SH7261 datasheet(815/1348 Pages) RENESAS

815 / 1348 page

Section 18 Serial Sound Interface (SSI)

Rev. 2.00 Sep. 07, 2007 Page 783 of 1312

REJ09B0320-0200

Bit

Bit Name

Initial

Value

R/W

Description

OIRQ

R/W*

Overflow Error Interrupt Status Flag

This status flag indicates that data was supplied at a

higher rate than was required.

In either case this bit is set to 1 regardless of the value

of the OIEN bit and can be cleared by writing 0 to this

bit.

If OIRQ = 1 and OIEN = 1, an interrupt occurs.

• TRMD = 0 (Receive mode)

If OIRQ = 1, SSIRDR was not read before there

was new unread data written to it. This will lead to

the loss of a sample and a potential corruption of

multi-channel data.

Note: When an overflow error occurs, the current data

in the data buffer of this module is overwritten by

the next incoming data from the SSI interface.

• TRMD = 1 (Transmit mode)

If OIRQ = 1, SSITDR had data written to it before it

was transferred to the shift register. This will lead to

the loss of a sample and a potential corruption of

multi-channel data.

IIRQ

Idle Mode Interrupt Status Flag

This interrupt status flag indicates whether the SSI

module is in idle state.

This bit is set regardless of the value of the IIEN bit to

allow polling.

The interrupt can be masked by clearing IIEN, but

cannot be cleared by writing to this bit.

If IIRQ = 1 and IIEN = 1, an interrupt occurs.

0: The SSI module is not in idle state.

1: The SSI module is in idle state.

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