RL78/G1H CHAPTER 5 PORT FUNCTIONS
R01UH0575EJ0120 Rev. 1.20 Page 71 of 920
Dec 22, 2016
5.2.9 Port 10
Port 10 is an I/O port with an output latch. Port 10 can be set to the input mode or output mode in 1-bit units using
port mode register 10 (PM10). When the P100 to P102 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 10 (PU10).
Set the P100 pin to digital I/O using port mode control register 10 (PMC10).
Reset signal generation sets P100 to prohibit digital I/O.
5.2.10 Port 12
P120 is an I/O port with an output latch. Port 12 can be set to the input mode or output mode in 1-bit units using
port mode register 12 (PM12). When used as an input port, use of an on-chip pull-up resistor can be specified by
pull-up resistor option register 12 (PU12).
P121 to P124 are 4-bit input ports.
To use the P120 pin as a digital I/O port, set it to digital I/O using port mode control register 12 (PMC12).
This port can also be used for A/D converter analog input, resonator connection for the subsystem clock,
external clock input for the main system clock, and external clock input for the subsystem clock.
Reset signal generation sets P120 to analog function, and sets P121 to P124 to input port.
5.2.11 Port 13
P130 is a 1-bit output-only port with an output latch. P137 is a 1-bit input-only port.
P130 is fixed an output port, and P137 is fixed an input ports.
This port can also be used for external interrupt request input.
Connect the P130 pin to STANDBY pin.
Remark When reset is effected, P130 outputs a low level. If P130 is set to output a high level before reset is
effected, the output signal of P130 can be dummy-output as the CPU reset signal.
P130
Set by software
Reset signal
To Next Page
Loading...
Need help?
General
