參數(shù)資料
型號(hào)： SCANPSC110FSC
廠商： FAIRCHILD SEMICONDUCTOR CORP
元件分類(lèi)： 微控制器/微處理器
英文描述： SCAN Bridge Hierarchical and Multidrop Addressable JTAG Port (IEEE1149.1 System Test Support)
中文描述： SPECIALTY MICROPROCESSOR CIRCUIT, PDSO28
封裝： 0.300 INCH, MS-013, SOIC-28
文件頁(yè)數(shù)： 16/25頁(yè)
文件大?。?/td> 283K
代理商： SCANPSC110FSC
www.fairchildsemi.com
16
S
Special Features
(Continued)
This moves the local chain TAP Controllers to the synchro-
nization state
(Run-Test/Idle)
, where they stay until syn-
chronization occurs. If the next state of the SCANPSC110F
TAP Controller is
Run-Test/Idle
, TMS
L
is connected to
TMS
B
and the local TAP Controllers are synchronized to
the SCANPSC110F TAP Controller as shown in Figure 12.
If the next state after
Update-IR
were
Select-DR
, TMS
L
would remain LOW and synchronization would not occur
until the SCANPSC110F TAP Controller entered the
Run-
Test/Idle
state, as shown in Figure 11.
Each local port has its own Local Scan Port Controller. This
is necessary because the LSPN can be configured in any
one of eight (8) possible combinations. Either one, some,
or all of the local ports can be accessed simultaneously.
Configuring the LSPN is accomplished with the mode reg-
ister, in conjunction with the
UNPARK
instruction.
The LSPN can be unparked in one of seven different con-
figurations, as specified by bits 0-2 of the mode register.
Using multiple ports presents not only the task of synchro-
nizing the SCANPSC110F TAP Controller with the TAP
Controllers of an individual local port, but also of synchro-
nizing the individual local ports to one another.
When multiple local ports are selected for access, it is pos-
sible that two ports are parked in different states. This
could occur when previous operations accessed the two
ports separately and parked them in the two different
states. The LSP Controllers handle this situation gracefully.
Figure 12 shows the
UNPARK
instruction being used to
access LSP
1
, LSP
2
, and LSP
3
in series (mode register
=
“
XXX0X111
”
binary). LSP
1
and LSP
2
become active as the
SCANPSC110F controller is sequenced through the
Run-
Test/Idle
state. LSP
3
remains parked in the
Pause-DR
state until the SCANPSC110F TAP Controller is sequenced
through the
Pause-DR
state. At that point, all three local
ports are synchronized for access via the active scan
chain.
FIGURE 12. Synchronization of the Three Local Scan Ports (LSP
1
, LSP
2
, and LSP
3
)
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SCANSTA101SM/NOPB 功能描述:接口 - 專(zhuān)用 Low Vltg IEEE 1149.1 Sys Test Access RoHS:否 制造商:Texas Instruments 產(chǎn)品類(lèi)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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