Cirrus Logic CS5376A - Manual (Page 35)

CS5376A
DS612F4 35
The E2DREQ bit reads high while a configuration
command is being processed. When low, the digital
filter is ready to receive a new configuration com-
mand.
9.4 Microcontroller Configuration
Commands
A summary of available microcontroller configura-
tion commands is listed in Table 7.
Write DF Register - 0x01
This configuration command writes a specified
digital filter register. Digital filter registers control
hardware peripherals and filtering functions. See
“Digital Filter Registers” on page 86 for the bit def-
initions of the digital filter registers.
Sample Command:
Write digital filter register 0x00 with data value
0x070431. Then write 0x20 with data 0x000240.
02 03 00 00 01 00 00 00 07 04 31
Delay 1 ms, monitor SINT, or poll E2DREQ
02 03 00 00 01 00 00 20 00 02 40
Delay 1 ms, monitor SINT, or poll E2DREQ
Read DF Register - 0x02
This command reads a specified digital filter regis-
ter. The register value is requested in the first SPI
transaction, with the register value copied to
SPI1DAT1 and read in a subsequent SPI transac-
tion.
Sample Command:
Read digital filter registers 0x00 and 0x20.
02 03 00 00 02 00 00 00
[DATA] indicates data word returned from digital filter.
(DATA) indicates multiple words of this type are to be written.
Name CMD
24-bit
DAT1
24-bit
DAT2
24-bit
Description
NOP 000000 - - No Operation
WRITE DF REGISTER 000001 REG DATA Write Digital Filter Register
READ DF REGISTER 000002 REG
[DATA]
-
- Read Digital Filter Register
WRITE FIR COEFFICIENTS 000003 NUM FIR1
(FIR COEF)
NUM FIR2
(FIR COEF)
Write Custom FIR Coefficients
WRITE IIR COEFFICIENTS 000004 a11
b11
a22
b21
b10
a21
b20
b22 Write Custom IIR Coefficients
WRITE ROM COEFFICIENTS 000005 COEF SEL - Use On-Chip Coefficients
WRITE TBS DATA 000006 NUM TBS
(TBS DATA)
-
(TBS DATA)
Write Custom Test Bit Stream Data
WRITE ROM TBS 000007 - - Use On-Chip TBS Data
FILTER START 000008 - - Start Digital Filter Operation
FILTER STOP 000009 - - Stop Digital Filter Operation
Table 7. Microcontroller Boot Configuration Commands