Renesas RL78/G13 User Manual

RL78/G13 CHAPTER 4 PORT FUNCTIONS
R01UH0146EJ0100 Rev.1.00 222
Sep 22, 2011
4.2.10 Port 9
Port 9 is an I/O port with an output latch. Port 9 can be set to the input mode or output mode in 1-bit units using port
mode register 9 (PM9). When 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 9 (PU9).
Output from the P96 pin can be specified as N-ch open-drain output (V
DD tolerance) in 1-bit units using port output
mode register 9 (POM9).
This port can also be used for serial interface data I/O, clock I/O.
Reset signal generation sets port 9 to input mode.
Table 4-13. Settings of Registers When Using Port 9
Pin Name
Name I/O
PM9× POM9× Alternate Function Setting Remark
Input 1
− −
P90 to
P94
Output 0
−
Input 1
− ×
P95
Output 0
SCK11/SCL11 output = 1
Note
Input 1
× ×
0 0 CMOS output
P96
Output
0 1
SDA11 output = 1
Note
N-ch O.D. output
Input 1
− ×
P97
Output 0
SO11 output = 1
Note
Note P95/SCK11/SCL11, P96/SI11/SDA11 or P97/SO11 as a general-purpose port, set serial channel enable status
register 0 (SE0), serial output register 0 (SO0) and serial output enable register 0 (SOE0) to the default status.
Remark ×: don’t care
PM9×: Port mode register 9
POM9×: Port output mode register 9
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Renesas RL78/G13 Specifications

General

Brand	Renesas
Model	RL78/G13
Category	Computer Hardware
Language	English