CDB5376 Cirrus Logic Inc, CDB5376 Datasheet - Page 28

• Manufacturer Part Number: CDB5376
• Description: EVALUATION BOARD FOR CS5376
• Manufacturer: Cirrus Logic Inc

Specifications of CDB5376

• Main Purpose: Seismic Evaluation System
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: CS3301A, CS3302A, CS4373A, CS5372A, CS5376A
• Primary Attributes: Quad Digital Filter
• Secondary Attributes: Graphical User Interface, SPI™ & USB Interfaces
• Processor To Be Evaluated: CS330x, CS4373A, CS537x
• Interface Type: USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 598-1778

5 KByte (40 Kbit), which includes command over-
head:
Supported serial configuration EEPROMs are
SPI mode 0 (0,0) compatible, 16-bit addresses, 8-
bit data, larger than 5 KByte (40 KBit). ATMEL
AT25640, AT25128, or similar serial EEPROMs
are recommended.
8.4 EEPROM Configuration
A summary of available EEPROM commands is
shown in Table 5.
28
0000h
0010h
1FFFh
Figure 16. 8 Kbyte EEPROM Memory Organization
Digital Filter Registers (22)
FIR Coefficients (255+255)
IIR Coefficients (3+5)
Test Bit Stream Data (1024)
‘Filter Start’ Command
Total Bytes
Commands
Table 4. Maximum EEPROM Configuration
Memory Requirement
Mfg Header
8-bit Command
N x 24-bit Data
8-bit Command
N x 24-bit Data
. . .
EEPROM
Manufacturing
Information
EEPROM
Command and
Data Values
1537
3076
4793
Bytes
154
25
1
Write DF Register - 0x01
This EEPROM command writes a data value to the
specified digital filter register. Digital filter regis-
ters control hardware peripherals and filtering
functions. See “Digital Filter Registers” on page 86
for the bit definitions of the digital filter registers.
Sample Command:
Write digital filter register 0x00 with data value
0x070431. Then write 0x20 with data 0x000240.
Write FIR Coefficients - 0x02
This EEPROM command writes custom coeffi-
cients for the FIR1 and FIR2 filters. The first two
data words set the number of FIR1 and FIR2 coef-
ficients to be written. The remaining data words are
the concatenated FIR1 and FIR2 coefficients.
A maximum of 255 coefficients can be written for
each FIR filter, though the available digital filter
computation cycles will limit their practical size.
See “FIR Filter” on page 47 for more information
about FIR filter coefficients.
Sample Command:
Write FIR1 coefficients 0x00022E, 0x000771 then
FIR2 coefficients 0xFFFFB9, 0xFFFE8D.
Write IIR Coefficients - 0x03
This EEPROM command writes custom coeffi-
cients for the two stage IIR filter. The IIR architec-
ture and number of coefficients is fixed, so eight
data words containing coefficient values always
immediately follow the command byte. The IIR co-
efficient write order is: a11, b10, b11, a21, a22,
b20, b21, and b22. See “IIR Filter” on page 55 for
more information about IIR filter coefficients.
01 00 00 00 07 04 31
01 00 00 20 00 02 40
02 00 00 02 00 00 02
00 02 2E 00 07 71 FF FF B9 FF FE 8D
CS5376A
DS612F4