Rev. 1.0, 09/02, page 130 of 568
Bit
Bit Name
Initial Value
R/W
Description
7 P37DDR 0
W
6 P36DDR 0
W
5 P35DDR 0
W
4 P34DDR 0
W
3 P33DDR 0
W
2 P32DDR 0
W
1 P31DDR 0
W
0 P30DDR 0
W
When a pin is specified as a general purpose I/O
port, setting this bit to 1 makes the corresponding
port 3 pin an output pin. Clearing this bit to 0 makes
the pin an input pin.
9.2.2
Port 3 Data Register (P3DR)
P3DR is an 8-bit readable/writable register that stores output data for port 3 pins.
Bit
Bit Name
Initial Value
R/W
Description
7 P37DR 0
R/W
6 P36DR 0
R/W
5 P35DR 0
R/W
4 P34DR 0
R/W
3 P33DR 0
R/W
2 P32DR 0
R/W
1 P31DR 0
R/W
0 P30DR 0
R/W
Output data for a pin is stored when the pin is
specified as a general I/O port.
9.2.3
Port 3 Register (PORT3)
PORT3 is an 8-bit read-only register that shows the pin states.
Содержание H8S/2627
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