Renesas introduces the RL78/I1C - Industry’s lowest power microcontrollers for high-end Smart electricity meter market!


RL78/I1C microcontrollers feature integrated functions for high precision smart electricity metering, such as 24-bit Delta-Sigma A/D operation, AES H/W integration, up to 256 KB flash line-up, a 32-bit MAC (Multiply and Accumulation) function, independent power supply for RTC and enhance battery pin (Vbat) function for AC-off operation, and Hardware zero cross detection. Performance is enhanced with a high temperature coefficient internal reference voltage. A segment LCD driver supports 8-COM.


Main Solutions

Key Features:

Item RL78/I1C
Pin Count 64-pin 80-pin 80-pin 100-pin
Part Name R5F10NLE/G R5F10NME/G R5F10NMJ R5F10NPJ/G
Program Flash 64KB - 128KB 64KB - 128KB 256KB 128KB - 256KB
Data flash 2KB
SRAM 6KB - 8KB 6KB - 8KB 16KB 8KB - 16KB
System Clock External High Speed Clock 1MHz~20MHz, Low Speed Clock 32.768KHz
On Chip Oscillator Clock HS 1.5MHz~24MHz, MS 1MHz~4MHz, LS 15kHz
PLL Clock - 32KHz
HOCO Clock Frequency Correction Function Support
24-bit ΔƩ A/D Convertor Input Channel Number 4ch 3ch 3ch 4ch
SNDR ~80dB (Gain x 1)
Sampling Frequency 3.906kHz/1.953kHz
PGA x1, x2, x4, x8, x16, x32
Internal Ref. (Temperature coefficient) 0.8V (10ppm/°C)
Zero Cross Detection HW Zero Cross Detection
8/10-bit A/D Convertor 4ch 6ch
32-bit Multiply- Accumulator Support
LCD Segment//COM 15/8, 19/4 30/8, 34/4 30/8, 34/4 38/8, 42/4
LCD Drive Voltage Generation Method Int. Voltage Boost/ Capacitor Split/ Ext. Resistance Split Division
Timer Function 16-bit Timer Array Unit : 8ch, 12-bit Interval Timer: 1ch, 8-bit Interval Timer: 4ch
Independent Power Supply RTC 1ch
Serial I/F CSI0/UART0/Simple I2C0 1ch
CSI1/UART1/ Simple I2C1 1ch
UART2/IrDA - 1ch
CSI3/UART3/ Simple I2C3   1ch
Multi-Master I2C 1ch
Data Transfer Controller 29 Sources 31 Sources
Event Link Controller Event Generator 22Types, Event Output Selection 5 Types
Battery Backup Function CPU VDD/VBAT
ΔƩ A/D Convertor VDD/VBAT
RTC VRTC (Independent Power Supply)
Voltage Detection (LVD) Internal VDD, VDD pin, VBAT pin, VRTC pin, External pin
AES HW Cipher Modes GCM/ECB/CBC, Encryption key length 128/192/256-bit
Key Interrupt Function 5-pin 8-pin
Other Peripheral Function Watch Dog Timer, Power On Reset (POR), Safety Functions
Power Supply Voltage Range 1.7V~5.5V
Operating Ambient Temperature - 40 to 85°C

Pin Count / Memory Size Lineup:

Program Flash



Block Diagram:

You can find an explanation of orderable part numbers here.


Resources for Software and Hardware

Title Description
My Renesas Create a My Renesas account to use our tool download services, receive e-newsletter/update notifications, and take advantage of our other services.
e-learning Information for studying and learning about microcontrollers and microprocessors.
FAQ Frequently asked questions and useful hints for development.
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Software Design Support

Title Description
e² studio This integrated development environment (IDE) is based on the popular combination of the open-source Eclipse IDE and its CDT plug-in that enables C/C++ language development.
CS+ This integrated development environment (IDE) can be used for coding, assembly, compiling, and simulation. CS+ is also included with starter kits.
E2 emulator Lite This entry-level on-chip debugging emulator provides functionality equivalent to that of the E1 emulator at a low price.
E2 emulator This on-chip debugging emulator has advanced features that improve the efficiency of development. In addition to the basic functions from debugging to flash programming, this emulator supports hot plug-in and external triggers as standard items. This emulator also helps to reduce development time by downloading at high speeds (compared to the E1 emulator) and the ability to work in combination with various solutions such as the tuning of current drawn by systems under development.
E1 emulator This on-chip debugging emulator is a standard model which provides basic debugging functions (production is to be discontinued at the end of December 2019).
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