SH7206 Datasheet, PDF (985/1188 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 20 I/O Ports
20.5.2 Port D Data Registers H, L (PDDRH, PDDRL)
PDDRH and PDDRL are 16-bit readable/writable registers that store port D data. Bits PD31DR to
PD8DR correspond to pins PD31/D31/ADTRG/TIOC3AS to PD8/D8/TIOC3AS, respectively.
When a pin function is general output, if a value is written to PDDRH or PDDRL, that value is
output directly from the pin, and if PDDRH or PDDRL is read, the register value is returned
directly regardless of the pin state.
When a pin function is general input, if PDDRH or PDDRL is read, the pin state, not the register
value, is returned directly. If a value is written to PDDRH or PDDRL, although that value is
written into PDDRH or PDDRL, it does not affect the pin state. Table 20.8 summarizes PDDRH
and PDDRL read/write operations.
PDDRH and PDDRL are initialized to the respective values shown in table 20.7 by a power-on
reset. PDDRH and PDDRL are not initialized by a manual reset or in sleep mode or software
standby mode.
Rev. 3.00 Jun. 18, 2008 Page 961 of 1160
REJ09B0191-0300