RL78/G13 CHAPTER 2 PIN FUNCTIONS
R01UH0146EJ0100 Rev.1.00 83
Sep 22, 2011
(1) Port mode
P30 to P37 function as an I/O port. P30 and P31 can be set to input or output port in 1-bit units using port mode
register 3 (PM3).
(2) Control mode
P30 to P37 function as A/D converter analog input, external interrupt request input, real-time clock correction clock
output, serial interface data I/O, clock I/O, clock/buzzer output, and timer I/O.
(a) INTP3, INTP4
These are the external interrupt request input pins for which the valid edge (rising edge, falling edge, or both
rising and falling edges) can be specified.
(b) RTC1HZ
This is a real-time clock correction clock (1 Hz) output pin.
(c) SCK11
This is a serial clock I/O pin of serial interface CSI11.
(d) SCL11
This is a serial clock output pin of serial interface IIC11.
(e) TI03
This is a pin for inputting an external count clock/capture trigger to 16-bit timer 03.
(f) TO03
This is a timer output pin from 16-bit timer 03.
(g) PCLBUZ0
This is a clock/buzzer output pin.
(h) ANI21 to ANI23
These are the analog input pins (ANI21 to ANI23) of A/D converter.
When using these pins as analog input pins, see Figure 11-46. Analog Input Pin Connection.
2.2.5 P40 to P47 (port 4)
P40 to P47 function as an I/O port. These pins also function as serial interface data I/O, clock I/O, external interrupt
request input, data I/O for a flash memory programmer/debugger, and timer I/O.
Use of an on-chip pull-up resistor can be specified by pull-up resistor option register 4 (PU4).
Be sure to connect an external pull-up resistor to P40 when on-chip debugging is enabled (by using an option byte).
Input to the P43 and P44 pins can be specified through a normal input buffer or a TTL input buffer in 1-bit units, using
port input mode register 4 (PIM4).
Output from the P43 to P45 pins can be specified as normal CMOS output or N-ch open-drain output (V
DD tolerance) in
1-bit units, using port output mode register 4 (POM4).
The following operation modes can be specified in 1-bit units.
(1) Port mode
P40 to P47 function as an I/O port. P40 to P47 can be set to input or output port in 1-bit units using port mode
register 4 (PM4).
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