13–6
Chapter 13: IEEE 1149.1 (JTAG) Boundary-Scan Testing for MAX II Devices
IEEE Std. 1149.1 BST Operation Control
IEEE Std. 1149.1 BST Operation Control
MAX II devices implement the following IEEE Std. 1149.1 BST instructions:
SAMPLE/PRELOAD, EXTEST, BYPASS, IDCODE, USERCODE, CLAMP, and HIGHZ. The
length of the BST instructions is 10 bits. These instructions are described in detail later
in this chapter.
f
Refer to the JTAG and In-System Programmability chapter in the MAX II Device Handbook
for a summary of the BST instructions and their instruction codes.
The IEEE Std. 1149.1 TAP controller, a 16-state state machine clocked on the rising
edge of TCK, uses the TMSpin to control IEEE Std. 1149.1 operation in the device.
Figure 13–5 shows the TAP controller state machine.
MAX II Device Handbook
© October 2008 Altera Corporation
ALTERA [ ALTERA CORPORATION ]
