h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 271
h8s-2646
Manufacturer Part Number
h8s-2646
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2646.pdf
(1165 pages)
- Current page: 271 of 1165
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Port 3 Data Direction Register (P3DDR)
Bit
Initial value
Read/Write
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)
Bit
Initial value
Read/Write
P3DR is an 8-bit readable/writable register, which stores the output data of port 3 pins (P37 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.
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
Rev. 5.00 Sep 22, 2005 page 245 of 1136
P33DDR
P33DR
R/W
W
3
0
3
0
P32DDR
P32DR
R/W
W
2
0
2
0
Section 9 I/O Ports
P31DDR
P31DR
REJ09B0257-0500
R/W
W
1
0
1
0
P30DDR
P30DR
R/W
W
0
0
0
0
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