SH7101 Datasheet, PDF (409/486 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

14. I/O Ports
Initial
Bit
Bit Name Value R/W Description
15 to 6 ⎯
All 0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
5
PB5DR 0
4
PB4DR 0
3
PB3DR 0
2
PB2DR 0
R/W See table 14.2
R/W
R/W
R/W
1, 0 ⎯
All 0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
Table 14.2 Port B Data Register (PBDR) Read/Write Operations
Bits 5 to 2:
PBIOR
0
1
Pin Function
General input
Other than
general input
General output
Other than
general output
Read
Pin state
Pin state
PBDR value
PBDR value
Write
Can write to PBDR, but it has no effect on pin state
Can write to PBDR, but it has no effect on pin state
Value written is output from pin
Can write to PBDR, but it has no effect on pin state
Rev.2.00 Sep. 27, 2007 Page 375 of 448
REJ09B0394-0200