HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 764
HD6417615
Manufacturer Part Number
HD6417615
Description
Hardware Manual
Manufacturer
Hitachi Semiconductor
Datasheet
1.HD6417615.pdf
(873 pages)
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18.3.4
The port B I/O register (PBIOR) is a 16-bit read/write register that selects the input/output
direction of the 16 multiplex pins in port B. Bits PB15IOR to PB0IOR correspond to individual
pins in port B. PBIOR is enabled when port B pins function as general input pins (PB15 to PB0),
and disabled otherwise. When port B pins function as PB15 to PB0, a pin becomes an output when
the corresponding bit in PBIOR is set to 1, and an input when the bit is cleared to 0.
PBIOR is initialized to H'0000 by a power-on reset. It is not initialized by a manual reset or in
standby mode or sleep mode.
Initial value:
Initial value:
Port B I/O Register (PBIOR)
R/W:
R/W:
Bit:
Bit:
PB15
R/W
PB7
R/W
IOR
IOR
15
0
7
0
PB14
R/W
PB6
R/W
IOR
IOR
14
0
6
0
PB13
R/W
PB5
R/W
IOR
IOR
13
0
5
0
PB12
R/W
PB4
R/W
IOR
IOR
12
0
4
0
PB11
R/W
PB3
R/W
IOR
IOR
11
0
3
0
PB10
R/W
PB2
R/W
IOR
IOR
10
0
2
0
PB9
R/W
PB1
R/W
IOR
IOR
9
0
1
0
PB8
R/W
PB0
R/W
IOR
IOR
8
0
0
0
753
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