Renesas SH7781 用户手册
30. User Debugging Interface (H-UDI)
Rev.1.00 Jan. 10, 2008 Page 1505 of 1658
REJ09B0261-0100
30.4.2
TAP Control
Figure 30.3 shows the internal states of the TAP controller. The controller supports the state
transitions specified in JTAG with the subset.
transitions specified in JTAG with the subset.
• The condition of transition is the TMS value at the rising edge of TCK.
• The TDI value is sampled at the rising edge of TCK and shifted at the falling edge of TCK.
• The TDO value is changed at the falling edge of TCK. The TDO is in the high impedance state
• The TDI value is sampled at the rising edge of TCK and shifted at the falling edge of TCK.
• The TDO value is changed at the falling edge of TCK. The TDO is in the high impedance state
other than in the Shift-DR or Shift-IR state.
• When TRST is changed to 0, the transition to the Test-Logic-Reset state is performed
asynchronously with the TCK signal.
Test -Logic-Reset
Capture-DR
Shift-DR
Exit1-DR
Pause-DR
Exit2-DR
Update-DR
Select-DR-Scan
Run-Test/Idle
1
0
0
0
0
1
1
1
1
0
0
0
1
1
1
0
1
1
1
0
Capture-IR
Shift-IR
Exit1-IR
Pause-IR
Exit2-IR
Update-IR
Select-IR-Scan
0
0
1
0
0
0
1
0
1
1
1
0
Figure 30.3 Diagram of Transitions of TAP Controller State