CS8406-CS datasheet(34/43 Pages) CIRRUS

34 / 43 page

CS8406

DS580F1

11.PIN DESCRIPTION - HARDWARE 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. Hardware mode provides an alternate

mode of operation, and access to CS and U data is provided by dedicated pins. To select Hardware

mode, this pin should be permanently tied to VL.

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 HWCK[1:0] pins.

ISCLK

Serial Audio Bit Clock (

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

ILRCK

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.

SFMT0

SFMT1

Serial Audio Data Format Select (

Input) - Selects the serial audio input port format. See Table 3 on

page 33.

COPY / C

ORIG

TEST

HWCK1

EMPH

TXP

SFMT0

TXN

SFMT1

H/S

TEST

GND

TEST

OMCK

RST

HWCK0

APMS

AUDIO

TCBLD

ILRCK

ISCLK

CEN

SDIN

TCBL

821

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