The successors to the 78K0R and R8C, with the industry's lowest level of consumption current. Automotive general-purpose low-end microcontrollers with various built-in functions necessary for automotive application communications and implementing functional safety.


RL78/F12 microcontrollers are available in a 20 to 64-pin, 8 to 64 KB flash memory lineup, and realize the industry's lowest level of consumption current. They have a built-in LIN module as an automotive interface. With various built-in functions for realizing functional safety including flash memory CRC calculation, illegal memory access detection, RAM guard, A/D converter testing, and SFR guard, a highly reliable system can be built, so these microcontrollers can be used for industrial applications and of course automotive applications.


Product Status: Product Inquiry
Family: RL78
Series: RL78/F1x
Group: RL78/F12


RL78/F12 Block Diagram


Program memory
32 KB Flash memory
2 KB
Data Flash
4 KB
CPU (Bit, Clock, DMA, External Bus etc)
RL78 (16-bit)
Max. Frequency
32 MHz
Sub-Clock (32.768 kHz)
On-chip Oscillator Freq.
32M, 24M, 16M, 12M, 8M, 4M, 1M Low-speed Oscillator 15kHz
Real-Time Clock (RTC)
Power-On Reset
Low Voltage Detection
DMA Remarks
DMAC x 2 ch
External Interrupt Pins
I/O Ports
16-bit Timers
8 ch
Watchdog Timers
1 ch
Other Timers
Interval Timer x 1 ch, Wakeup Timer x 1ch
PWM Output
A/D Converters
10-bit x 10 ch
6 ch
5 ch
5 ch
2 ch
Operating Conditions
Operating Voltage
2.7 to 5.5 V
Power Supply
Operating Temperature
-40 to 125 ℃ (Ambient Temperature)

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