h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 251
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: 251 of 1165
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Port 1 Register (PORT1)
Note: * Determined by state of pins P17 to P10.
PORT1 is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of
output data for the port 1 pins (P17 to P10) must always be performed on P1DR.
If a port 1 read is performed while P1DDR bits are set to 1, the P1DR values are read. If a port 1
read is performed while P1DDR bits are cleared to 0, the pin states are read.
After a reset and in hardware standby mode, PORT1 contents are determined by the pin states, as
P1DDR and P1DR are initialized. PORT1 retains its prior state in software standby mode.
Bit
Initial value :
R/W
:
:
P17
— *
R
7
P16
— *
R
6
P15
— *
R
5
P14
— *
R
4
Rev. 5.00 Sep 22, 2005 page 225 of 1136
P13
— *
R
3
P12
— *
R
2
Section 9 I/O Ports
REJ09B0257-0500
P11
— *
R
1
P10
— *
R
0
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