H8S2110B RENESAS [Renesas Technology Corp], H8S2110B Datasheet - Page 157

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

7.10
Port 9 is an 8-bit I/O port. Port 9 pins also function as the interrupt input pins, IIC_0 I/O pin,
subclock input pin, and system clock ( ) output pin. P97 is an NMOS push-pull output. SDA0 is
an NMOS open-drain output, and has direct bus drive capability. Port 9 has the following
registers.
7.10.1
P9DDR specifies input or output for the pins of port 9 on a bit-by-bit basis.
Bit
7
6
5
4
3
2
1
0
Port 9 data direction register (P9DDR)
Port 9 data register (P9DR)
Bit Name
P97DDR
P96DDR
P95DDR
P94DDR
P93DDR
P92DDR
P91DDR
P90DDR
Port 9 Data Direction Register (P9DDR)
Port 9
Initial
Value
0
0
0
0
0
0
0
0
W
W
W
W
W
W
W
W
R/W
Description
When the corresponding P9DDR bits are set to 1, pin P96
functions as the
become output ports. When P9DDR bits are cleared to 0,
the corresponding pins become input ports.
Rev. 2.00 Mar 21, 2006 page 119 of 518
output pin and pins P97 and P95 to P90
Section 7 I/O Ports
REJ09B0299-0200