SCANSTA111SM National Semiconductor, SCANSTA111SM Datasheet - Page 12

• Manufacturer Part Number: SCANSTA111SM
• Manufacturer: National Semiconductor

Specifications of SCANSTA111SM

• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Package Type: FBGA
• Rad Hardened: No
• Lead Free Status / RoHS Status: Not Compliant

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Level 2 Protocol
Once the SCANSTA111 has been successfully addressed
and selected, its internal registers may be accessed via Lev-
el-2 Protocol. Level-2 Protocol is compliant to IEEE Std.
1149.1 TAP protocol with one exception: if the 'STA111 is se-
lected via the Broadcast or Multi-Cast address, TDO
ways TRI-STATED. (The TDO
this way to prevent bus contention.) Upon being selected,
(i.e., the 'STA111 Selection controller transitions from the
Wait-For-Address state to one of the Selected states), each
of the local scan ports (LSP
in one of the following four TAP Controller states: Test-Logic-
Reset, Run-Test/Idle, Pause-DR, or Pause-IR and the active
scan chain consists of: TDI
(or the IDCODE register) and out through TDO
TDI
The UNPARK instruction (described later) is used to insert
one or more local scan ports into the active scan chain.
B
→
Instruction Register
B
0
→
through the instruction register
, LSP
B
TDO
buffer must be implemented
1
B
, LSP
2
) remains parked
B
.
B
Table
is al-
12
7
in what order.
LEVEL 2 INSTRUCTION TYPES There are two types of in-
structions (reference
1.
2.
describes which local ports are inserted into the chain, and
Instructions that insert a 'STA111 register into the active
scan chain so that the register can be captured or
updated (BYPASS, SAMPLE/PRELOAD, EXTEST, ID-
CODE, MODESEL, MCGRSEL, LFSR-SEL,
CNTRSEL).
Instructions that configure local ports or control the
operation of the linear feedback shift register and counter
registers (UNPARK, PARKTRL, PARKRTI, PARK-
PAUSE, GOTOWAIT, SOFTRESET, LFSRON,
LFSROFF, CNTRON, CNTROFF). These instructions,
along with any other yet undefined Op-Codes, will cause
the device identification register to be inserted into the
active scan chain.
Table
5):