CS8406-CSZ datasheet(25/39 Pages) CIRRUS

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DS580F6

CS8406

9. PIN DESCRIPTION - SOFTWARE MODE

Digital Power (Input) - Digital core power supply. Typically +3.3 V or +5.0 V.

Logic Power (Input) - Input/Output power supply. Typically +3.3 V or +5.0 V.

GND

Ground (Input) - Ground for I/O and core logic.

RST

Reset (Input) - When RST is low, the CS8406 enters a low power mode and all internal states are reset.

On initial power up, RST must be held low until the power supply is stable, and all input clocks are stable

in frequency and phase. This is particularly true in Hardware Mode with multiple CS8406 devices, where

synchronization between devices is important.

H/S

Hardware/Software Control Mode Select (Input) -Determines the method of controlling the operation

of the CS8406, and the method of accessing CS and U data. In Software Mode, device control and CS

and U data access is primarily through the control port, using a microcontroller. To select Software

Mode, this pin should be permanently tied to GND.

TXN

TXP

Differential Line Drivers (Output) - These pins transmit biphase encoded data. The drivers are pulled

low while the CS8406 is in the reset state.

OMCK

Master Clock (Input) - The frequency can be set through the control port registers.

ISCLK

Serial Audio Bit Clock (Input/Output) - Serial bit clock for audio data on the SDIN pin.

ILRCK

12 Serial Audio Input Left/Right Clock (

Input

/Output) - Word rate clock for the audio data on the SDIN

pin.

SDIN

Serial Audio Data Port (Input) - Audio data serial input pin.

SDA / CDOUT

SCL / CCLK

AD0 / CS

AD1 / CDIN

AD2

TXP

RXP

TXN

TSTN

H/S

TEST

GND

TEST

OMCK

RST

TEST

INT

TEST

ILRCK

TEST

ISCLK

TEST

SDIN

TCBL

821

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