WM8994ECSSLASHR datasheet(245/363 Pages) CIRRUS

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WM8994

Rev 4.6

245

SOFTWARE RESET AND DEVICE ID

The device ID can be read back from register R0. Writing to this register will reset the device.

The software reset causes most control registers to be reset to their default state. Note that the

Control Write Sequencer registers R12288 (3000h) through to R12799 (31FFh) are not affected by a

software reset; the Control Sequences defined in these registers are retained unchanged.

The status of the WM8994 digital I/O pins following a software reset is described in Table 141.

The device revision can be read back from register R256.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R0 (0000h)

Software

Reset

15:0

SW_RESET

[15:0]

8994h

Writing to this register resets all registers

to their default state. (Note - Control

Write Sequencer registers are not

affected by Software Reset.)

Reading from this register will indicate

device family ID 8994h.

R256

(0100h)

Chip

Revision

3:0

CHIP_REV [3:0]

Chip revision

Table 144 Chip Reset and ID

WM8994ECS/R 数据表(PDF) 245 Page - Cirrus Logic

WM8994ECS/R 数据表(HTML) 245 Page - Cirrus Logic

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