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參數(shù)資料
| 型號： | SCANSTA101 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | RES 30K OHM 1/16W 0.1% 0402 SMD |
| 中文描述： | 低壓主STA的IEEE 1149.1標(biāo)準(zhǔn) |
| 文件頁數(shù)： | 14/31頁 |
| 文件大小： | 403K |
| 代理商： | SCANSTA101 |
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Serial Scan Interface
(Continued)
The TDI_SM shifter unit consists of two 32-bit shift registers
as shown in
Figure 4
. The shift register on top will be used as
an LFSR register. However, before using the TDI_SM LFSR
register, the LFSR Exponent and LFSR Seed registers must
be written with valid data. The LFSR Exponent register must
be written with a 3-bit binary encoded value such that the
corresponding polynomial out of the five available polynomi-
als will be selected. The value written to the LFSR Seed
registers will be used to initialize the TDI_SM LFSR register
to a predetermined state. Once the test vector has com-
pletely scanned in, the final contents of the LFSR register will
be transferred to the LFSR Result registers. The 32-bit shift
register at the bottom will be used to shift in TDI_SM directly
in normal mode or to shift in TMS_SM or TDO_SM in the
loop-back mode. After shifting in every thirty two bits, the
contents of this register will be transferred to the correspond-
ing TDI memory location before the next shift operation.
SHIFTER IMPLEMENTATION
Shift register implementation is illustrated in
Figure 5
. Shift
out enable for the TMS_SM and TDO_SM shifters is gener-
ated by comparing the clock pulse counter output to the
clock divider - 1. Shift in enable for the TDI_SM shifter is
generated by comparing the clock pulse counter to program-
mable divisor/2 - 1. These enables are gated by the control
signals from SSIC so that data are shifted out (TMS_SM/
TDO_SM) or shifted in (TDI_SM) only when necessary.
10121523
FIGURE 4. TDI_SM Shifter
S
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SCANSTA101_06 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low Voltage IEEE 1149.1 STA Master |
| SCANSTA101SM | 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 |
| SCANSTA101SM/NOPB | 功能描述:接口 - 專用 Low Vltg IEEE 1149.1 Sys Test Access 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 |
| SCANSTA101SM/NOPB | 制造商:Texas Instruments 功能描述:Test Master IC |
| SCANSTA101SMX | 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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