CS8416-IS Cirrus Logic, CS8416-IS Datasheet - Page 33

• Manufacturer Part Number: CS8416-IS
• Description: 192 kHZ DIGITAL AUDIO INTERFACE RECEIVER
• Manufacturer: Cirrus Logic

8.15
8.16
8.17
8.18
DS578PP2
25
26
27
28
29
30
31
32
33
34
35
36
37
38
ORR7
ID3
7
7
OMCK/RMCK Ratio (18h)
Channel Status Registers (19h - 22h)
IEC61937 PC/PD Burst preamble (23h - 26h)
CS8416 I.D. and Version Register (7Fh)
ORR[7:6] - Integer part of the ratio (Integer value=Integer(SRR[7:6]))
ORR[5:0] - Fractional part of the ratio (Fraction value=Integer(SRR[5:0])/64)
Burst Preamble PC Byte 0
Burst Preamble PC Byte 1
Burst Preamble PD Byte 0
Burst Preamble PD Byte 1
Channel A Status Byte 0
Channel A Status Byte 1
Channel A Status Byte 2
Channel A Status Byte 3
Channel A Status Byte 4
Channel B Status Byte 0
Channel B Status Byte 1
Channel B Status Byte 2
Channel B Status Byte 3
Channel B Status Byte 4
This register allows the calculation of the incoming sample rate by the host microcontroller from the
equation ORR=Fso/Fsi. The Fso is determined by OMCK, whose frequency is assumed to be 256
Fso. ORR is represented as an unsigned 2-bit integer and a 6-bit fractional part. The value is mean-
ingful only after the PLL has reached lock. For example, if the OMCK is 12.288MHz, Fso would be
48KHz (48KHz = 12.288MHz/256). Then if the input sample rate is also 48KHz, you would get 1.0
from the ORR register.(The value from the ORR register is hexadecimal, so the actual value you will
get is 40h). If F
ORR. Therefore a small amount of jitter on either clock can cause the LSB ORR[0] to oscillate.
ID[3:0]= 0010
VER[3:0] = 0001 (revision A)
ORR6
ID2
6
6
SO
/F
ORR5
ID1
SI
5
5
>
3
AC0[7]
AC1[7]
AC2[7]
AC3[7]
AC4[7]
BC0[7]
BC1[7]
BC2[7]
BC3[7]
BC4[7]
PC0[7]
PC1[7]
PD0[7]
PD1[7]
63
/
64
, ORR will saturate at the value FFh. Also, there is no hysteresis on
ORR4
ID0
4
4
AC0[6]
AC1[6]
AC2[6]
AC3[6]
AC4[6]
BC0[6]
BC1[6]
BC2[6]
BC3[6]
BC4[6]
PC0[6]
PC1[6]
PD0[6]
PD1[6]
AC0[5]
AC1[5]
AC2[5]
AC3[5]
AC4[5]
BC0[5]
BC1[5]
BC2[5]
BC3[5]
BC4[5]
PC0[5]
PC1[5]
PD0[5]
PD1[5]
ORR3
VER3
3
3
AC0[4]
AC1[4]
AC2[4]
AC3[4]
AC4[4]
BC0[4]
BC1[4]
BC2[4]
BC3[4]
BC4[4]
PC0[4]
PC0[4]
PC0[4]
PD1[4]
ORR2
VER2
2
2
AC0[3]
AC1[3]
AC2[3]
AC3[3]
AC4[3]
BC0[3]
BC1[3]
BC2[3]
BC3[3]
BC4[3]
PC0[3]
PC1[3]
PD0[3]
PD1[3]
AC0[2]
AC1[2]
AC2[2]
AC3[2]
AC4[2]
BC0[2]
BC1[2]
BC2[2]
BC3[2]
BC4[2]
PC0[2]
PC1[2]
PD0[2]
PD1[2]
ORR1
VER1
1
1
AC0[1]
AC1[1]
AC2[1]
AC3[1]
AC4[1]
BC0[1]
BC1[1]
BC2[1]
BC3[1]
BC4[1]
PC0[1]
PC1[1]
PD0[1]
PD1[1]
CS8416
ORR0
VER0
0
0
AC0[0]
AC1[0]
AC2[0]
AC3[0]
AC4[0]
BC0[0]
BC1[0]
BC2[0]
BC3[0]
BC4[0]
PC0[0]
PC1[0]
PD0[0]
PD1[0]
33