CS8415A-CSZ datasheet(30/46 Pages) CIRRUS

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DS470F4

CS8415A

9. PIN DESCRIPTION - SOFTWARE MODE

Pin Name

Pin Description

SDA/CDOUT

Serial Control Data I/O (I²C) / Data Out (SPI) (Input/Output) - In I²C mode, SDA is the control I/O data

line. SDA is open drain and requires an external pull-up resistor to VL+. In SPI mode, CDOUT is the out-

put data from the control port interface on the CS8415A

AD0/CS

Address Bit 0 (I²C) / Control Port Chip Select (SPI) (Input) - A falling edge on this pin puts the

CS8415A into SPI control port mode. With no falling edge, the CS8415A defaults to I²C mode. In I²C

mode, AD0 is a chip address pin. In SPI mode, CS is used to enable the control port interface on the

CS8415A

EMPH

Pre-Emphasis (Output) - EMPH is low when the incoming Channel Status data indicates 50/15 ms

pre-emphasis.

EMPH is high when the Channel Status data indicates no pre-emphasis or indicates pre-

emphasis other than 50/15 ms. This is also a start-up option pin, and requires a 47 k

Ω resistor to either

VL+ or DGND, which determines the AD2 address bit for the control port in I²C mode

RXP0

RXN0

AES3/SPDIF Receiver Port (Input) - Differential line receiver inputs carrying AES3 data. RXP0 may be

used as a single-ended input as part of 7:1 S/PDIF Input MUX. If RXP0 is used in MUX, RXN0 must be

ac coupled to ground.

RXP1

RXP2

RXP3

RXP4

RXP5

RXP6

Additional AES3/SPDIF Receiver Port (Input) - Single-ended receiver inputs carrying AES3 or S/PDIF

digital data. These inputs, along with RXP0, comprise the 7:1 S/PDIF Input Multiplexer and select line

control is accessed using the MUX2:0 bits in the Control 2 register. Please note that any unused inputs

should be tied to ground. See Appendix A for recommended input circuits.

VA+

Positive Analog Power (Input) - Positive supply for the analog section. Nominally +5.0 V. This supply

should be as quiet as possible since noise on this pin will directly affect the jitter performance of the

recovered clock

SDA/CDOUT

AD0/CS

EMPH

RXP0

RXN0

VA+

AGND

FILT

RST

RMCK

RERR

RXP1

*24

*23

*22

*21

*18

*17

*16

3*+

10*

11*

SCL/CCLK

AD1/CDIN

H/S

V+

DGND

OMCK

INT

SDOUT

OLRCK

OSCLK

* Pins which remain the same function in all modes.

+ Pins which requireapulluporpulldown resistor

to select the desired startup option.

RXP2

RXP3

RXP4

RXP6

RXP5

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