CS5376A-IQZR Cirrus Logic Inc, CS5376A-IQZR Datasheet - Page 35

• Manufacturer Part Number: CS5376A-IQZR
• Description: IC LP Multi-Channel Decimation Filter
• Manufacturer: Cirrus Logic Inc

Specifications of CS5376A-IQZR

• Filter Type: Digital
• Number Of Filters: 4
• Max-order: 2nd
• Voltage - Supply: 3 V ~ 5 V
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP, 64-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1778 - EVALUATION BOARD FOR CS5376
• Frequency - Cutoff Or Center: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
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.
DS612F4
NOP
WRITE DF REGISTER
READ DF REGISTER
WRITE FIR COEFFICIENTS
WRITE IIR COEFFICIENTS
WRITE ROM COEFFICIENTS
WRITE TBS DATA
WRITE ROM TBS
FILTER START
FILTER STOP
Commands
[DATA] indicates data word returned from digital filter.
(DATA) indicates multiple words of this type are to be written.
Name
Table 7. Microcontroller Boot Configuration Commands
000000
000001
000002
000003
000004
000005
000006
000007
000008
000009
24-bit
CMD
(TBS DATA)
(FIR COEF)
COEF SEL
NUM FIR1
NUM TBS
[DATA]
24-bit
DAT1
REG
REG
a22
b21
a11
b11
-
-
-
-
Sample Command:
Write digital filter register 0x00 with data value
0x070431. Then write 0x20 with data 0x000240.
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.
(FIR COEF)
(TBS DATA)
NUM FIR2
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
02 03 00 00 02 00 00 00
24-bit
DAT2
DATA
b10
a21
b20
b22
-
-
-
-
-
-
-
-
No Operation
Write Digital Filter Register
Read Digital Filter Register
Write Custom FIR Coefficients
Write Custom IIR Coefficients
Use On-Chip Coefficients
Write Custom Test Bit Stream Data
Use On-Chip TBS Data
Start Digital Filter Operation
Stop Digital Filter Operation
Description
CS5376A
35