Cirrus-logic CRD5376 User Manual Page 46
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CRD5376
46 DS612RD2
3.5.1 DF Registers
The DF Registers sub-panel writes and reads registers within the digital filter. Digital filter registers con-
trol operation of the digital filter and the included hardware peripherals, as described in the digital filter
data sheet.
3.5.2 DF Commands
The DF Commands sub-panel sends commands to the digital filter. The digital filter commands and their
required parameters are described in the digital filter data sheet.
Not all commands require write data values, and not all commands will return read data values. Some
commands require formatted data files for uploading custom coefficients or test bit stream data Example
formatted data files are included in the SPI sub-directory of the software installation.
3.5.3 SPI
The SPI sub-panel writes and reads registers in the digital filter SPI register space. They can be used to
check the SPI serial port status bits or to manually write commands to the digital filter.
Control Description
Address Selects a digital filter register.
Data Contains the data written to or read from the register.
Read Initiates a register read.
Write Initiates a register write.
Control Description
Command Selects the command to be written to the digital filter.
Write Data 1 Contains the SPI1DAT1 data to be written to the digital filter.
Write Data 2 Contains the SPI1DAT2 data to be written to the digital filter.
Read Data 1 Contains the SPI1DAT1 data read from the digital filter.
Read Data 2 Contains the SPI1DAT2 data read from the digital filter.
Send Initiates the digital filter command.
Control Description
Start Address Selects the address to begin the SPI transaction.
Data Word 1 Contains the first data word written to or read from the SPI registers.
Data Word 2 Contains the second data word written to or read from the SPI registers.
Data Word 3 Contains the third data word written to or read from the SPI registers.
Read 1 Word Initiates a 1 word SPI read transaction.
Read 3 Words Initiates a 3 word SPI read transaction.
Write 1 Word Initiates a 1 word SPI write transaction.
Write 3 Words Initiates a 3 word SPI write transaction.
- Features 1
- General Description 1
- REVISION HISTORY 2
- TABLE OF CONTENTS 3
- LIST OF FIGURES 4
- LIST OF TABLES 4
- 1. INITIAL SETUP 5
- 1.1 Kit Contents 5
- 1.2 Hardware Setup 5
- 1.2.1 Default Jumper Settings 6
- 1.3 Software Setup 7
- 1.3.1 PC Requirements 7
- 8 DS612RD2 8
- 1.4 Self-Testing CRD5376 9
- 1.4.1 Noise Test 9
- 1.4.2 Distortion Test 10
- 2. HARDWARE DESCRIPTION 11
- 2.1 Block Diagram 11
- 2.2.1.1 External Inputs - INA 12
- 2.2.1.4 Input Protection 12
- 2.2.1.5 Input RC Filters 13
- 2.2.1.7 Analog Test Switches 14
- 2.2.1.6 Common Mode Bias 14
- 2.2.2.3 Anti-alias RC Filters 17
- 2.2.3.2 Offset Enable - OFST 17
- 2.2.4 Delta-Sigma Test DAC 18
- 2.2.5 Voltage Reference 18
- 2.3 Digital Hardware 19
- 2.3.1 Digital Filter 19
- 20 DS612RD2 20
- 2.3.1.1 MCLK vs. MCLK/2 Usage 21
- 22 DS612RD2 22
- CS5376A uController MCLK/2 22
- SDTKI R74 R83 22
- DS612RD2 23 23
- 2.3.2.1 SPI Interface 24
- 2.3.2.2 USB Interface 24
- 2.3.2.3 Reset Source 24
- 2.3.2.4 Clock Source 24
- 2.3.2.5 Timebreak Signal 25
- 2.3.2.6 C2 Debug Interface 25
- 2.3.4 RS-485 Telemetry 26
- 2.3.4.1 CLK, SYNC 27
- 2.3.5 UART Connection 28
- 2.3.6 External Connector 28
- 2.4 Power Supplies 28
- DS612RD2 29 29
- 2.5.2 Differential Pairs 30
- 2.5.3 Bypass Capacitors 31
- 3. SOFTWARE DESCRIPTION 32
- 3.1 Menu Bar 32
- 3.2 About Panel 33
- 3.3 Setup Panel 34
- 3.3.1 USB Port 35
- 3.3.2 Digital Filter 36
- 3.3.3 Analog Front End 37
- 3.3.4 Test Bit Stream 37
- 3.3.5 Gain/Offset 38
- 3.3.6 Data Capture 39
- 3.3.7 External Macros 40
- 3.4 Analysis Panel 41
- 3.4.1 Test Select 42
- 3.4.2 Statistics 43
- 3.4.3 Plot Enable 43
- 44 DS612RD2 44
- 3.5 Control Panel 45
- 3.5.1 DF Registers 46
- 3.5.2 DF Commands 46
- 3.5.3 SPI 46
- 3.5.4 Macros 47
- 3.5.5 GPIO 47
- 3.5.6 Customize 48
- 3.5.7 External Macros 48
- 4. BILL OF MATERIALS 49
- 50 DS612RD2 50
- 5. LAYER PLOTS 51
- 52 DS612RD2 52
- DS612RD2 53 53
- 54 DS612RD2 54
- DS612RD2 55 55
- 56 DS612RD2 56
- 6. SCHEMATICS 57
- 58 DS612RD2 58
- DS612RD2 59 59
- 60 DS612RD2 60
- DS612RD2 61 61
- 62 DS612RD2 62
- DS612RD2 63 63
- 64 DS612RD2 64
- DS612RD2 65 65
- 66 DS612RD2 66
- DS612RD2 67 67
- 68 DS612RD2 68
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