Datasheet

Table Of Contents
Section 14 Boundary Scan Function
REJ09B0140-0900 Rev. 9.00 Page 485 of 846
Sep 16, 2010
H8S/2215 Group
14.4 Boundary Scan Function Operation
14.4.1 TAP Controller
Figure 14.3 shows the TAP controller status transition diagram, based on the JTAG standard.
Test-Logic-Reset
1
1
1
1
1
1
1
11
1
0
0
0
0
0
0
0
0
1
1
1
1
1
0
0
0
0
0
0
0
0
1
Run-Test/Idle
Select-DR
Capture-DR
Shift-DR
Exit1-DR
Update-DR
Pause-DR
Exit2-DR
Select-IR
Capture-IR
Shift-IR
Exit1-IR
Update-IR
Pause-IR
Exit2-IR
Figure 14.3 TAP Controller Status Transition
Note: The transition condition is the TMS value at the rising edge of TCK. The TDI value is
sampled at the rising edge of the TCK and shifted at the falling edge of the TCK. The
TDO value changes at the falling edge of the TCK. In addition, TDO is high-impedance
state in a state other than Shift-DR or Shift-IR state. If TRST is 0, Test-Logic-Reset state
is entered asynchronously with the TCK.