CS4218 datasheet(17/44 Pages) CIRRUS

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SM3 and SM5 Subframe Bit Definitions for SDIN

Bit(s)

Symbol

Description

Bit(s)

Symbol

Description

1-16

DAC-LEFT

Audio Data, DAC Left

2’s Complement data,

MSB first (Bit 1 = MSB)

33-48

DAC-RIGHT

Audio Data, DAC Right

2’s Complement data,

MSB first (Bit 33 = MSB)

17-21

unused

Unused, write with 0’s

49,50

unused

Unused, write with 0’s

MUTE

Mute DAC Outputs

0 = Outputs ON

1 = Outputs MUTED

51 - 55

LA4 - LA0

Left Output Attenuation

1.5dB Increments.

00000 = no atten. (0dB)

11111 = 46.5dB atten.

ISL

Input Mux, Left Select

0 = LIN1

1 = LIN2

56 - 60

RA4 - RA0

Right Output Attenuation

1.5dB Increments.

00000 = no atten. (0dB)

11111 = 46.5dB atten.

ISR

Input Mux, Right Select

0 = RIN1

1 = RIN2

DO1

Digital Output 1

0 = Output LOW

1 = Output HIGH

25-28

LG3 - LG0

Left Input Gain

1.5dB Increments.

0000 = No gain (0dB)

1111 = 22.5 dB gain

DO2

Digital Output 2

0 = Output LOW

1 = Output HIGH

29-32

RG3 - RG0

Right Input Gain

1.5dB Increments.

0000 = No gain (0dB)

1111 = 22.5 dB gain

63,64

unused

Unused, write with 0’s

SM3 and SM5 Subframe Bit Definitions for SDOUT

Bit(s)

Symbol

Description

Bit(s)

Symbol

Description

1-16

ADC-LEFT

Audio Data, ADC Left

2’s Complement data,

MSB first (Bit 1 = MSB)

29-32

VER3-VER0

CS4218 Version Number

0000 = Rev A

1000 = Rev B and later

17-21

reserved

These bits can be 0 or 1

33-48

ADC-RIGHT

Audio Data, ADC Right

2’s Complement data,

MSB first (Bit 33 = MSB)

ADV

ADC Valid Data

0 = Invalid ADC data

1 = Valid ADC data

49-60

reserved

These bits can be 0 or 1

LCL

ADC Left Clipping

0 = Normal

1 = Clipping

DI1

Digital Input 1

0 = Input LOW

1 = Input HIGH

RCL

ADC Right Clipping

0 = Normal

1 = Clipping

DI2

Digital Input 2

0 = Input LOW

1 = Input HIGH

25-28

ER3 - ER0

Error Word

0000 = Normal, no error

0001 = Input Sub-Frame

Bit 21 Set.

Control data is

ignored.

0010 = Sync Pulse Error

Outputs muted.

0011 = Soft PowerDown

Outputs muted.

63*

DI3

Digital Input 3

0 = Input LOW

1 = Input HIGH

* SM3-S sub-modes only

unused

don’t care

Figure 13. SM3 / SM5 Subframe, Bit definitions

CS4218

DS135F1

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