3069RF-ZTAT Datasheet, PDF (440/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

11.2.3 Port B Data Direction Register (PBDDR)
PBDDR is an 8-bit write-only register that selects input or output for each pin in port B.
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
PB₇DDR PB₆DDR PB₅DDR PB₄DDR PB₃DDR PB₂DDR PB₁DDR PB₀DDR
0
0
0
0
0
0
0
0
W
W
W
W
W
W
W
W
Port B direction 7 to 0
These bits select input or
output for port B pins
Port B is multiplexed with pins TP₁₅ to TP₈. Bits corresponding to pins used for TPC output must
be set to 1. For further information about PBDDR, see section 8.12, Port B.
11.2.4 Port B Data Register (PBDR)
PBDR is an 8-bit readable/writable register that stores TPC output data for groups 2 and 3, when
these TPC output groups are used.
Bit
Initial value
Read/Write
7
PB₇
0
R/(W)*
6
PB₆
0
R/(W)*
5
PB₅
0
R/(W)*
4
PB₄
0
R/(W)*
3
PB₃
0
R/(W)*
2
PB₂
0
R/(W)*
1
PB₁
0
R/(W)*
0
PB₀
0
R/(W)*
Port B data 7 to 0
These bits store output data
for TPC output groups 2 and 3
Note: * Bits selected for TPC output by NDERB settings become read-only bits.
For further information about PBDR, see section 8.12, Port B.
Rev. 5.0, 09/04, page 418 of 978