HD64F2145 Datasheet, PDF (222/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

• P75/AN5, P74/AN4, P73/AN3, P72/AN2, P71/AN1, P70/AN0
Pin Function
P75 to P70 input pins
AN5 to AN0 input pin*
Note:* This pin can always be used as the AN5 to AN0 input pins.
8.9 Port 8
Port 8 is an 8-bit I/O port. Port 8 pins also function as SCI_1 I/O pins, the IIC_1 I/O pin, XBS I/O
pins, LPC I/O pins, and interrupt input pins. The output type of P86 and SCK1 is NMOS push-pull
output. The output type of SCL1 is NMOS open drain output and direct bus driving is enabled.
Port 8 pin functions are the same in all operating modes except host interface function. Port 8 has
the following registers.
• Port 8 data direction register (P8DDR)
• Port 8 data register (P8DR)
8.9.1 Port 8 Data Direction Register (P8DDR)
P8DDR specifies input or output for the pins of port 8 on a bit-by-bit basis.
Bit Bit Name Initial Value R/W Description
7
—
1
—
Reserved
The initial value must not be changed.
6
P86DDR 0
5
P85DDR 0
4
P84DDR 0
3
P83DDR 0
2
P82DDR 0
W
P8DDR has the same address as PBPIN, and if
W
read, the port B state will be returned.
W
The corresponding port 8 pins are output ports
when P8DDR bits are set to 1, and input ports
W
when cleared to 0.
W
1
P81DDR 0
W
0
P80DDR 0
W
Rev. 2.0, 08/02, page 182 of 788