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PM0020 Datasheet(PDF) 70 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) 70 Page - STMicroelectronics

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ISC logic description
PM00020
70/87
that drive the output pins are updated on the falling edge of the TCK in the Update-DR state.
Input signals from external sources are sampled on the rising edge of TCK in the Capture-
DR state. Typically, a SAMPLE/PRELOAD instruction is performed prior to EXTEST to pre-
load the values, which will drive the component outputs.
12.5.6
INTEST
The optional INTEST instruction places the IC in an internal boundary-test mode and
selects the boundary-scan register to be connected between TDI and TDO. During this
instruction, the boundary-scan register is accessed to drive test data on-chip via the
boundary inputs and receive test data on-chip via the boundary outputs.
12.5.7
IDCODE
Description:
Shift out hardwired silicon signature
Requirement:
None
Register:
Device-ID
Shift-In:
32 bits don't care
Shift-Out:
32 bits ID-Code
Mode:
ISC and PSD
Security:
Fully functional
Table 32.
IDCODE sequence
Step
Tap activity
Comment
0
Run-Test/Idle
Start
1
IR-Scan
Load IDCODE
2
DR-Scan
IDCODE shift out
3
Run-Test/Idle
End



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