WM8311 datasheet(236/302 Pages) WOLFSON

236 / 302 page

WM8311

Pre-Production

PP, May 2012, Rev 3.1

236

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R16462

(404Eh)

Current Sink

CS1_ENA

Current Sink 1 Enable (ISINK1 pin)

0 = Disabled

1 = Enabled

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

entered.

CS1_DRIVE

Current Sink 1 output drive enable

0 = Disabled

1 = Enabled

CS1_STS

Current Sink 1 status

0 = Normal

1 = Sink current cannot be regulated

CS1_SLPENA

Current Sink 1 SLEEP Enable

0 = Disabled

1 = Controlled by CS1_ENA

11:10

CS1_OFF_RA

MP [1:0]

ISINK1 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

CS1_ON_RAM

P [1:0]

ISINK1 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

CS1_ISEL [5:0]

00_0000

ISINK1 current.

Current = 2.0µA × 2^(CS1_ISEL/4), where CS1_ISEL is

an unsigned binary number.

Alternatively,

CS1_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) 236 Page - Wolfson Microelectronics plc

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