HD64F38602R Datasheet, PDF (169/552 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Section 8 I/O Ports
• P90/SCS/SCL pin
Register Name
PFCR
PCR9
Pin Function
Bit Name
SSUS
PCR90
Setting
x
0
P90 input pin
1
P90 output pin
0
x
SCS I/O pin
1
x
SSI I/O pin
x
x
SCL I/O pin
[Legend] x: Don't care.
Note: When this pin is used as the SCS/SSI pin, register settings of the SSU are required. For
details, see section 15.4.4, Communication Modes and Pin Functions, and appendix B.3,
Port 9 Related Register Settings and Pin Functions. When this pin is used as the SCL pin,
register settings of the IIC2 are required. For details, see section 16.3.1, I²C Bus Control
Register 1 (ICCR1).
Note that the priority when pin functions conflict is SSU pin > IIC2 pin > P90.
8.4.6 Input Pull-Up MOS
Port 9 has an on-chip input pull-up MOS function that can be controlled by software. When a
PCR9 bit is cleared to 0, setting the corresponding PUCR9 bit to 1 turns on the input pull-up MOS
for that pin. The input pull-up MOS function is in the off state after a reset.
PCR9n
0
PUCR9n
0
1
Input Pull-Up MOS
Off
On
[Legend] x: Don't care.
(n = 3 to 0)
1
x
Off
Rev. 3.00 May 15, 2007 Page 137 of 516
REJ09B0152-0300