WM8321 datasheet(113/253 Pages) WOLFSON

113 / 253 page

Production Data

WM8321

PD, February 2012, Rev 4.0

113

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R16450

(4042h)

GPIO11

Control

GP11_PWR_D

GPIO11 Power Domain select

0 = DBVDD

1 = PVDD

R16451

(4043h)

GPIO12

Control

GP12_PWR_D

GPIO12 Power Domain select

0 = DBVDD

1 = PVDD

Table 56 GPIO Power Domain Registers

The function of each GPIO is controlled using the GPn_FN registers defined in Table 57. Note that

the selected function also depends on the associated GPn_DIR field described in Table 54.

See also Section 21.2 for additional details of each GPIO function, including the applicable de-bounce

times for GPIO input functions.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R16440

(4038h)

GPIO1 Control

3:0

GP1_FN [3:0]

0000

Input functions:

0h = GPIO input (long de-bounce)

1h = GPIO input

2h = Power On/Off request

3h = Sleep/Wake request

4h = Sleep/Wake request (long de-

bounce)

5h = Sleep request

6h = Power On request

7h = Watchdog Reset input

8h = DVS1 input

9h = DVS2 input

Ah = HW Enable1 input

Bh = HW Enable2 input

Ch = HW Control1 input

Dh = HW Control2 input

Eh = HW Control1 input (long de-

bounce)

Fh = HW Control2 input (long de-

bounce)

Output functions:

0h = GPIO output

1h = 32.768kHz oscillator output

2h = ON state

3h = SLEEP state

4h = Power State Change

5h = Reserved

6h = Reserved

7h = Reserved

8h = DC1 DVS Done

9h = DC2 DVS Done

Ah = External Power Enable1

Bh = External Power Enable2

Ch = System Supply Good (SYSOK)

Dh = Converter Power Good

(PWR_GOOD)

Eh = External Power Clock (2MHz)

Fh = Auxiliary Reset

R16441

(4039h)

GPIO2 Control

3:0

GP2_FN [3:0]

0000

R16442

(403Ah)

GPIO3 Control

3:0

GP3_FN [3:0]

0000

R16443

(403Bh)

GPIO4 Control

3:0

GP4_FN [3:0]

0000

R16444

(403Ch)

GPIO5 Control

3:0

GP5_FN [3:0]

0000

R16445

(403Dh)

GPIO6 Control

3:0

GP6_FN [3:0]

0000

R16446

(403Eh)

GPIO7 Control

3:0

GP7_FN [3:0]

0000

R16447

(403Fh)

GPIO8 Control

3:0

GP8_FN [3:0]

0000

R16448

(4040h)

GPIO9 Control

3:0

GP9_FN [3:0]

0000

R16449

(4041h)

GPIO10

Control

3:0

GP10_FN [3:0]

0000

R16450

(4042h)

GPIO11

Control

3:0

GP11_FN [3:0]

0000

R16451

(4043h)

GPIO12

Control

3:0

GP12_FN [3:0]

0000

Table 57 GPIO Function Select Registers

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