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參數(shù)資料
| 型號： | SN74ABT18245ADGG |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | ABT SERIES, DUAL 9-BIT BOUNDARY SCAN TRANSCEIVER, TRUE OUTPUT, PDSO56 |
| 封裝： | PLASTIC, TSSOP-56 |
| 文件頁數(shù)： | 2/31頁 |
| 文件大?。?/td> | 438K |
| 代理商： | SN74ABT18245ADGG |
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SN54ABT18245A, SN74ABT18245A
SCAN TEST DEVICES
WITH 18-BIT BUS TRANSCEIVERS
SCBS110H – AUGUST 1992 – REVISED FEBRUARY 1999
10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
bypass register
The bypass register is a 1-bit scan path that can be selected to shorten the length of the system scan path,
reducing the number of bits per test pattern that must be applied to complete a test operation. During
Capture-DR, the bypass register captures a logic 0. The bypass register order of scan is shown in
Figure 4.
Bit 0
TDO
TDI
Figure 4. Bypass Register Order of Scan
device-identification register
The device-identification register (IDR) is 32 bits long. It can be selected and read to identify the manufacturer,
part number, and version of this device.
During Capture-DR, the binary value 00010000000000000101000000101111 (1000502F, hex) is captured in
the IDR to identify this device as Texas Instruments SN54/74ABT18245A. The IDR order of scan is from TDI
through bits 31–0 to TDO. Table 2 shows the IDR bits and their significance.
Table 2. Device-Identification Register Configuration
IDR BIT
NUMBER
IDENTIFICATION
SIGNIFICANCE
IDR BIT
NUMBER
IDENTIFICATION
SIGNIFICANCE
IDR BIT
NUMBER
IDENTIFICATION
SIGNIFICANCE
31
VERSION3
27
PARTNUMBER15
11
MANUFACTURER10
30
VERSION2
26
PARTNUMBER14
10
MANUFACTURER09
29
VERSION1
25
PARTNUMBER13
9
MANUFACTURER08
28
VERSION0
24
PARTNUMBER12
8
MANUFACTURER07
23
PARTNUMBER11
7
MANUFACTURER06
22
PARTNUMBER10
6
MANUFACTURER05
21
PARTNUMBER09
5
MANUFACTURER04
20
PARTNUMBER08
4
MANUFACTURER03
19
PARTNUMBER07
3
MANUFACTURER02
18
PARTNUMBER06
2
MANUFACTURER01
17
PARTNUMBER05
1
MANUFACTURER00
16
PARTNUMBER04
0
LOGIC1
15
PARTNUMBER03
14
PARTNUMBER02
13
PARTNUMBER01
12
PARTNUMBER00
Note that for TI products, bits 11–0 of the device-identification register always contain the binary value 000000101111
(02F, hex).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN74ABT18245ADGGR | 功能描述:特定功能邏輯 Scan Test Device 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 |
| SN74ABT18245ADL | 功能描述:特定功能邏輯 Scan Test Device 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 |
| SN74ABT18245ADLG4 | 功能描述:特定功能邏輯 Scan Test Device w/18-Bit Bus Trnscvr 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 |
| SN74ABT18245ADLR | 功能描述:特定功能邏輯 Scan Test Device 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 |
| SN74ABT18245ADLRG4 | 功能描述:特定功能邏輯 Scan Test Device 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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