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SCANSTA111 Datasheet(PDF) 12 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # SCANSTA111
Description  Enhanced SCAN bridge Multidrop Addressable IEEE 1149.1 (JTAG) Port
PDF  29 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

SCANSTA111 Datasheet(HTML) 12 Page - National Semiconductor (TI)

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Level 2 Protocol (Continued)
Pause-IR and the active scan chain consists of: TDI
B
through the instruction register (or the IDCODE register) and
out through TDO
B.
TDI
B → Instruction Register → TDOB
The UNPARK instruction (described later) is used to insert
one or more local scan ports into the active scan chain.
Table 7 describes which local ports are inserted into the
chain, and in what order.
LEVEL 2 INSTRUCTION TYPES There are two types of
instructions (reference Table 5):
1.
Instructions that insert a ’STA111 register into the active
scan chain so that the register can be captured or up-
dated (BYPASS, SAMPLE/PRELOAD, EXTEST, ID-
CODE, MODESEL, MCGRSEL, LFSR-SEL, CNTR-
SEL).
2.
Instructions that configure local ports or control the op-
eration of the linear feedback shift register and counter
registers
(UNPARK,
PARKTRL,
PARKRTI,
PARK-
PAUSE, GOTOWAIT, SOFTRESET, LFSRON, LFS-
ROFF, CNTRON, CNTROFF). These instructions, along
with any other yet undefined Op-Codes, will cause the
device identification register to be inserted into the ac-
tive scan chain.
www.national.com
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