參數(shù)資料
型號: SN74ABT18640DGGR
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, INVERTED OUTPUT, PDSO56
封裝: GREEN, PLASTIC, TSSOP-56
文件頁數(shù): 2/32頁
文件大?。?/td> 638K
代理商: SN74ABT18640DGGR
SN54ABT18640, SN74ABT18640
SCAN TEST DEVICES
WITH 18-BIT INVERTING BUS TRANSCEIVERS
SCBS267C – FEBRUARY 1994 – REVISED JULY 1996
10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
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 00000000000000001110000000101111 (0000E02F, hex) is captured in
the IDR to identify this device as Texas Instruments SN54/74ABT18640. 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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