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參數(shù)資料
| 型號： | SN74ABT18504PMRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | ABT SERIES, 20-BIT BOUNDARY SCAN REG TRANSCEIVER, TRUE OUTPUT, PQFP64 |
| 封裝： | GREEN, PLASTIC, LQFP-64 |
| 文件頁數(shù)： | 3/32頁 |
| 文件大?。?/td> | 505K |
| 代理商： | SN74ABT18504PMRG4 |
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SN54ABT18504, SN74ABT18504
SCAN TEST DEVICES WITH
20-BIT UNIVERSAL BUS TRANSCEIVERS
SCBS108B – AUGUST 1992 – REVISED JUNE 1993
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
11
data register description (continued)
The boundary-control register order of scan is from TDI through bits 22 – 0 to TDO. Table 2 shows the
boundary-control register bits and their associated test control signals.
Table 2. Boundary Control Register Configuration
BCR BIT
NUMBER
TEST
CONTROL
SIGNAL
BCR BIT
NUMBER
TEST
CONTROL
SIGNAL
BCR BIT
NUMBER
TEST
CONTROL
SIGNAL
22
MASK20
12
MASK10
2
OPCODE2
21
MASK19
11
MASK9
1
OPCODE1
20
MASK18
10
MASK8
0
OPCODE0
19
MASK17
9
MASK7
––
18
MASK16
8
MASK6
––
17
MASK15
7
MASK5
––
16
MASK14
6
MASK4
––
15
MASK13
5
MASK3
––
14
MASK12
4
MASK2
––
13
MASK11
3
MASK1
––
bypass register
The bypass register is a one-bit scan path that can be selected to shorten the length of the system scan path,
thereby 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 illustrated in Figure 3.
Bit 0
TDO
TDI
Figure 3. 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 00000000000000000111000000101111 (0000702F, hex) is captured in
the device identification register to identify this device as Texas Instruments SN54/74ABT18504, version 0.
The device identification register order of scan is from TDO through bits 31–0 to TDO. Table 3 shows the device
identification register bits and their significance.
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| SN74ABT18640 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SCAN TEST DEVICES WITH 18-BIT INVERTING BUS TRANSCEIVERS |
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| SN74ABT18640DGGR | 功能描述:特定功能邏輯 Device w/18-Bit Inv Bus Transceiver 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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