Cirrus-logic CS5376A Instrukcja Użytkownika Strona 69
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CS5376A
DS612F4 69
Any GPIO pin can be used as an open-drain output
by setting the data value to 0, enabling the pull-up,
and using the GP_DIR direction bits to control the
pin value. This open-drain output configuration
uses the internal pull-up resistor to hold the pin
high when GP_DIR is set as an input, and drives the
pin low when GP_DIR is set as an output.
19.5.1 GPIO Reads in Output Mode
When reading GPIO pins the GP_DATA register
value always reports the current state of the pins, so
a value written in output mode does not necessarily
read back the same value. If a pin in output mode is
written as a logical 1, the CS5376A attempts to
drive the pin high. If an external device forces the
pin low, the read value reflects the pin state and re-
turns a logical 0. Similarly, if an output pin is writ-
ten as a logical 0 but forced high externally, the
read value reflects the pin state and returns a logical
1. In both cases the CS5376A is in contention with
the external device resulting in increased power
consumption.
- Features 1
- Description 1
- TABLE OF CONTENTS 2
- DS612F4 3 3
- LIST OF FIGURES 4
- DS612F4 5 5
- LIST OF TABLES 6
- 1. GENERAL DESCRIPTION 7
- 1.1 Digital Filter Features 7
- 1.3 System Level Features 8
- 1.4 Configuration Interface 9
- DS612F4 10 10
- SPI 1 Registers 12
- Digital Filter Registers 12
- ABSOLUTE MAXIMUM RATINGS 13
- THERMAL CHARACTERISTICS 14
- DIGITAL CHARACTERISTICS 14
- POWER CONSUMPTION 14
- SWITCHING CHARACTERISTICS 15
- 3. SYSTEM DESIGN WITH CS5376A 19
- 3.1 Power Supplies 19
- 3.2 Reset Control 19
- 20 DS612F4 20
- 4. POWER SUPPLIES 21
- 4.1 Pin Descriptions 21
- 4.2 Bypass Capacitors 22
- 4.3 Power Consumption 22
- 5. RESET CONTROL 23
- 5.1 Pin Descriptions 23
- 5.2 Reset Self-Tests 23
- 5.3 Boot Configurations 23
- 6. CLOCK GENERATION 24
- 6.1 Pin Description 24
- 6.2 Synchronous Clocking 24
- 8. CONFIGURATION BY EEPROM 26
- 8.1 Pin Descriptions 26
- 8.2 EEPROM Hardware Interface 26
- 8.3 EEPROM Organization 26
- SPI 1 Read from EEPROM 27
- 8.4 EEPROM Configuration 28
- Commands 28
- Sample Command: 28
- DS612F4 31 31
- 9.1 Pin Descriptions 32
- 34 DS612F4 34
- DS612F4 37 37
- DS612F4 38 38
- 10.MODULATOR INTERFACE 39
- 10.1Pin Descriptions 39
- 10.3Modulator Synchronization 39
- 10.4Modulator Data Inputs 40
- 10.5Modulator Flag Inputs 40
- Correction 41
- 42 DS612F4 42
- 12.SINC FILTER 43
- 12.1SINC1 Filter 43
- 12.2SINC2 Filter 43
- 12.3SINC3 Filter 43
- SINC filters 44
- DS612F4 46 46
- 13.FIR FILTER 47
- 13.1FIR1 Filter 47
- 13.2FIR2 Filter 47
- 13.3On-Chip FIR Coefficients 47
- 48 DS612F4 48
- SINC + FIR filters 49
- DS612F4 50 50
- Minimum phase group delay 51
- DS612F4 52 52
- DS612F4 53 53
- DS612F4 54 54
- DS612F4 55 55
- 14.4IIR3 Filter 56
- 14.5On-Chip IIR Coefficients 56
- IIR filters 57
- 58 DS612F4 58
- DS612F4 59 59
- 60 DS612F4 60
- DS612F4 61 61
- FIFO Overflow Bit - W 62
- Conversion Data Word 62
- 16.3.1 Request Mode 62
- 16.3.2 Continuous Mode 63
- 64 DS612F4 64
- 66 DS612F4 66
- TIMEB - Pin 57 67
- 68 DS612F4 68
- DS612F4 69 69
- CS[4:0] - Pins 32 - 36 70
- SCK2 - Pin 31 70
- SO - Pin 30 70
- SI[4:1] - Pins 26 - 29 70
- DS612F4 71 71
- 20.3.3 SPI 2 Data Register 72
- Write Transactions 72
- Read Transactions 72
- SPI Modes 72
- SPI 2 Write to External Slave 73
- DS612F4 74 74
- TRST - Pin 1 75
- TMS - Pin 2 75
- TCK - Pin 3 75
- TDI - Pin 4 75
- TDO - Pin 5 75
- 21.2.1 JTAG Reset 76
- 21.2.2 TAP Controller 76
- 21.2.3 Boundary Scan Cells 76
- DS612F4 77 77
- DS612F4 78 78
- DS612F4 79 79
- 80 DS612F4 80
- 23.REGISTER SUMMARY 81
- 23.1SPI 1 Registers 81
- 82 DS612F4 82
- SPI 1 Address: 0x00 82
- DS612F4 83 83
- SPI 1 Address: 0x03 83
- 84 DS612F4 84
- SPI 1 Address: 0x06 84
- DS612F4 85 85
- SPI 1 Address: 0x09 85
- 23.2 Digital Filter Registers 86
- DS612F4 87 87
- DF Address: 0x00 87
- 88 DS612F4 88
- DF Address: 0x0E 88
- DS612F4 89 89
- DF Address: 0x0F 89
- 90 DS612F4 90
- DF Address: 0x10 90
- DS612F4 91 91
- DF Address: 0x11 91
- 92 DS612F4 92
- DF Address: 0x12 92
- DS612F4 93 93
- DF Address: 0x20 93
- 94 DS612F4 94
- DF Address: 0x21 94
- DS612F4 95 95
- DF Address: 0x25 95
- 96 DS612F4 96
- DF Address: 0x29 96
- DS612F4 97 97
- DF Address: 0x2A 97
- 98 DS612F4 98
- DF Address: 0x2B 98
- DS612F4 99 99
- DF Address: 0x2C 99
- 100 DS612F4 100
- DF Address: 0x2E 100
- DS612F4 101 101
- DF Address: 0x2F 101
- 24.PIN DESCRIPTIONS 102
- 64L TQFP PACKAGE DRAWING 105
- 26.ORDERING INFORMATION 106
- 28.REVISION HISTORY 106
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