18.1.4 Register Configuration
The 20-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
Area 7
Access
Size
Name
Abbreviation R/W Initial Value* P4 Address Address
Port control register A PCTRA
R/W H'00000000 H'FF80002C H'1F80002C 32
R/W Undefined H'FF800030 H'1F800030 16
R/W H'00000000 H'FF800040 H'1F800040 32
R/W Undefined H'FF800044 H'1F800044 16
R/W H'00000000 H'FF800048 H'1F800048 16
Port data register A
Port control register B PCTRB
Port data register B PDTRB
PDTRA
GPIO interrupt control GPIOIC
register
Serial port register
Serial port register
SCSPTR1
SCSPTR2
R/W Undefined
R/W Undefined
H'FFE0001C H'1FE0001C 8
H'FFE80020 H'1FE80020 16
Note: * Initialized by a power-on reset.
Rev. 6.0, 07/02, page 741 of 986
RENESAS [ RENESAS TECHNOLOGY CORP ]
