WM1811A datasheet(123/328 Pages) WOLFSON

123 / 328 page

Production Data

WM1811A

PD, November 2013, Rev 4.1

123

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

1:0

DCS_STARTUP_C

OMPLETE [1:0]

DC Servo Start-Up status

0 = Start-Up DC Servo mode not

completed.

1 = Start-Up DC Servo mode

complete.

Bit [1] = HPOUT1R

Bit [0] = HPOUT1L

R89 (0059h)

DC Servo (4)

15:8

DCS_DAC_WR_VA

L_1 [7:0]

00h

Writing to this field sets the DC

Offset value for HPOUT1R in

DAC Write DC Servo mode.

Reading this field gives the

current DC Offset value for

HPOUT1R.

Two’s complement format.

LSB is 0.25mV.

Range is -32mV to +31.75mV

7:0

DCS_DAC_WR_VA

L_0 [7:0]

00h

Writing to this field sets the DC

Offset value for HPOUT1L in

DAC Write DC Servo mode.

Reading this field gives the

current DC Offset value for

HPOUT1L.

Two’s complement format.

LSB is 0.25mV.

Range is -32mV to +31.75mV

Table 70 DC Servo Control

GPIO / INTERRUPT OUTPUTS FROM DC SERVO

When using the DC Servo Start-Up or DAC Write modes, the DCS_CAL_COMPLETE register

provides readback of the status of the DC offset correction. This can be read from register R88 as

described in Table 70.

The DCS_CAL_COMPLETE bits can also be used as inputs to the Interrupt control circuit and used to

trigger an Interrupt event - see “Interrupts”.

The DCS_CAL_COMPLETE bits can also be used as inputs to the GPIO function and used to

generate external logic signals indicating the DC Servo status. See “General Purpose Input/Output”

for details of how to configure a GPIO pin to output the DC Servo status.

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