WM8311 datasheet(237/302 Pages) WOLFSON

237 / 302 page

Pre-Production

WM8311

PP, May 2012, Rev 3.1

237

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R16463

(404Fh)

Current Sink

CS2_ENA

Current Sink 2 Enable (ISINK2 pin)

0 = Disabled

1 = Enabled

Note - this bit is reset to 0 when the OFF power state is

entered.

CS2_DRIVE

Current Sink 2 output drive enable

0 = Disabled

1 = Enabled

CS2_STS

Current Sink 2 status

0 = Normal

1 = Sink current cannot be regulated

CS2_SLPENA

Current Sink 2 SLEEP Enable

0 = Disabled

1 = Controlled by CS2_ENA

11:10

CS2_OFF_RA

MP [1:0]

ISINK2 Switch-Off ramp

00 = instant (no ramp)

01 = 1 step every 4ms (220ms)

10 = 1 step every 8ms (440ms)

11 = 1 step every 16ms (880ms)

The time quoted in brackets is valid for the maximum

change in current drive setting. The actual time scales

according to the extent of the change in current drive

setting.

9:8

CS2_ON_RAM

P [1:0]

ISINK2 Switch-On ramp

00 = instant (no ramp)

01 = 1 step every 4ms (220ms)

10 = 1 step every 8ms (440ms)

11 = 1 step every 16ms (880ms)

The time quoted in brackets is valid for the maximum

change in current drive setting. The actual time scales

according to the extent of the change in current drive

setting.

5:0

CS2_ISEL [5:0]

00_0000

ISINK2 current.

Current = 2.0µA × 2^(CS2_ISEL/4), where CS2_ISEL is

an unsigned binary number.

Alternatively,

CS2_ISEL = 13.29 x LOG(current/2.0µA)

00_0000 = 2.0µA

11_0111 = 27.6mA

Values greater than 11_0111 will result in the maximum

current of approx 27.6mA.

WM8311 Datasheet(PDF) 237 Page - Wolfson Microelectronics plc

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