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.

 

Key Features:

ITEM RL78/F12
Pin count 20-pin 30-pin 32-pin 48-pin 64-pin
Part Name R5F1096x R5F109Ax R5F109Bx R5F109Gx R5F109Lx
Program flash (Byte) 8 KB-64 KB 16 KB-64 KB
Data flash with background operation (Byte) 4 KB
SRAM (Byte) 0.5 KB-4 KB 1 KB-4 KB
OSC External High speed 1 MHz-20 MHz, Low speed 32.768 KHz
Internal High speed 32/24/16/12/8/4/1 MHz, Low speed 15 KHz
CPU RL78 CPU
I/O 16 26 28 44 58
Timer 16-bit: 8 ch / Interval Timer: 1 ch / Real Time Clock: 1 ch / Wake up Timer: 1 ch / Watch dog Timer: 1 ch
10-bit A/D 4 ch 8 ch 8 ch 10 ch 12 ch
Serial I/F 20-pin
  • CSI: 1 ch / UART: 1 ch / Simple I2C: 1 ch
  • CSI: 1 ch / UART: 1 ch
30-pin
32-pin
  • CSI: 2 ch / UART: 2 ch / Simple I2C: 2 ch
  • CSI: 1 ch / UART (support LIN-bus): 1 ch / Simple I2C: 1 ch
  • CSI (7-16 bit): 1 ch / UART (7-9, 16 bit): 1 ch
48-pin
  • CSI: 3 ch / UART: 2 ch / Simple I2C: 3 ch
  • CSI: 2 ch / UART (LIN-bus): 1 ch / Simple I2C: 2 ch
  • CSI (7-16 bit): 1 ch / UART (7-9, 16 bit): 1 ch
64-pin
  • CSI: 4 ch / UART: 2 ch / Simple I2C: 4 ch
  • CSI: 2 ch / UART (support LIN-bus): 1 ch / Simple I2C: 2 ch
  • CSI (7-16 bit): 2 ch / UART (7-9,16 bit): 1 ch
Common LIN-UART: 1 ch
External interrupt 5 ch 6 ch 10 ch 12 ch
DMA 2 ch
Other LVD, POR, key return
Voltage range 1.8 V-5.5 V
Operating temperature −40℃-85℃, −40℃-125℃

Pin Count / Memory Size Lineup:

Program Flash
SRAM

64KB
4KB
*1 *1 *1 *1 *1
48KB
3KB
32KB
2KB
24KB
1.5KB
16KB
1KB
8KB
0.5KB
       
Pins
Package
20
LSSOP
30
LSSOP
32
HWQFN
48
LFQFP
64
LFQFP

*1 : 3KB available when the self-programing function is used.

 

Block Diagram:

RL78/F12 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.
Forum A forum and community site to share technical information, questions and opinions with others who use Renesas products.

 

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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