CS8422 View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
CS8422 Datasheet PDF : 82 Pages
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11.SOFTWARE REGISTER BIT DEFINITIONS
CS8422
The table row beneath the row that contains the register-bit name shows the register bit default value. Bits labeled
‘Reserved’ must remain at their default value.
11.1 CS8422 I.D. and Version Register (01h)
7
6
5
4
3
ID4
ID3
ID2
ID1
ID0
0
0
0
1
0
ID[4:0] - ID code for the CS8422. Permanently set to 00010
REV[2:0] = 000 (revision A)
REV[2:0] = 010 (revision B1)
2
REV2
0
1
REV1
0
0
REV0
0
11.2 Clock Control (02h)
7
PDN
1
6
FSWCLK
0
5
SWCLK
0
4
3
RMCK_CTL1 RMCK_CTL0
0
0
2
INT1
0
1
INT0
0
0
Reserved
0
PDN - Controls the internal clocks, allowing the CS8422 to be placed in a “powered down”, low current con-
sumption state. This bit must be written to the 0 state to allow the CS8422 to begin operation. All input clocks
should be stable in frequency and phase when PDN is set to 0.
0- Normal part operation.
1- Internal clocks are stopped. Internal state machines are reset. The fully static control port is operational,
allowing registers to be read or changed. Power consumption is low.
FSWCLK – Forces the clock signal on XTI to be output on RMCK regardless of the SWCLK bit functionality
or PLL lock.
0 – Clock signal on XTI is output on RMCK according to the SWCLK bit functionality.
1 – Forces the clock signal on XTI to be output on RMCK regardless of the SWCLK bit functionality.
SWCLK - Outputs XTI clock signal on RMCK pin when PLL loses lock. Any OSCLK or OLRCK derived from
RMCK under normal conditions will be derived from XTI in this case.
0 - Disable automatic clock switching.
1 - Enable automatic clock switching on PLL unlock. Clock signal selected on XTI is automatically output
on RMCK on PLL Unlock.
RMCK_CTL[1:0] - RMCK Control
00 - RMCK is an output and is derived from the frame rate of incoming AES3 data.
01 - RMCK is an output and is derived from the ISCLK input frequency divided by 64. Only valid if serial
audio input port is in slave mode (SIMS = 0 in “Serial Audio Input Data Format (0Bh)” on page 53).
10 - RMCK is high-impedance.
11 - Reserved
INT[1:0] - Interrupt output pin (INT) control
00 - Active high; high output indicates interrupt condition has occurred.
DS692F1
47
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