h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 322
h8s-2635
Manufacturer Part Number
h8s-2635
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2635.pdf
(1547 pages)
- Current page: 322 of 1547
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Section 9 I/O Ports
Port B Data Register (PBDR)
PBDR is an 8-bit readable/writable register that stores output data for the port B pins (PB7 to
PB0). PBDR is initialized to H'00 by a reset, and in hardware standby mode. It retains its prior
state in software standby mode.
Port B Register (PORTB)
Note: * Determined by state of pins PB7 to PB0.
PORTB is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of
output data for the port B pins (PB7 to PB0) must always be performed on PBDR.
If a port B read is performed while PBDDR bits are set to 1, the PBDR values are read. If a port B
read is performed while PBDDR bits are cleared to 0, the pin states are read.
After a reset and in hardware standby mode, PORTB contents are determined by the pin states, as
PBDDR and PBDR are initialized. PORTB retains its prior state in software standby mode.
Rev. 6.00 Feb 22, 2005 page 262 of 1484
REJ09B0103-0600
Bit
Initial value :
R/W
Bit
Initial value :
R/W
:
:
:
:
PB7DR
R/W
PB7
— *
R
7
0
7
PB6DR
R/W
PB6
— *
R
6
0
6
PB5DR
R/W
PB5
— *
R
5
0
5
PB4DR
R/W
PB4
— *
R
4
0
4
PB3DR
R/W
PB3
— *
R
3
0
3
PB2DR
R/W
PB2
— *
R
2
0
2
PB1DR
R/W
PB1
— *
R
1
0
1
PB0DR
R/W
PB0
— *
R
0
0
0
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