WM8993 datasheet(201/229 Pages) WOLFSON

201 / 229 page

Production Data

WM8993

PD, November 2010, Rev 4.0

201

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R71 (47h)

Write

Sequencer 1

14:12

WSEQ_DATA_

WIDTH [2:0]

000

Width of the data block written in this sequence step.

000 = 1 bit

001 = 2 bits

010 = 3 bits

011 = 4 bits

100 = 5 bits

101 = 6 bits

110 = 7 bits

111 = 8 bits

11:8

WSEQ_DATA_

START [3:0]

0000

Bit position of the LSB of the data block written in this

sequence step.

0000 = Bit 0

…

1111 = Bit 15

7:0

WSEQ_ADDR

[7:0]

0000_0000 Control Register Address to be written to in this

sequence step.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R72 (48h)

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 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

R73 (49h)

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 58 = ROM addresses

59 to 63 = Reserved

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