WM8351 datasheet(104/330 Pages) WOLFSON

104 / 330 page

WM8351

Production Data

PD, April 2012, Rev 4.5

104

13.12.6 ZERO CROSS TIMEOUT

A zero-cross timeout function is also provided so that if zero cross is enabled on the input or output

PGAs the gain will automatically update after a timeout period if a zero cross has not occurred.

The zero-cross timeout function requires the internal slow clock to be enabled - see Section 12.3.6.

13.12.7 INTERRUPTS AND FAULT PROTECTION

The CODEC has its own first-level interrupt, CODEC_INT (see Section 24). This comprises four

second-level interrupts which indicate Jack detect and Microphone current conditions. These

interrupts can be individually masked by setting the applicable mask bit(s) as described in Table 54.

ADDRESS

BIT

LABEL

DESCRIPTION

R31 (1Fh)

Comparator

Interrupt Status

CODEC_JCK_DET_L_EINT

Left channel Jack detection interrupt.

(Rising and Falling Edge triggered)

Note: This bit is cleared once read.

CODEC_JCK_DET_R_EINT

Right channel Jack detection interrupt.

(Rising and Falling Edge triggered)

Note: This bit is cleared once read.

CODEC_MICSCD_EINT

Mic short-circuit detect interrupt.

(Rising and Falling Edge triggered)

Note: This bit is cleared once read.

CODEC_MICD_EINT

Mic detect interrupt.

(Rising and Falling Edge triggered)

Note: This bit is cleared once read.

R39 (27h)

Comparator

Interrupt Status

Mask

11:8

“IM_” + name of respective bit

in R31

Interrupt mask.

0 = Do not mask interrupt.

1 = Mask interrupt.

Each bit in R39 enables or masks the

corresponding bit in R31. The default

value for these bits is 0 (unmasked).

Table 54 CODEC Interrupts

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