SH7101 Datasheet, PDF (398/486 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

13. Pin Function Controller (PFC)
13.1.3 Port B I/O Register (PBIOR)
PBIOR is a 16-bit readable/writable register that is used to set the pins on port B as inputs or
outputs. Bits PB5IOR to PB2IOR correspond to pins PB5 to PB2 (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 (PB5 to PB2). 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 6, 1, and 0 are reserved. These bits are always read as 0. The write value should always
be 0.
PBIOR is initialized to H'0000.
Rev.2.00 Sep. 27, 2007 Page 364 of 448
REJ09B0394-0200