WM8903 datasheet(162/178 Pages) WOLFSON

162 / 178 page

WM8903

Production Data

PD, Rev 4.5, June 2012

162

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

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

R111 (6Fh)

Write

Sequencer 3

WSEQ_ABORT

Writing a 1 to this bit aborts the current

sequence and returns control of the device

back to the serial control interface.

(Write-Only Register)

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.

(Write-Only Register)

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

R112 (70h)

Write

Sequencer 4

9:4

WSEQ_CURRENT_INDEX

[5:0]

00_0000

Sequence Current Index. This is the

location of the most recently accessed

command in the write sequencer memory.

(Read-Only Register)

WSEQ_BUSY

Sequencer Busy flag

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.

(Read-Only Register)

WM8903 Datasheet(PDF) 162 Page - Wolfson Microelectronics plc

WM8903 Datasheet(HTML) 162 Page - Wolfson Microelectronics plc

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