CS5535 datasheet(237/555 Pages) NSC

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ACC Register Descriptions (Continued)

5.3.2.2

Codec GPIO Control Register (ACC_GPIO_CNTL)

ACC_GPIO_STATUS Bit Descriptions

Bit

Name

Description

GPIO_EN

GPIO Enable. This bit determines if the codec GPIO pin data is sent out in slot 12 of

the serial output stream.

0: Send 0s and tag slot 12 as invalid.

1: Send GPIO pin data and tag slot valid.

INT_EN

Codec GPIO Interrupt Enable. Allow a codec GPIO interrupt to set the codec GPIO

interrupt flag and generate an IRQ.

0: Disable.

1: Enable.

A GPIO interrupt is defined by serial data in slot 12, bit 0

WU_INT_EN

Codec GPIO Wakeup Interrupt Enable. Allow a codec GPIO wakeup interrupt to set

the codec GPIO wakeup interrupt flag and generate an IRQ.

0: Disable.

1: Enable.

A codec GPIO wakeup interrupt is defined as a 0-to-1 transition of AC_S_IN or

AC_S_IN2 while the codec is powered down. This bit can only be set after the codec(s)

are powered down (See Audio Driver Power-up/down Programming Model on

page 90).

28:22

RSVD

Reserved. Reads return 0.

INT_FLAG

Codec GPIO Interrupt Flag (Read to Clear). If the GPIO interrupt is enabled (bit 30 =

1) then this flag is set upon a codec GPIO interrupt event (serial data in slot 12, bit 0 =

1), and an IRQ is generated.

WU_INT_FLAG

Codec GPIO Wakeup Interrupt Flag (Read to Clear). If the GPIO wakeup interrupt is

enabled (bit 29 = 1), then this flag is set when a GPIO wakeup interrupt occurs, and an

IRQ is generated.

19:0

PIN_STS

Codec GPIO Pin Status (Read Only). This is the GPIO pin status that is received from

the codec in slot 12 of the serial input stream. This is updated every time slot 12 of the

input stream is tagged valid.

Note:

All 20 bits of input slot 12 are visible in this register, including reserved bits

within slot 12.

ACC I/O Offset

04h

Type

R/W

Reset Value

00000000h

ACC_GPIO_CNTL Register Map

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

9876543210

RSVD

PIN_DATA

ACC_GPIO_CNTL Bit Descriptions

Bit

Name

Description

31:20

RSVD

Reserved. Reads return 0.

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