WM8281ECSSLASHR datasheet(229/392 Pages) CIRRUS

Il numero della parte	WM8281ECS/R

Spiegazioni elettronici	Low Power Audio System with Ambient Noise Cancellation and Echo Cancellation

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Produttore elettronici	CIRRUS [Cirrus Logic]

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WM8281

Rev 4.0

229

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R3072

(0C00h)

GPIO1 CTRL

R3076

(0C04h)

GPIO5 CTRL

GPn_DIR

GPIOn Pin Direction

0 = Output

1 = Input

GPn_PU

GPIOn Pull-Up Enable

0 = Disabled

1 = Enabled

GPn_PD

GPIOn Pull-Down Enable

0 = Disabled

1 = Enabled

GPn_LVL

GPIOn level. Write to this bit to set

a GPIO output. Read from this bit to

read GPIO input level.

For output functions only, when

GPn_POL is set, the register is the

opposite logic level to the external

pin.

Note that the GPn_LVL register is

‘write only’ when GPn_DIR=0.

GPn_POL

GPIOn Output Polarity Select

0 = Non-inverted (Active High)

1 = Inverted (Active Low)

GPn_OP_CFG

GPIOn Output Configuration

0 = CMOS

1 = Open Drain

GPn_DB

GPIOn Input De-bounce

0 = Disabled

1 = Enabled

6:0

GPn_FN [6:0]

01h

GPIOn Pin Function

(see Table 87 or Table 88 for

details)

R3088

(0C10h)

GPIO

Debounce

Config

15:12

GP_DBTIME

[3:0]

0001

GPIO Input de-bounce time

0h = 100us

1h = 1.5ms

2h = 3ms

3h = 6ms

4h = 12ms

5h = 24ms

6h = 48ms

7h = 96ms

8h = 192ms

9h = 384ms

Ah = 768ms

Bh to Fh = Reserved

Note: n is a number (1, 2, 3, 4 or 5) that identifies the individual GPIO.

Table 86 GPIO Control

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