H8S2110B RENESAS [Renesas Technology Corp], H8S2110B Datasheet - Page 153

• Manufacturer Part Number: H8S2110B
• Description: Renesas 16-Bit Single-Chip Microcomputer Renesas H8S Family/H8S/2100 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

P7nDDR *
Pin Function
Note: * The program development tool (emulator) does not support this function. (n = 5 to 0)
7.9
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, 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 has the
following registers.
7.9.1
P8DDR specifies input or output for the pins of port 8 on a bit-by-bit basis.
Bit
7
6
5
4
3
2
1
0
P75 to P70
The pin function is switched as shown below according to the status of P7nDDR*.
Port 8 data direction register (P8DDR)
Port 8 data register (P8DR)
Bit Name
P86DDR
P85DDR
P84DDR
P83DDR
P82DDR
P81DDR
P80DDR
Port 8 Data Direction Register (P8DDR)
Port 8
Initial Value
1
0
0
0
0
0
0
0
P7n input pin
R/W
W
W
W
W
W
W
W
0
Reserved
The initial value should not be changed.
P8DDR has the same address as PBPIN, and if
read, the port B state will be returned.
The corresponding port 8 pins are output ports
when P8DDR bits are set to 1, and input ports
when cleared to 0.
Description
Rev. 2.00 Mar 21, 2006 page 115 of 518
P7n output pin *
Section 7 I/O Ports
1
REJ09B0299-0200