Cirrus-logic CS8406 User Manual download pdf (Page 25)

DS580F6 25

CS8406

9. PIN DESCRIPTION - SOFTWARE MODE

VD 6 Digital Power (Input) - Digital core power supply. Typically +3.3 V or +5.0 V.

VL 23 Logic Power (Input) - Input/Output power supply. Typically +3.3 V or +5.0 V.

GND 22 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 21 Master Clock (Input) - The frequency can be set through the control port registers.

ISCLK 13 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 14 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

VD VL

TEST GND

TEST OMCK

RST U

TEST INT

TEST TEST

ILRCK TEST

ISCLK TEST

SDIN TCBL

821

12 17

14 15

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 38 39

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Cirrus-logic CS8406 User Manual Page 25

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