WM8311 datasheet(150/302 Pages) WOLFSON

150 / 302 page

WM8311

Pre-Production

PP, May 2012, Rev 3.1

150

22.2.4 MANUAL MODE

Setting LEDn_SRC = 11 configures the associated LED to operate in Manual Mode, which is further

configurable using additional register fields.

In Manual Mode, the LED output can be commanded as Off, On (Constant), Continuous Pulsed or

Pulsed Sequence. The selected operation is determined by the LEDn_MODE registers as described

in Table 88.

In Continuous Pulsed mode and Pulsed Sequence mode, the ‘On’ time and the Duty Cycle can be

configured using the LEDn_DUR and LEDn_DUTY_CYC registers respectively.

In Pulsed Sequence mode, the number of pulses in the sequence can be selected using the

LEDn_SEQ_LEN register. On completion of the commanded number of pulses, the LED remains off

until LEDn_MODE or LEDn_SRC is changed to another value.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R16460

(404Ch)

Status LED1

9:8

LED1_MODE

[1:0]

LED1 Mode

(Controls LED1 in Manual Mode

only.)

00 = Off

01 = Constant

10 = Continuous Pulsed

11 = Pulsed Sequence

5:4

LED1_SEQ_LE

N [1:0]

LED1 Pulse Sequence Length

(when LED1_MODE = Pulsed

Sequence)

00 = 1 pulse

01 = 2 pulses

10 = 4 pulses

11 = 7 pulses

3:2

LED1_DUR

[1:0]

LED1 On time

(when LED1_MODE = Continuous

Pulsed or Pulsed Sequence)

00 = 1 second

01 = 250ms

10 = 125ms

11 = 62.5ms

1:0

LED1_DUTY_C

YC [1:0]

LED1 Duty Cycle (On:Off ratio)

(when LED1_MODE = Continuous

Pulsed or Pulsed Sequence)

00 = 1:1 (50% on)

01 = 1:2:(33.3% on)

10 = 1:3 (25% on)

11 = 1:7 (12.5% on)

R16461

(404Dh)

Status LED2

9:8

LED2_MODE

[1:0]

LED2 Mode

(Controls LED2 in Manual Mode

only.)

00 = Off

01 = Constant

10 = Continuous Pulsed

11 = Pulsed Sequence

5:4

LED2_SEQ_LE

N [1:0]

LED2 Pulse Sequence Length

(when LED2_MODE = Pulsed

Sequence)

00 = 1 pulse

01 = 2 pulses

10 = 4 pulses

11 = 7 pulses

WM8311 Datasheet(PDF) 150 Page - Wolfson Microelectronics plc

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