SH7280 Datasheet, PDF (1318/1726 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine family

Section 24 I/O Ports
24.2.2 Port B Data Registers H and L (PBDRH and PBDRL)
PBDRH and PBDRL are 16-bit readable/writable registers that store port B data. In SH7243, Bits
PB12DR, PB11DR, PB8DR to PB6DR, PB1DR and PB0DR correspond to pins PB12, PB11, PB8
to PB6, PB1 and PB0 respectively (description of multiplexed functions are abbreviated here). In
SH7285, Bits PB12DR to PB6DR and PB3DR to PB0DR correspond to pins PB12 to PB6, and
PB3 to PB0 respectively (description of multiplexed functions are abbreviated here). In SH7286,
Bits PB19DR to PB6DR and PB3DR to PB0DR correspond to pins PB19 to PB6 and PB3 to PB0
respectively (description of multiplexed functions are abbreviated here).
When a pin function is general output, if a value is written to PBDRH or PBDRL, the value is
output directly from the pin, and if PBDRH or PBDRL is read, the register value is returned
directly regardless of the pin state.
When a pin function is general input, if PBDRH or PBDRL is read, the pin state, not the register
value, is returned directly. If a value is written to PBDRH or PBDRL, although that value is
written into PBDRH or PBDRL, it does not affect the pin state. Table 24.4 summarizes read/write
operations of port B data register.
Rev. 1.00 Jun. 26, 2008 Page 1288 of 1692
REJ09B0393-0100