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參數(shù)資料
| 型號： | SN74ABT8646DWR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | ABT SERIES, 8-BIT BOUNDARY SCAN REG TRANSCEIVER, TRUE OUTPUT, PDSO28 |
| 封裝： | GREEN, PLASTIC, SOIC-28 |
| 文件頁數(shù)： | 8/32頁 |
| 文件大?。?/td> | 529K |
| 代理商： | SN74ABT8646DWR |
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SN54ABT8646, SN74ABT8646
SCAN TEST DEVICES WITH
OCTAL BUS TRANSCEIVERS AND REGISTERS
SCBS123F AUGUST 1992 REVISED APRIL 2004
16
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
parallel-signature analysis (PSA)
Data appearing at the selected device input pins is compressed into a 16-bit parallel signature in the
shift-register elements of the selected BSCs on each rising edge of TCK. This data is updated in the shadow
latches of the selected input BSCs and applied to the inputs of the normal on-chip logic. Data in the shadow
latches of the selected output BSCs remains constant and is applied to the device outputs. Figures 7 and 8 show
the 16-bit linear-feedback shift-register algorithms through which the signature is generated. An initial seed
value should be scanned into the BSR before performing this operation.
=
MASKX
A8-I
B8-O
A7-I
A6-I
A5-I
A4-I
A3-I
A2-I
A1-I
B7-O
B6-O
B5-O
B4-O
B3-O
B2-O
B1-O
Figure 7. 16-Bit PSA Configuration (OEA = 0, OEB = 1)
=
MASKX
B8-I
A8-O
B7-I
B6-I
B5-I
B4-I
B3-I
B2-I
B1-I
A7-O
A6-O
A5-O
A4-O
A3-O
A2-O
A1-O
Figure 8. 16-Bit PSA Configuration (OEA = 1, OEB = 0)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SN74ABT8646DWRE4 | 功能描述:特定功能邏輯 Device w/Octal Bus Trnscvr & Register RoHS:否 制造商:Texas Instruments 產(chǎn)品: 系列:SN74ABTH18502A 工作電源電壓:5 V 封裝 / 箱體:LQFP-64 封裝:Tube |
| SN74ABT8646DWRG4 | 功能描述:特定功能邏輯 Scan Test Devices RoHS:否 制造商:Texas Instruments 產(chǎn)品: 系列:SN74ABTH18502A 工作電源電壓:5 V 封裝 / 箱體:LQFP-64 封裝:Tube |
| SN74ABT8652DL | 功能描述:特定功能邏輯 Device w/Octal Bus Trnscvr & Register RoHS:否 制造商:Texas Instruments 產(chǎn)品: 系列:SN74ABTH18502A 工作電源電壓:5 V 封裝 / 箱體:LQFP-64 封裝:Tube |
| SN74ABT8652DLG4 | 功能描述:特定功能邏輯 Device w/Octal Bus Trnscvr & Register RoHS:否 制造商:Texas Instruments 產(chǎn)品: 系列:SN74ABTH18502A 工作電源電壓:5 V 封裝 / 箱體:LQFP-64 封裝:Tube |
| SN74ABT8652DLR | 功能描述:特定功能邏輯 Device w/Octal Bus Trnscvr & Register RoHS:否 制造商:Texas Instruments 產(chǎn)品: 系列:SN74ABTH18502A 工作電源電壓:5 V 封裝 / 箱體:LQFP-64 封裝:Tube |
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