HD6413003RF Datasheet, PDF (287/715 Pages) Renesas Technology Corp – Microcontroller (MCU)

Port B Data Direction Register (PBDDR): PBDDR is an 8-bit write-only register that can select
input or output for each pin in port B.
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
PB₇ DDR PB₆ DDR PB₅ DDR PB₄ DDR PB₃ DDR PB₂ DDR PB₁ DDR PB₀ DDR
0
0
0
0
0
0
0
0
W
W
W
W
W
W
W
W
Port B data direction 7 to 0
These bits select input or output for port B pins
A pin in port B becomes an output pin if the corresponding PBDDR bit is set to 1, and an input
pin if this bit is cleared to 0.
PBDDR is a write-only register. Its value cannot be read. All bits return 1 when read.
PBDDR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode
it retains its previous setting, so if a PBDDR bit is set to 1, the corresponding pin maintains its
output state in software standby mode.
Port B Data Register (PBDR): PBDR is an 8-bit readable/writable register that stores data for
pins PB₇ to PB₀.
Bit
Initial value
Read/Write
7
PB ₇
0
R/W
6
PB ₆
0
R/W
5
PB ₅
0
R/W
4
PB ₄
0
R/W
3
PB ₃
0
R/W
2
PB ₂
0
R/W
1
PB ₁
0
R/W
0
PB ₀
0
R/W
Port B data 7 to 0
These bits store data for port B pins
When a bit in PBDDR is set to 1, if port B is read the value of the corresponding PBDR bit is
returned directly. When a bit in PBDDR is cleared to 0, if port B is read the corresponding pin
level is read.
PBDR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it
retains its previous setting.
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