What is the limit of DAP means hw many BST instruction it can excute ?
Hi,
Full details on the JTAG-DP (the DAP accessed via JTAG) are available from:
http://infocenter.arm.com/help/topic/com.arm.doc.ihi0031c/index.html
Chapter B3 covers the JTAG-DP which will answer you question in detail.
A brief summary might be;
The DAP can be configured to use either a 4 bit or 8 bit IR. The Arm DAP implements 5 instructions {ABORT, DPACC, APACC, IDCODE, BYPASS}. Note that implementations may choose to extend the set of supported instructions.
Regards Tony