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| 型號： | SCANSTA111 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Enhanced SCAN bridge Multidrop Addressable IEEE 1149.1 (JTAG) Port |
| 中文描述： | 增強掃描橋梁多點尋址的IEEE 1149.1（JTAG接口）端口 |
| 文件頁數(shù)： | 2/29頁 |
| 文件大?。?/td> | 524K |
| 代理商： | SCANSTA111 |
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TABLE 1. Glossary
LFSR
Linear Feedback Shift Register. When enabled, will generate a 16-bit signature of sampled serial test
data.
Local Scan Port. A four signal port that drives a local (i.e. non-backplane) scan chain. (e.g., TCK
0
, TMS
0
,
TDO
0
, TDI
0
).
Local is used to describe IEEE Std. 1149.1 compliant scan rings and the SCANSTA111 Test Access Port
that drives them. The term local was adopted from the system test architecture that the ’STA111 will most
commonly be used in; namely, a system test backplane with a ’STA111 on each card driving up to 3 local
scan rings per card. (Each card can contain multiple ’STA111s, with 3 local scan ports per ’STA111.)
Park/Unpark/Unparked Parked, unpark, and unparked, are used to describe the state of the LSP controller and the state of the
local TAP controllers (the local TAP controllers refers to the TAP controllers of the scan components that
make up a local scan ring). Park is also used to describe the action of parking a LSP (transitioning into
one of the Parked LSP controller states). It is important to understand that when a LSP controller is in
one of the parked states, TMS
n
is held constant, thereby holding or parking the local TAP controllers in a
given state.
TAP
Test Access Port as defined by IEEE Std. 1149.1.
Selected/Unselected
Selected and Unselected refers to the state of the ’STA111 Selection Controller. A selected ’STA111 has
been properly addressed and is ready to receive Level 2 protocol. Unselected ’STA111s monitor the
system test backplane, but do not accept Level 2 protocol (except for the
GOTOWAIT
instruction). The
data registers and LSPs of unselected ’STA111s are not accessible from the system test master.
Active Scan Chain
The Active Scan Chain refers to the scan chain configuration as seen by the test master at a given
moment. When a ’STA111 is selected with all of its LSPs parked, the active scan chain is the current
scan register only. When a LSP is unparked, the active scan chain becomes: TDI
B
→
the current ’STA111
register
→
the local scan ring registers
→
a PAD bit
→
TDO
B
. Refer to
Table 7
for Unparked
configurations of the LSP network.
Level 1 Protocol
Level 1 is the protocol used to address a ’STA111.
Level 2 Protocol
Level 2 is the protocol that is used once a ’STA111 is selected. Level 2 protocol is IEEE Std. 1149.1
compliant when an individual ’STA111 is selected.
PAD
A one bit register that is placed at the end of each local scan port scan-chain. The PAD bit eliminates the
prop delay that would be added by the ’STA111 LSPN logic between TDI
n
and TDO
(n+1)
or TDO
B
by
buffering and synchronizing the LSP TDI inputs to the falling edge of TCK
B
, thus allowing data to be
scanned at higher frequencies without violating set-up and hold times.
LSB
Least Significant Bit, the right-most position in a register (bit 0).
MSB
Most Significant Bit, the left-most position in a register.
LSP
Local
S
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SCANSTA111MT | Enhanced SCAN bridge Multidrop Addressable IEEE 1149.1 (JTAG) Port |
| SCANSTA112 | 7-port Multidrop IEEE 1149.1 (JTAG) Multiplexer |
| SCANSTA112SM | 7-port Multidrop IEEE 1149.1 (JTAG) Multiplexer |
| SCANSTA112VS | 7-port Multidrop IEEE 1149.1 (JTAG) Multiplexer |
| SCANSTA476 | Eight Input IEEE 1149.1 Analog Voltage Monitor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SCANSTA111_05 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Enhanced SCAN bridge Multidrop Addressable IEEE 1149.1 (JTAG) Port |
| SCANSTA111MT | 功能描述:接口 - 專用 RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:BGA-59 |
| SCANSTA111MT/NOPB | 功能描述:接口 - 專用 RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:BGA-59 |
| SCANSTA111MT/NOPB | 制造商:Texas Instruments 功能描述:, Termination:Solder, Package/Case:48-TS |
| SCANSTA111MTX | 功能描述:接口 - 專用 RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:BGA-59 |
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