WM8326 datasheet(99/255 Pages) WOLFSON

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Production Data

WM8326

PD, June 2012, Rev 4.0

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

5:0

AUX_RATE [5:0]

00_0000

AUXADC Conversion Rate

0 = Manual

1 = 2 samples/s

2 = 4 samples/s

3 = 6 samples/s

…

31 = 62 samples/s

32 = Reserved

33 = 16 samples/s

34 = 32 samples/s

35 = 48 samples/s

…

63 = 496 samples/s

R16431

(402Fh)

AuxADC

Source

AUX_PVDD_SEL

AUXADC PVDD input select

0 = Disable PVDD measurement

1 = Enable PVDD measurement

AUX_CHIP_TEM

P_SEL

AUXADC Chip Temp input select

0 = Disable Chip Temp measurement

1 = Enable Chip Temp measurement

AUX_GPIO12_SE

AUXADC GPIO12 input select

0 = Disable GPIO12 measurement

1 = Enable GPIO12 measurement

AUX_GPIO11_SE

AUXADC GPIO11 input select

0 = Disable GPIO11 measurement

1 = Enable GPIO11 measurement

AUX_GPIO10_SE

AUXADC GPIO10 input select

0 = Disable GPIO10 measurement

1 = Enable GPIO10 measurement

Table 45 AUXADC Control

18.3 AUXADC READBACK

Measured data from the AUXADC is read via the AuxADC Data Register (R16429), which contains

two fields. The AUXADC Data Source is indicated in the AUX_DATA_SRC field; the associated

measurement data is contained in the AUX_DATA field.

Reading from the AuxADC Data Register returns a 12-bit code which represents the most recent

AUXADC measurement on the associated channel. It should be noted that every time an AUXADC

measurement is written to the AuxADC Data Register, the previous data is overwritten - the host

processor should ensure that data is read from this register before it is overwritten. The AUXADC

interrupts can be used to indicate when new data is available - see Section 18.5.

The 12-bit AUX_DATA field can be equated to the actual voltage (or temperature) according to the

following equations, where AUX_DATA is regarded as an unsigned integer:

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