CS8416-CS datasheet(22/48 Pages) CIRRUS

22 / 48 page

CS8416

DS578PP2

6.3

General Purpose Outputs

Three General Purpose outputs are provided to allow the equipment designer flexibility in configuring the

CS8416.

Fourteen signals are available to be routed to the GPOs.

GPO pins may be configured to provide the following data:

Notes: 13. Frequency = 25 MHz Max, duty cycle not guaranteed, target duty cycle = 50% @ FS =48kHz.

6.4

Interrupts

The CS8416 has a comprehensive interrupt capa-

bility. The INT pin may be set to be active low, ac-

tive high or active low with no active pull-up

transistor. This last mode is used for active low,

wired-OR hook- ups, with multiple peripherals

connected to the microcontroller interrupt input

pin.

Many conditions can cause an interrupt, as listed in

the interrupt status register descriptions. Each

source may be masked off through mask register

bits. In addition, each source may be set to rising

edge, falling edge, or level sensitive. Combined

with the option of level sensitive or edge sensitive

modes within the microcontroller, many different

configurations are possible, depending on the

needs of the equipment designer.

Function

Code

Definition

0000

AES/SPDIF input selected by TXSEL[2:0]

EMPH

0001

State of EMPH bit in incoming stream. Same polarity as EMPHb bit.

INT

0010

CS8416 interrupt

0011

Channel status bit

0100

User data bit

RERR

0101

Receiver Error

NVERR

0110

Non-Validity Receiver Error

RCBL

0111

Receiver Channel Status Block

96KHZ

1000

Input FS ≥ 88.1

AUDIO

1001

Non-audio indicator for decoded input stream

VLRCK

1010

Virtual LRCK

GND

1011

Fixed low Level

VDD

1100

VDD fixed high level

HRMCK

1101

FS X 512 (Note 13)

Codes 1110 to 1111 - Reserved

Table 3. GPO Pin Configurations

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