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UG380 (v2.7) October 29, 2014
Chapter 10
Advanced JTAG Configurations
Introduction
Spartan®-6 devices support IEEE Std 1149.1. The Joint Test Action Group (JTAG) is the
technical subcommittee responsible for developing IEEE Std 1149.1. This standard ensures
the board-level integrity of individual components and the interconnections between
them. The IEEE Std 1149.1 TAP and boundary-scan architecture is commonly referred to as
JTAG. With multi-layer PC boards becoming increasingly dense and with more
sophisticated surface mounting techniques in use, boundary-scan testing is becoming
widely used as an important debugging tool.
Devices containing boundary-scan logic can send data out on I/O pins to test connections
between devices at the board level. The circuitry can also be used to send signals internally
to test the device-specific behavior. These tests are commonly used to detect opens and
shorts at both the board and device level.
In addition to testing, boundary-scan offers the flexibility for a device to have its own set of
user-defined instructions. The added, common, vendor-specific instructions, such as
configure and verify, have increased the popularity of boundary-scan testing and
functionality.
- Spartan-6 FPGA 1
- Configuration 1
- Revision History 3
- Table of Contents 7
- Chapter 4: User Primitives 8
- Chapter 8: Readback CRC 10
- About This Guide 13
- Additional Resources 14
- Configuration Overview 15
- Design Considerations 16
- Slave Modes 17
- UG380_c1_02_051109 18
- Serial SelectMAP 18
- MultiBoot /Safe Update 20
- Required I/O Voltages 20
- Nonvolatile Data Storage 20
- FPGA Density Migration 21
- Production Lifetime 21
- Configuration Factors 22
- Chapter 2 23
- Master Serial 26
- Slave Serial Configuration 27
- Spartan-6 28
- Microprocessor 28
- Platform Flash 32
- SelectMAP Data Loading 35
- SelectMAP Data Ordering 39
- SPI Configuration Interface 40
- SPI Flash 42
- W25Q SPI 43
- UG380_c2_14_011310 44
- Master SPI Timing Waveform 45
- Power-On Sequence Precautions 46
- SPI Serial Daisy-Chain 47
- Chapter 3 59
- Data Valid 60
- User Primitives 65
- ICAP_SPARTAN6 66
- STARTUP_SPARTAN6 67
- SUSPEND_SYNC 68
- POST_CRC_INTERNAL 69
- Chapter 4: User Primitives 70
- Configuration Details 71
- Pin Name Type 72
- Description 72
- Bitstream Overview 75
- Generating PROM Files 77
- UG380_c5_01_042909 78
- Parallel Bus Bit Order 79
- Configuration Sequence 80
- Setup (Steps 1-3) 81
- UG380_c5_04_050812 82
- Sample Mode Pins (Step 3) 83
- UG380_c5_05_042909 83
- UG380_c5_06_042909 83
- Synchronization (Step 4) 84
- Check Device ID (Step 5) 84
- UG380_c5_07_042909 84
- UG380_c5_08_042909 84
- Startup (Step 8) 86
- Phase Event 87
- Signal Name Type Access 88
- Bitstream Encryption 89
- Loading the Encryption Key 90
- Loading Encrypted Bitstreams 90
- Configuration Memory Frames 95
- Type 1 Packet 96
- Type 2 Packet 96
- Configuration Registers 97
- CRC Register 98
- CBC_REG Register 100
- IDCODE Register 100
- CSBO Register 100
- Command Register (CMD) 100
- Control Register 0 (CTL) 101
- Status Register (STAT) 102
- Configuration Packets 103
- Suspend Register (PWRDN_REG) 104
- Frame Length Register 104
- Multi-Frame Write Register 104
- HC_OPT_REG Register 105
- MODE Register 106
- CCLK_FREQ Register 107
- PU_GWE Register 107
- PU_GTS Register 107
- SEU_OPT Register 108
- DNA_PORT 109
- UG380_c5_14_052009 110
- Read = 0 110
- X = Don’t care 110
- ↑ = Rising clock edge 110
- UG380_c5_15_121112 111
- UG380_c5_16_021010 111
- UG380_c5_17_052009 112
- UG380 (v2.7) October 29, 2014 113
- Readback and Configuration 115
- Verification 115
- Readback Command Sequences 116
- AA 99 55 66 28 00 E0 0 0 117
- Verifying Readback Data 127
- UG380_c6_04_042909 128
- MSK and BIT Files 129
- Reconfiguration and MultiBoot 131
- Fallback MultiBoot 132
- IPROG Reconfiguration 134
- Watchdog Timer 135
- Readback CRC 137
- CRC Masking 138
- Chapter 8: Readback CRC 140
- Distributed RAM 141
- Post_CRC Constraints 142
- POST_CRC 143
- POST_CRC_INIT_FLAG 143
- POST_CRC_SOURCE 143
- POST_CRC_ACTION 144
- POST_CRC_FREQ 144
- Chapter 9 145
- Mixed Serial Daisy-Chains 146
- Startup Sequencing (GTS) 147
- Active DONE Driver 147
- Connect All DONE Pins 147
- DONE Pin Rise Time 147
- Bitstream Formatting 147
- Parallel Daisy-Chain 151
- Ganged SelectMAP 152
- UG380_c9_06_021710 153
- ABORT Status Word 154
- SelectMAP Reconfiguration 155
- Advanced JTAG Configurations 157
- JTAG Configuration/Readback 158
- Boundary-Scan Register 161
- Instruction Register 162
- UG380_c10_03_102014 162
- BYPASS Register 164
- JTAG Configuration Register 164
- USERCODE Register 164
- Load CFG_IN 166
- Instruction 166
- Single Device Configuration 167
- Multiple Device Configuration 168
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