WM8311 datasheet(69/302 Pages) WOLFSON

69 / 302 page

Pre-Production

WM8311

PP, May 2012, Rev 3.1

14.6.5 DCRW PAGE 4

Page 4 of the DCRW occupies register addresses R30752 (7820h) to R30759 (7827h).

This page of data is loaded from the third page of ICE memory (20h to 2Fh) when ‘ON’ state transition

is scheduled in Development Mode. This page of data can also be loaded from ICE using the ICE

Read command. Note that ICE Address 20h corresponds to bits 15:8 at the start address of DCRW

Page 4; ICE Address 21h corresponds to bits 7:0 at the same DCRW address.

The ICE_VALID_DATA register is used to hold a validation field for the ICE data contents. If the

WM8311 configuration data is loaded from the external ICE in response to an ‘ON’ state transition

request in Development Mode, then the ICE_VALID_DATA field is checked to confirm valid ICE data.

The ICE data is deemed valid if the ICE_VALID_DATA field contains the value A596h. If the ICE is

not connected or contains invalid data, then the WM8311 remains in the OFF power state until a

Device Reset.

The ICE_VALID_DATA register is defined in Table 32.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R30759 (7827h)

ICE CHECK

DATA

15:0

ICE_VALID_

DATA [15:0]

0000h

This field is checked in development

mode when an ‘ON’ transition is

requested. A value of A596h is required

to confirm valid data.

Table 32 ICE Registers - DCRW Page 5

WM8311 Datasheet(PDF) 69 Page - Wolfson Microelectronics plc