CS4216 Datasheet, PDF (12/58 Pages) Cirrus Logic – 16-Bit Stereo Audio Codec

CS4216
INPUT DATA BIT DEFINITIONS
Sub-frame bits 1 to 16
Left DAC Audio Data, MSB first, 2’s comple-
ment coded.
Sub-frame Bits 17 to 24
17 18 19 20 21 22 23 24
0 0 0 0 EXP MUTE ISL ISR
EXP Expand bit
Reserved. Must be set to zero.
MUTE Mute D/A Outputs
0 - Normal Outputs
1 - Mute Outputs
ISL Select Left Input Mux
0 - Select LIN1
1 - Select LIN2
ISR Select Right Input Mux
0 - Select RIN1
1 - Select RIN2
Sub-frame Bits 25 to 32
25 26 27 28 29 30 31 32
LG3 LG2 LG1 LG0 RG3 RG2 RG1 RG0
LG3-LG0
Sets left input gain.
LG3 is the MSB. LG0 represents 1.5 dB.
0000 = no gain.
1111 = +22.5 dB gain
RG3-RG0 Sets right input gain.
RG3 is the MSB. RGO represents 1.5 dB.
0000 = no gain
Sub-frame Bits 33 to 48
Right DAC audio data MSB first, 2’s comple-
ment coded.
Sub-frame Bits 49 to 50
Must be zero.
Sub-frame Bits 51 to 60
51 52 53 54 55 56 57 58 59 60
* LA4 LA3 LA2 LA1 LA0 RA4 RA3 RA2 RA1 RA0
† _{0 0 LA3 LA2 LA1 LA0 RA3 RA2 RA1 RA0}
LA4-LA0 Sets left output attenuation
†SM1, 2
LA3 is the MSB.
0000 = no attenuation
1111 = -22.5 dB
*SM3,4
LA4 is the MSB.
00000 = no attenuation
11111 = -46.5 dB
LA0 represents 1.5 dB.
RA4-RA0 Sets right output attenuation
†SM1, 2
RA3 is the MSB.
0000 = no attenuation
1111 = -22.5 dB
*SM3,4
RA4 is the MSB.
00000 = no attenuation
11111 = -46.5 dB
RA0 represents 1.5 dB.
Sub-frame Bits 61 to 64
61 62 63 64
DO1 DO2 DO3 DO4
DO1-DO4
Set the logic level on the 4 digital output
pins. In SM3 DO3 and DO4 are not
available. In SM4 DO2, DO3, & DO4
are not available.
SuSubb-ffrraamme e
Word A
Word B
DAC - Left Word
DAC - Left Word
12
0000
M
In
Sel.
3 _Left 0
A/D Gain
3 _Right 0
A/D Gain
SM1 and SM2
DAC - Right Word
3 _Left 0 3 _Right 0
0 0 0 0 D/A Att. D/A Att.
In ³ Left ⁰ 3 Right 0
0 0 0 0 ^M Sel. A/D Gain A/D Gain
DAC - Right Word
4 _Left 0 4 _Right 0
0 0 D/A Att.
D/A Att.
XX
SM3
Figure 5. Serial Data Input Format - SM1, SM2, and SM3.
DS83F2