Section 8 I/O Ports
Rev. 1.00 Mar. 12, 2008 Page 234 of 1178
REJ09B0403-0100
8.1.9 Port
9
Port 9 is an 8-bit I/O port. Port 9 pins can function as the bus control input/output pins. The pin
functions change according to the operating mode. Port 9 has the following registers.
•
Port 9 data direction register (P9DDR)
•
Port 9 data register (P9DR)
(1)
Port 9 Data Direction Register (P9DDR)
The individual bits of P9DDR specify input or output for the port 9 pins.
Bit
Bit Name
Initial Value
R/W Description
7 P97DDR
0
W
6 P96DDR
0
W
5 P95DDR
0
W
4 P94DDR
0
W
3 P93DDR
0
W
2 P92DDR
0
W
1 P91DDR
0
W
0 P90DDR
0
W
If port 9 pins are specified for use as the general I/O
port, the corresponding pins function as output port
when the P9DDR bits are set to 1, and as input port
when cleared to 0.
Содержание H8S Family
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Страница 206: ...Section 6 Bus Controller BSC Rev 1 00 Mar 12 2008 Page 158 of 1178 REJ09B0403 0100...
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Страница 552: ...Section 14 CRC Operation Circuit CRC Rev 1 00 Mar 12 2008 Page 504 of 1178 REJ09B0403 0100...
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