HD64F38602R Datasheet, PDF (164/552 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Section 8 I/O Ports
8.3.5 Input Pull-Up MOS
Port 8 has an on-chip input pull-up MOS function that can be controlled by software. When a
PCR8 bit is cleared to 0, setting the corresponding PUCR8 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.
PCR8n
0
PUCR8n
0
1
Input Pull-Up MOS
Off
On
[Legend] x: Don't care.
(n = 4 to 2)
1
x
Off
8.4 Port 9
Port 9 is an I/O port also functioning as an SSU I/O pin, IIC2 I/O pin and interrupt pin. Figure 8.4
shows its pin configuration.
P93/SSI (IRQ1)
P92/SSO (IRQ0)
P91/SSCK/SDA
P90/SCS/SCL
P93/SCS (IRQ1)
P92/SSCK (IRQ0)
P91/SSO/SDA
P90/SSI/SCL
(1) SSUS = 0
(2) SSUS = 1
Figure 8.4 Port 9 Pin Configuration
Port 9 has the following registers.
• Port data register 9 (PDR9)
• Port control register 9 (PCR9)
• Port open-drain control register 9 (PODR9)
• Port pull-up control register 9 (PUCR9)
Rev. 3.00 May 15, 2007 Page 132 of 516
REJ09B0152-0300