WM8311 datasheet(147/302 Pages) WOLFSON

147 / 302 page

Pre-Production

WM8311

PP, May 2012, Rev 3.1

147

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

(4042h)

GPIO11

Control

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

R16451

(4043h)

GPIO12

Control

3:0

GP12_FN [3:0]

0000

R16452

(4044h)

GPIO13

Control

3:0

GP13_FN [3:0]

0000

R16453

(4045h)

GPIO14

Control

3:0

GP14_FN [3:0]

0000

R16454

(4046h)

GPIO15

Control

3:0

GP15_FN [3:0]

0000

R16455

(4047h)

GPIO16

Control

3:0

GP16_FN [4:0]

0000

Table 82 GPIO Function Select Registers

Note that GPIO input functions 2h, 3h, 4h, 5h and 6h are edge-triggered only. The associated state

transition(s) are scheduled only when a rising or falling edge is detected on the respective GPIO pin.

At other times, it is possible that other state transition events may cause a state transition regardless

of the state of the GPIO input. See Section 11.3 for details of all the state transition events.

Note that SLEEP transitions are not possible when any of the Battery Charger Interrupts is set. If any

of the Battery Charger Interrupts is asserted when a SLEEP transition is requested, then the transition

will be unsuccessful and the WM8311 will remain in the ON power state. See Section 17.7.8 for

details of the Battery Charger Interrupts.

21.4 GPIO INTERRUPTS

Each GPIO pin has an associated interrupt flag, GPn_EINT, in Register R16405 (4015h). Each of

these secondary interrupts triggers a primary GPIO Interrupt, GP_INT (see Section 23). This can be

masked by setting the mask bit(s) as described in Table 83.

See Section 28 and Section 29 for a definition of the register bit positions applicable to each GPIO.

ADDRESS

BIT

LABEL

DESCRIPTION

R16405

(4015h)

Interrupt Status

15:0

GPn_EINT

GPIO interrupt.

(Trigger is controlled by GPn_INT_MODE)

Note: Cleared when a ‘1’ is written.

R16413

(401Dh)

Interrupt Status

5 Mask

15:0

IM_GPn_EINT

Interrupt mask.

0 = Do not mask interrupt.

1 = Mask interrupt.

Default value is 1 (masked)

Note: n is a number between 1 and 16 that identifies the individual GPIO.

Table 83 GPIO Interrupts

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