WM8321 datasheet(114/253 Pages) WOLFSON

114 / 253 page

WM8321

Production Data

PD, February 2012, Rev 4.0

114

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.

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 58.

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 12 that identifies the individual GPIO.

Table 58 GPIO Interrupts

WM8321 数据表(PDF) 114 Page - Wolfson Microelectronics plc

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