SH7721 datasheet(1113/1524 Pages) RENESAS

1113 / 1524 page

Section 31

MultiMediaCard Interface (MMCIF)

Rev. 3.00 Jan. 18, 2008 Page 1051 of 1458

REJ09B0033-0300

• INTSTR1

Bit

Bit Name

Initial

Value

R/W

Description

7 to 4



All 0



Reserved

These bits are always read as 0. The write value should

always be 0.

WRERI

R/(W)*

Write Error Flag

[Setting condition]

When a status error for transmit data response (write

error) is detected while WREIE = 1.

[Clearing condition]

Write 0 after reading WREI = 1.

Note:

When the write error occurs, halt the command

sequence by setting the CMDOFF bit to 1.

CRCERI

R/(W)*

CRC Error Flag

[Setting condition]

When a CRC error for command response or receive

data, and CRC status error for transmission data

response are detected while CRCERIE = 1.

For any non-R2 command response, CRC is checked

when the RTY4 in RSPTYR is set for enabling.

For the R2 command response, CRC is not checked;

therefore, this flag is not set.

[Clearing condition]

Write 0 after reading CRCERI = 1.

Note:

When the CRC error occurs, halt the command

sequence by setting the CMDOFF bit to 1.

DTERI

R/(W)*

Data Timeout Error Flag

[Setting condition]

When a data timeout error specified in DTOUTR occurs

while DTERIE = 1.

[Clearing condition]

Write 0 after reading DTERI = 1.

Note:

When the data timeout error occurs, clear the

DTERI flag after halting the command sequence

by setting the CMDOFF bit to 1.

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