AN 904: Intel® MAX® 10 Hitless Update Implementation Guidelines

ID 683380
Date 5/26/2023
Public

1.9. JTAG Instructions

Table 2.  JTAG Instructions
Instruction Name Instruction Binary Description
SAMPLE/ PRELOAD 00 0000 0101
  • Permits an initial data pattern to be an output at the device pins.
  • Allows you to capture and examine a snapshot of signals at the device pins if the device is operating in normal mode.
EXTEST 00 0000 1111
  • Forces test pattern at the output pins and capture the test results at the input pins.
  • Allows you to test the external circuitry and board-level interconnects.
BYPASS 11 1111 1111
  • Places the 1-bit bypass register between the TDI and TDO pins.
  • Allows the BST data to pass synchronously through target devices to adjacent devices during normal device operation.
ISP_ENABLE_CLAMP 10 0011 0011 Enables ISP mode and forces all I/Os to follow the content of the JTAG boundary-scan register.
ISP_DISABLE 10 0000 0001 Disables ISP mode.