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PM0020 Datasheet(PDF) 44 Page - STMicroelectronics

Part # PM0020
Description  STR91xFA Flash programming manual
PDF  87 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM0020 Datasheet(HTML) 44 Page - STMicroelectronics

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JTAG sequence
PM00020
44/87
5
JTAG sequence
Figure 5.
JTAG sequence flowchart
Since STR91xFA devices include JTAG enabled CPU device in series with the Flash
memory die, it is necessary to insert BYPASS instruction (opcode: all 1’s) for the CPU
device in all JTAG instruction cycle and account for the extra BYPASS bit(s) during data
cycle.
Test-Logic-Reset
F
Run-Test/Idle
C
Select-DR-Scan
7
Select-IR-Scan
4
Capture-DR
6
Capture-IR
E
Shift-DR
2
Shift-IR
A
Exit1-DR
1
Exit1-IR
9
Pause-DR
3
Pause-IR
B
Exit2-DR
0
Exit2-IR
8
Update-DR
5
Update-IR
D
0
0
0
1
1
0
0
1
1
1
1
0
0
1
1
1
1
1
0
0
0
0
0
1
10
0
1
1
1
0
0



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