Xilinx Virtex-4 Configuration User Guide

Virtex-4 FPGA Configuration User Guide www.xilinx.com 63
UG071 (v1.12) June 2, 2017
Boundary-Scan for Virtex-4 Devices Using IEEE Standard 1149.1
R
Table 3-3: Virtex-4 Boundary-Scan Instructions
Boundary-Scan Command
Binary Code
(9:0)
Description
EXTEST 1111000000 Enables Boundary-Scan EXTEST operation
SAMPLE 1111000001 Enables Boundary-Scan SAMPLE operation
USER1 1111000010 Access user-defined register 1
USER2 1111000011 Access user-defined register 2
USER3 1111100010 Access user-defined register 3
USER4 1111100011 Access user-defined register 4
CFG_OUT 1111000100 Access the configuration bus for readback
CFG_IN 1111000101 Access the configuration bus for configuration
INTEST 1111000111 Enables Boundary-Scan INTEST operation
USERCODE 1111001000 Enables shifting out user code
IDCODE 1111001001 Enables shifting out of ID code
HIGHZ 1111001010 3-state output pins while enabling Bypass Register
JPROGRAM 1111001011 Equivalent to and has the same affect as PROGRAM
JSTART 1111001100 Clocks the start-up sequence when StartClk is TCK
JSHUTDOWN 1111001101 Clocks the shutdown sequence
ISC_ENABLE 1111010000 Marks the beginning of ISC configuration. Full shutdown is executed
ISC_PROGRAM 1111010001 Enables in-system programming
ISC_PROGRAM_SECURITY 1111010010 Change security status from secure to non-secure mode and vice versa
ISC_ADDRESS_SHIFT 1111010011 For programming, key address is shifted first, before the key
ISC_NOOP 1111010100 No operation
ISC_READ 1111010101 Used to read back BBR
ISC_DISABLE 1111010111 Completes ISC configuration. Startup sequence is executed
BYPASS 1111111111 Enables BYPASS
RESERVED
All other codes
Xilinx reserved instructions
Notes:
1. For FX devices with two processors, the instruction codes are MSB extended with 1s. For example, the CFG_IN instruction is
1111 1111 000101.
TDI →
IR[9:6] IR[5] IR[4] IR[3] IR[2] IR[1:0]
→ TDO
Reserved DONE INIT ISC_ENABLED ISC_DONE 0 1
Figure 3-4: Virtex-4 Instruction Capture Values Loaded into IR as Part of an Instruction Scan Sequence

Xilinx Virtex-4 Specifications

General

Brand	Xilinx
Model	Virtex-4
Category	Motherboard
Language	English