Datasheet

Section 8 I/O Ports
Rev. 4.00 Sep 27, 2006 page 274 of 1130
REJ09B0327-0400
• Modes 2 and 3 (EXPE = 0)
A port B pin becomes an output port if the corresponding PBDDR bit is set to 1, and an input
port if the bit is cleared to 0.
Port B Output Data Register (PBODR)
Bit 76543210
PB7ODR PB6ODR PB5ODR PB4ODR PB3ODR PB2ODR PB1ODR PB0ODR
Initial value00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
PBODR is an 8-bit readable/writable register that stores output data for the port B pins (PB7 to
PB0). PBODR can always be read or written to, regardless of the contents of PBDDR.
PBODR is initialized to H'00 by a reset and in hardware standby mode. It retains its prior state in
software standby mode.
Port B Input Data Register (PBPIN)
Bit 76543210
PB7PIN PB6PIN PB5PIN PB4PIN PB3PIN PB2PIN PB1PIN PB0PIN
Initial value —* —* —* —* —* —* —* —*
Read/Write R R R R R R R R
Note: * Determined by the state of pins PB7 to PB0.
Reading PBPIN always returns the pin states.
PBPIN has the same address as P8DDR. If a write is performed, data will be written to P8DDR
and the port 8 settings will change.