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RL78/D1A(Automotive Only)

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The following page content corresponds to the products marketed in Japan.
If you do not live in Japan, please

Product Overview:

The RL78/D1A is the successor of 78K0/Dx2 and suited for car instrumentation cluster and built-in car instrumentation cluster dedicated features such as Sound Generator, Stepper Motor Controller/Driver and LCD Segment Controller/Driver etc.

Pin Count / Memory Size Lineup:

Pin Count / Memory Size Lineup

Block Diagram:

Block Diagram image

Key Features:

48 pin 64 pin 80 pin 100 pin 128 pin
Memory Code Flash 24 to 64 KB 48 to 64 KB 48 to 256 KB 64 to 512 KB 256 to 512 KB
RAM 2 to 4 KB 3 to 4 KB 3 to 16 KB 4 to 24 KB 16 to 24 KB
Data Flash 8 KB
Register General purpose register : 8-bit x 32 registers (8-bit x 8 registers x 4 banks)
Clock High speed system clock: 1 to 20 MHz (VDD = 2.7 - 5.5 V)
High speed internal oscillator: 32, 24, 16, 8, 4 MHz (Ta = - 40 to +85 ℃) / 24, 16, 8, 4 MHz (Ta = -40 to +105 ℃)
Low speed internal oscillator: 15 kHz, Sub system clock: 32.768 kHz
I/O Port (I/O, In, Out) 38 (35, 3, 0) 54 (49, 5, 0) 68 (63, 5, 0) 84 (78, 5, 1) 112 (107, 5, 1)
Timer 16-bit 8 channels x3 units
Real Time Clock (RTC) 1 channel
Interval Timer 1 channel
Watchdog Timer 1 channel
Output 24 channels
RTC output 1 channel
10-bit A/D converter 3 + 2 channels 6 + 2 channels 7 + 2 channels 9 + 2 channels
Serial Interfaces CSI 2 channels 3 channels
UART - 1 channel
Simplify I2C 1 channel
LIN-UART 2 channels
CAN 0 or 1 channel 0 or 1 channel 0 or 1 channel 1 or 2 channels 2 channels
DMA controller 2 channels 4 channels
Stepper motor controller /driver(with ZPD) 1 channel 2 channels 4 channels
LCD controller/driver 27 seg. x4 com. 39 seg. x4 com. 48 seg. x4 com. 53 seg. x4 com. 54 seg. x4 com.
LCD bias Static, 1 / 3 bias, 1 / 4 duty
LCD bus interface - 8-bit
read/write
Sound generator Supported
Power supply voltage
2.7 to 5.5 V
Operating ambient temperature J grade products Ta = - 40 to + 85 ℃ / L grade products Ta = - 40 to +105 ℃

Key Applications:

Low-end car instrument cluster

Product Lineup:


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