SH7144_08 Datasheet, PDF (649/930 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series

17. Pin Function Controller (PFC)
17.1.3 Port B I/O Register (PBIOR)
The port B I/O register (PBIOR) is a 16-bit readable/writable register that is used to set the pins on
port B as inputs or outputs. Bits PB9IOR to PB0IOR correspond to pins PB9 to PB0 (names of
multiplexed pins are here given as port names and pin numbers alone). PBIOR is enabled when
port B pins are functioning as general-purpose inputs/outputs (PB9 to PB0). In other states,
PBIOR is disabled.
A given pin on port B will be an output pin if the corresponding bit in PBIOR is set to 1, and an
input pin if the bit is cleared to 0.
Bits 15 to 10 are reserved. These bits are always read as 0. The write value should always be 0.
The initial value of PBIOR is H'0000.
17.1.4 Port B Control Registers 1, 2 (PBCR1, PBCR2)
The port B control registers 1 and 2 (PBCR1 and PBCR2) are 16-bit readable/writable registers
that are used to select the multiplexed pin function of the pins on port B.
Rev.4.00 Mar. 27, 2008 Page 605 of 882
REJ09B0108-0400