Register Configuration; Table 18.4 I/O Port Registers - Hitachi SH7751 Hardware Manual

18.1.4

Register Configuration

The 32-bit general-purpose I/O port, SCI I/O port, and SCIF I/O port have seven registers, as
shown in table 18.4.

Table 18.4 I/O Port Registers

Name
Port control register A
Port data register A
Port control register B
Port data register B
GPIO interrupt control
register
Serial port register
Serial port register
Note: * Initialized by a power-on reset.
Rev. 3.0, 04/02, page 718 of 1064
Abbreviation R/W
PCTRA R/W
PDTRA R/W
PCTRB R/W
PDTRB R/W
GPIOIC R/W
SCSPTR1 R/W
SCSPTR2 R/W
Initial Value* P4 Address
H'00000000 H'FF80002C H'1F80002C 32
Undefined H'FF800030
H'00000000 H'FF800040
Undefined H'FF800044
H'00000000 H'FF800048
Undefined H'FFE0001C H'1FE0001C 8
Undefined H'FFE80020 H'1FE80020 16
Area 7 Access
Address Size
H'1F800030 16
H'1F800040 32
H'1F800044 16
H'1F800048 16