HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 518
HD6417641
Manufacturer Part Number
HD6417641
Description
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417641.pdf
(1036 pages)
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Section 15 User Debugging Interface (H-UDI)
15.4
15.4.1
Figure 15.2 shows the internal states of the TAP controller. State transitions basically conform
with the JTAG standard.
Note: The transition condition is the TMS value at the rising edge of TCK. The TDI value is
Rev. 4.00 Sep. 14, 2005 Page 468 of 982
REJ09B0023-0400
sampled at the rising edge of TCK; shifting occurs at the falling edge of TCK. For details
on change timing of the TDO value, see section 15.4.3, TDO Output Timing. The TDO is
at high impedance, except with shift-DR and shift-IR states. During the change to TRST =
0, there is a transition to test-logic-reset asynchronously with TCK.
Operation
TAP Controller
1
0
Test-logic-reset
Run-test/idle
0
Figure 15.2 TAP Controller State Transitions
1
0
Select-DR-scan
Capture-DR
Update-DR
1
Pause-DR
Exit1-DR
Exit2-DR
Shift-DR
0
1
0
1
1
0
0
0
1
1
0
Select-IR-scan
Capture-IR
1
Update-IR
Pause-IR
Exit1-IR
Exit2-IR
0
0
1
0
1
1
Shift-IR
0
0
0
1
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