cs5378 Cirrus Logic, Inc., cs5378 Datasheet - Page 28

• Manufacturer Part Number: cs5378
• Description: Low-power Single-channel Decimation Filter
• Manufacturer: Cirrus Logic, Inc.

Sample Command:
Write IIR1 coefficients 0x84BC9D, 0x7DA1B1,
0x825E4F,
0x3CAD5F, 0x3E5104, 0x835DF8, 0x3E5104.
Write ROM Coefficients - 0x04
This EEPROM command selects the on-chip coef-
ficients for the FIR1, FIR2, IIR 1st order, and IIR
2nd order filters for use by the digital filter. One
data word is required to select which internal coef-
ficient sets to use. See “Filter Coefficient Selec-
tion” on page 38 for information about selecting
on-chip FIR and IIR coefficient sets.
DS639F1
03
84 BC 9D 7D A1 B1 82 5E 4F 83 69 4F
3C AD 5F 3E 51 04 83 5D F8 3E 51 04
NOP
WRITE DF REGISTER
WRITE FIR COEFFICIENTS
WRITE IIR COEFFICIENTS
WRITE ROM COEFFICIENTS
NOP
NOP
FILTER START
(DATA) indicates multiple words of this type are to be written.
and IIR2 coefficients 0x83694F,
Name
Table 7. EEPROM Boot Configuration Commands
CMD
8-bit
00
01
02
03
04
05
06
07
(FIR COEF)
COEF SEL
NUM FIR1
NUM FIR2
DATA
24-bit
DATA
REG
b10
a21
a22
b20
b21
b22
a11
b11
-
-
-
-
Sample Command:
Select IIR1 and IIR2 3 Hz @ 500 SPS low-cut co-
efficients, with FIR1 and FIR2 linear phase high-
cut coefficients. Data word 0x002200.
Filter Start - 0x07
This EEPROM command initializes and starts the
digital filter. Measurement data becomes available
one full sample period after this command is is-
sued. No data words are required for this EE-
PROM command.
Sample Command:
No Operation
Write Digital Filter Register
Write Custom FIR Coefficients
Write Custom IIR Coefficients
Use On-Chip Coefficients
No Operation
No Operation
Start Digital Filter Operation
04 00 22 00
07
Description
CS5378
28