Renesas rl78 User Manual

 

RL78/G1A 

 

CHAPTER  4   PORT  FUNCTIONS 

R01UH0305EJ0200  Rev.2.00 

 

 

102  

Jul 04, 2013 

Port 14 is an I/O port with an output latch.  Port 14 can be set to the input mode or output mode in 1-bit units using port 

mode register 14 (PM14).  When the P140, P141 pins are used as an input port, use of an on-chip pull-up resistor can be 

specified in 1-bit units by pull-up resistor option register 14 (PU14).   

This port can also be used for clock/buzzer output, and external interrupt request input, 

Reset signal generation sets P140, P141 to input mode. 

Port 15 is an I/O port with an output latch.  Port 15 can be set to the input mode or output mode in 1-bit units using port 

mode register 15 (PM15).   

This port can also be used for A/D converter analog input. 

To use P150/ANI8 to P154/ANI12 as digital input pins, set them in the digital I/O mode by using the A/D port 

configuration register (ADPC) and in the input mode by using the PM15 register.  Use these pins starting from the upper 

bit. 

To use 150/ANI8 to P154/ANI12 as digital output pins, set them in the digital I/O mode by using the A/D port 

configuration register (ADPC) and in the output mode by using the PM15 register.  Use these pins starting from the upper 

bit. 

To use 150/ANI8 to P154/ANI12 as analog input pins, set them in the analog input mode by using the A/D port 

configuration register (ADPC) and in the input mode by using the PM15 register.  Use these pins starting from the lower bit. 

 

ADPC Register 

PM15 Register 

ADS Register 

P150/ANI8 to P154/ANI12 Pins 

Input mode 

− 

Digital input 

Digital I/O selection 

Output mode 

− 

Digital output 

Selects ANI. 

Analog input (to be converted) 

Input mode 

Does not select ANI. 

Analog input (not to be converted)

Selects ANI. 

Analog input selection 

Output mode 

Does not select ANI. 

Setting prohibited 

 

All P150/ANI8 to P154/ANI12 are set in the analog input mode when the reset signal is generated. 

 

<R> 

<R>