WM8912 datasheet(115/129 Pages) CIRRUS

115 / 129 page

Production Data

WM8912

PD, Rev 4.1, February 2013

115

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R110 (6Eh)

Write

Sequencer 2

WSEQ_EOS

End of Sequence flag. This bit indicates whether the

Control Write Sequencer should stop after executing

this step.

0 = Not end of sequence

1 = End of sequence (Stop the sequencer after this

step).

11:8

WSEQ_DELAY

[3:0]

0000

Time delay after executing this step.

Total delay time per step (including execution)=

62.5µs × (2^WSEQ_DELAY + 8)

7:0

WSEQ_DATA

[7:0]

0000_0000 Data to be written in this sequence step. When the data

width is less than 8 bits, then one or more of the MSBs

of WSEQ_DATA are ignored. It is recommended that

unused bits be set to 0.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R111 (6Fh)

Write

Sequencer 3

WSEQ_ABOR

Writing a 1 to this bit aborts the current sequence and

returns control of the device back to the serial control

interface.

WSEQ_START

Writing a 1 to this bit starts the write sequencer at the

memory location indicated by the

WSEQ_START_INDEX field. The sequence continues

until it reaches an “End of sequence” flag. At the end of

the sequence, this bit will be reset by the Write

Sequencer.

5:0

WSEQ_START

_INDEX [5:0]

00_0000

Sequence Start Index. This is the memory location of

the first command in the selected sequence.

0 to 31 = RAM addresses

32 to 48 = ROM addresses

49 to 63 = Reserved

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R112 (70h)

Write

Sequencer 4

9:4

WSEQ_CURR

ENT_INDEX

[5:0]

00_0000

Sequence Current Index (read only):

This is the location of the most recently accessed

command in the write sequencer memory.

WSEQ_BUSY

Sequencer Busy flag (read only):

0 = Sequencer idle

1 = Sequencer busy

Note: it is not possible to write to control registers via

the control interface while the Sequencer is Busy.

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