Renesas rl78 User Manual

 

RL78/G1A 

 

CHAPTER  1   OUTLINE 

DMA (Direct Memory Access) controller 

• 2 channels 
•  Number of clocks during transfer between 8/16-bit SFR and internal RAM: 2 clocks 

 

Multiplier and divider/multiply-accumulator 

•  16 bits × 16 bits = 32 bits (Unsigned or signed) 
•  32 bits ÷ 32 bits = 32 bits (Unsigned) 
•  16 bits × 16 bits + 32 bits = 32 bits (Unsigned or signed) 

 

Serial interface 

•  CSI: 2 to 6 channels 
•  UART/UART (LIN-bus supported): 2 or 3 channels 
•  I

2

C/Simplified I

2

C communication:  2 to 7 channels 

 

Timer 

•  16-bit timer: 8 channels 
•  12-bit interval timer: 1 channel 
•  Real-time clock: 

1 channel (calendar for 99 years, alarm function, and clock correction function) 

•  Watchdog timer: 

1 channel (operable with the dedicated low-speed on-chip oscillator) 

 

A/D converter 

•  8/12-bit resolution A/D converter (V

DD

 = 1.6 to 3.6 V) 

•  Analog input: 13 to 28 channels 
•  Internal reference voltage (1.45 V) and temperature sensor

 

I/O port 

•  I/O port: 19 to 56 (N-ch open drain I/O [withstand voltage of 6 V]: 2 to 4, 

 

 N-ch open drain I/O [V

DD

 withstand voltage

/EV

DD

 withstand voltage

]: 6 to 12) 

•  Can be set to N-ch open drain, TTL input buffer, and on-chip pull-up resistor 
•  Different potential interface: Can connect to a 1.8/2.5 V device 
•  On-chip key interrupt function 
•  On-chip clock output/buzzer output controller 

 

Others 

•  On-chip BCD (binary-coded decimal) correction circuit 

 

Notes 1.  Can be selected only in HS (high-speed main) mode 

 2.  Products with 25 to 48 pins 

 

3.  Products with 64 pins 

 

The functions mounted depend on the product.  See 1.6  Outline of Functions. 

 

R01UH0305EJ0200  Rev.2.00 

 

 

2  

Jul 04, 2013