RL78/G13 CHAPTER 2 PIN FUNCTIONS
R01UH0146EJ0100 Rev.1.00 87
Sep 22, 2011
2.2.9 P80 to P87 (port 8)
P80 to P87 function as an I/O port.
Use of an on-chip pull-up resistor can be specified by pull-up resistor option register 8 (PU8).
Input to the P80 and P81 pins can be specified through a normal input buffer or a TTL input buffer in 1-bit units, using
port input mode register 8 (PIM8).
Output from the P80 to P82 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 8 (POM8).
(1) Port mode
P80 to P87 function as an I/O port. P80 to P87 can be set to input or output port in 1-bit units using port mode
register 8 (PM8).
2.2.10 P90 to P97 (port 9)
P90 to P97 function as an I/O port. These pins also function as serial interface data I/O and clock I/O.
Use of an on-chip pull-up resistor can be specified by pull-up resistor option register 9 (PU9).
Output from the P96 pin 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 9 (POM9).
(1) Port mode
P90 to P97 function as an I/O port. P90 to P97 can be set to input or output port in 1-bit units using port mode
register 9 (PM9).
(2) Control mode
P90 to P97 function as serial interface data I/O and clock I/O.
(a) SI11
This is a serial data input pin of serial interface CSI11.
(b) SO11
This is a serial data output pin of serial interface CSI11.
(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) SDA11
This is a serial data I/O pin of serial interface IIC11.
2.2.11 P100 to P106 (port 10)
P100 to P106 function as an I/O port. These pins also function as A/D converter analog input and timer I/O.
Use of an on-chip pull-up resistor can be specified by pull-up resistor option register 10 (PU10).
When the P100 pin is used as input, specify them as either digital or analog in Port mode control register 10 (PMC10).
This register can be specified in 1-bit unit.
The following operation modes can be specified in 1-bit units.
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