Specifications

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
22 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.
23 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.
24 ISR Input Mux, Right Select
0 = RIN1
1 = RIN2
61 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
62 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)
22 ADV ADC Valid Data
0 = Invalid ADC data
1 = Valid ADC data
49-60 reserved These bits can be 0 or 1
23 LCL ADC Left Clipping
0 = Normal
1 = Clipping
61 DI1 Digital Input 1
0 = Input LOW
1 = Input HIGH
24 RCL ADC Right Clipping
0 = Normal
1 = Clipping
62 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
64 unused don’t care
Figure 13. SM3 / SM5 Subframe, Bit definitions
CS4218
DS135F1 17