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Section 32 General Purpose I/O Ports
Page 1702 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
32.2.6 Port B Data Registers 0, 1 (PBDR0, PBDR1)
PBDR0 and PBDR1 are 16-bit readable/writable registers that store port B data. The PB22DR to
PB1DR bits correspond to the PB22 to PB1 pins, respectively.
When a pin function is general output, if a value is written to PBDR1 or PBDR0, the value is
output directly from the pin, and if PBDR is read, the register value is returned directly regardless
of the pin state.
When a pin function is general input, if PBDR1 or PBDR0 is read, the pin state, not the register
value, is returned directly. If a value is written to PBDR1 or PBDR0, although that value is written
into PBDR1 or PBDR0, it does not affect the pin state. Table 32.14 summarizes PBDR1/PBDR0
read/write operation.
(1) Port B Data Register 1 (PBDR1)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0000000000000000
R R R R R R R R R R/W R/W R/W R/W R/W R/W R/W
--------
PB22
DR
PB21
DR
PB20
DR
PB19
DR
PB18
DR
PB17
DR
PB16
DR
-
Bit:
Initial value:
R/W:
Bit Bit Name Initial Value R/W Description
15 to 7 All 0 R Reserved
These bits are always read as 0. The write
value should always be 0.
6 PB22DR 0 R/W See table 32.14
5 PB21DR 0 R/W
4 PB20DR 0 R/W
3 PB19DR 0 R/W
2 PB18DR 0 R/W
1 PB17DR 0 R/W
0 PB16DR 0 R/W