Renesas Stereo System SH7709S User Manual
Rev. 5.00, 09/03, page 651 of 760
22.4
UDI Operation
22.4.1
TAP Controller
Figure 22.2 shows the internal states of the TAP controller. State transitions basically conform
with the JTAG standard.
with the JTAG standard.
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
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
1
0
1
1
1
0
0
Figure 22.2 TAP Controller State Transitions
Note:
The transition condition is the TMS value at the rising edge of TCK. The TDI value is
sampled at the rising edge of TCK; shifting occurs at the falling edge of TCK. The TDO
value changes at the TCK falling edge. The TDO is at high impedance, except with shift-
DR (shift-SR) and shift-IR states. During the change to
sampled at the rising edge of TCK; shifting occurs at the falling edge of TCK. The TDO
value changes at the TCK falling edge. The TDO is at high impedance, except with shift-
DR (shift-SR) and shift-IR states. During the change to
TRST = 0, there is a transition to
test-logic-reset asynchronously with TCK.