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15.2.1.4
TAP Elements
The Test Access Port (TAP) contains a TAP controller, an instruction register, a group of test data
registers, and the TAP pins as shown in the block diagram in
general-purpose port that provides access to the test data registers and instruction registers through
the TAP controller.
TDI
I R
TMS
Tap
Controller
TCK
TRST
Figure 15-1. Test Access Port Block Diagram
Figure
Boundary Scan Chain
ID Reg
Bypass Reg
Runbist Reg
Control And Clock Signals
TEST FEATURES
15-1. The TAP is the
TDO
15-3
15
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