SH7721 datasheet(1031/1524 Pages) RENESAS

1031 / 1524 page

Section 29

PC Card Controller (PCC)

Rev. 3.00 Jan. 18, 2008 Page 969 of 1458

REJ09B0033-0300

29.3.3

Area 6 Card Status Change Register (PCC0CSCR)

PCC0CSCR is an 8-bit readable/writable able register. PCC0CSCR bits are set to 1 by interrupt

sources of the PC card connected to area 6 (only bit 7 can be set to 1 as required). PCC0CSCR is

initialized by a power-on reset but retains its value in a manual reset and in software standby

mode.

Bit

Bit Name

Initial Value

R/W

Description

P0SCDI

R/W

PCC0 Software Card Detect Change Interrupt

A PCC0 software card detect change interrupt can be generated

by writing 1 to this bit. When this bit is set to 1, the same interrupt

as the PCC0 card detect change interrupt (bit 3 set status) occurs

if bit 3 (PCC0 card detect change enable) in the area 6 card

status change interrupt enable register (PCC0CSCIER) is set to

1. If bit 3 is cleared to 0, no interrupt occurs.

0: No software card detect change interrupt occurs for the PC

card connected to area 6

1: Software card detect change interrupt occurs for the PC card

connected to area 6



Reserved

This bit is always read as 0. The write value should always be 0.

P0IREQ

R/W

PCC0IREQ Request

Indicates the interrupt request for the

IREQ pin of the PC card

when the PC card connected to area 6 is the I/O card interface

type. The P0IREQ bit is set to 1 when an interrupt request signal

in pulse mode or level mode is input to the

IREQ. The mode is

selected by bits 5 and 6 (PCC0IREQ interrupt enable bits) in the

area 6 card status change interrupt enable register

(PCC0CSCIER). This bit can be cleared to 0 only in pulse mode.

Write 0 to bit 5 to clear the bit to 0. This bit is not changed if 1 is

written. In level mode, bit 5 is a read-only bit, which reflects the

IREQ state (if the IREQ is low, 1 is read). This bit always reads 0

on the IC memory card interface.

0: No interrupt request on the

IREQ of the PC card when the PC

card is on the I/O card interface

1: An interrupt request on the

IREQ of the PC card has occurred

when the PC card is on the I/O card interface

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