality & Reliability (4)

Product Reliability Report
R7F125FPLxAFB-C(x=3/4) Reliability Report for AEC-Q100
PDF 511 KB MCR-25-0334 Aug 20, 2025
Product Reliability Report
R7F125FMLxAFB-C(x=3/4) Reliability Report for AEC-Q100
PDF 511 KB MCR-25-0333 Aug 20, 2025
Product Reliability Report
R7F125FLLxAFB-C(x=3/4) Reliability Report for AEC-Q100
PDF 529 KB MCR-25-0332 Aug 20, 2025
Product Reliability Report
R7F125FGLxAFB-C(x=3/4) Reliability Report for AEC-Q100
PDF 510 KB MCR-25-0331 Aug 20, 2025

Marketing Collateral (1)

Brochure
RL78 Automotive MCU Scout
PDF 2.19 MB R70PF0027ED1900 Rev.19.00 May 19, 2026

Renesas Boards & Kits

TB-RL78/F25

RL78/F25 (R7F125FPL) Target Board

As a CPU board usable in connection with the on-chip debugging emulators E2 and E2 Lite, the RL78/F25 (R7F125FPL) target board enables simple and easy evaluation of the RL78/F25 MCU.

Note: This board comes with two touch buttons for simple evaluation, but when designing an actual board, please... Read More

Capacitive Touch Evaluation System for RL78/F25

The RL78/F25 capacitive touch evaluation system (RSSK-RL78F25) makes it easy for users to evaluate touch solutions offered by Renesas. You can start evaluating immediately out of the box using the board and software included in each kit.

Partner Boards & Kits

Connectivity Module

CAN Bus J1939 Bridge (for Heavy-Duty)

Provides a high-performance communication bridge for heavy-duty commercial vehicles. Enables seamless data acquisition and translation from the Controller Area Network (CAN) J1939 protocol to telematics systems. Supports Fleet Management System (FMS) data standards to monitor vehicle diagnostics, fuel consumption, and environmental metrics. Designed to assist fleet operators in achieving ESG goals through precise carbon emission tracking and real-time vehicle status monitoring. The solution simplifies the integration of complex J1939 data into cloud-based management platforms.

Provided By:

SwiSys Co., Ltd.

RL78 Family Microcontroller Board by HOKUTO DENSHI.

Evaluation

RL Family Microcontroller Board

This solution provides a general-purpose evaluation board featuring Renesas RL Family microcontrollers. It is offered as a standalone board or as kit products supporting functions such as LIN, CAN, touch key interfaces, and brushless motor control.

Provided By:

HOKUTO DENSHI

SMART-WAKEUP-CT-REF

Capacitive Touch Smart Wake Up Reference Design

The Smart Wake Up reference design enables low-power consumption standby with a capacitive touch evaluation system.

Additional Videos

Find All RL78 Family Videos

News & Blog Posts

Blog Post

Sep 24, 2025

The RL78/F25 Microcontroller Plays a Key Role in the Next Generation of E/E Architecture

Support Communities

Mutual capacitance with RL78/F25 and QE for capacitve touch sensor
Hi, I am working with the RL78/F25 and trying to measure a capacitive sensor using QE for Capacitive Touch. When I use self‑capacitance everything works fine, but when I switch to mutual capacitance nothing works — neither the capacitive sensor nor the keypad. Is there a way to ...
Mar 31, 2026
- RL78 MCU
- Forum
communication using COM port with rl78/f25
I am using the RL78/F25 with Renesas Flash Programmer on Windows. When I try to connect using a COM port (I do not have an emulator), I always get this error: Connecting the tool Tool: COM port (COM13), Interface: 2-wire UART Connecting to the target device Disconnecting ...
Feb 17, 2026
- RL78 MCU
- Forum
RL78/F25
I am working with the RL78/F25 (RTK7F125FPCT0000BJ) on Ubuntu using e² studio and the E2 Lite emulator. For my first example project, I tried turning on the two user LEDs (LED2 on P106 and LED3 on P107). I configured the pins with Smart Configurator and developed a simple ...
Mar 12, 2026
- RL78 MCU
- Forum

View All Results from Support Communities (17)

Knowledge Base

Difference between RL78/G23 and RL78/F25 touch function
The capacitive sensor unit on the RL78/F25 adds a multi-electrode connection (MEC) and auto judgment function.MEC can connect multiple touch channels to a single inside the MCU for touch detection. Auto Judgment can determine touch on/off without starting the CPU.
Sep 24, 2025
RL78 Family: How to configure the option bytes, the on-chip debug security ID, and the flash serial programming security ID
... flash serial programming security ID configured? Answer The integrated development environment (IDE) coding assistance features are used. As an example, the procedures for using the RL78/F25 are described for both e² studio and CS+. In both e² studio and CS+, there are two methods: directly specifying the setting ...
May 8, 2026
RL78 Family: How do you pick the right pull-up resistors for I²C communication?
... it (1). Suitable Products RL78/F12, RL78/F13, RL78/F14, RL78/F15, RL78/F22, RL78/F23, RL78/F24, RL78/F25, RL78/G10, RL78/G11, RL78/G12, RL78/G13, RL78/G13A, RL78/G14, RL78/G15, RL78 ...
Dec 16, 2025

View All Results from Knowledge Base (6)

Support Communities

Get quick technical support online from Renesas Engineering Community technical staff.

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Knowledge Base

Browse our knowledge base for helpful articles, FAQs, and other useful resources.

Browse Articles

Submit a Ticket

Need to ask a technical question or share confidential information?

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ROM Ordering

Embed your custom code into Renesas masked MCUs during manufacturing for tailored device functionality.

ROM Ordering

Partners

FPT Software Co., Ltd.

Founded in 2005, FPT Automotive employs nearly 5,000 engineers to advance SDV technology with a focus on safety and seamless integration. MaaZ-Lite is a streamlined and cost-effective version of MaaZ that supports standardized automotive software development with full AUTOSAR Classic compliance. FPT Automotive is a partner of SCSK supporting the global markets outside Japan.

SCSK Corporation

SCSK provides the QINeS-Lite software platform to maximize the performance and ensure stable operation of RL78/F24 and its sequel products. QINeS-Lite is developed based on 10 years of experience since SCSK launched its first AUTOSAR-compatible "QINeS-BSW" in Japan with the consideration of future market trends to meet the needs of the Japan market.

Murata Manufacturing Co., Ltd.

Temperature detection solution: Combine with an NTC thermistor for precise high-temperature monitoring.

English

Next-Generation Actuator and Sensor Microcontroller with Capacitive Touch Function

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Murata Manufacturing Co., Ltd.