HD6432646 Hitachi, HD6432646 Datasheet - Page 277
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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Port 3 Data Direction Register (P3DDR)
P3DDR is an 8-bit write-dedicated register, which specifies the I/O for each port 3 pin by bit.
Read is disenabled. If a read is carried out, undefined values are read out.
By setting P3DDR to 1, the corresponding port 3 pins become output, and be clearing to 0 they
become input.
P3DDR is initialized to H'00 by a reset and in hardware standby mode. The previous state is
maintained in software standby mode. SCI is initialized, so the pin state is determined by the
specification of P3DDR and P3DR.
Port 3 Data Register (P3DR)
P3DR is an 8-bit readable/writable register, which stores the output data of port 3 pins (P35 to
P30).
P3DR is initialized to H'00 by a reset and in hardware standby mode. The previous state is
maintained in software standby mode.
Bit
Initial value
Read/Write
Bit
Initial value
Read/Write
P37DDR
P37DR
R/W
W
7
0
7
0
P36DDR
P36DR
R/W
W
6
0
6
0
P35DDR
P35DR
R/W
W
5
0
5
0
P34DDR
P34DR
R/W
W
4
0
4
0
P33DDR
P33DR
R/W
W
3
0
3
0
P32DDR
P32DR
R/W
W
2
0
2
0
P31DDR
P31DR
R/W
W
1
0
1
0
P30DDR
P30DR
R/W
W
0
0
0
0
243
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