Moteur de recherche de fiches techniques de composants électroniques |
|
SN74BCT8373DW Fiches technique(PDF) 9 Page - Texas Instruments |
|
SN74BCT8373DW Fiches technique(HTML) 9 Page - Texas Instruments |
9 / 21 page SN74BCT8373 SCAN TEST DEVICE WITH OCTAL DTYPE LATCHES SCBS471 − JUNE 1990 − REVISED JUNE 1994 2−9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 data register description boundary-scan register The boundary-scan register (BSR) is 18 bits long. It contains one boundary-scan cell (BSC) for each normal-function input pin and one BSC for each normal-function output pin. The BSR is used 1) to store test data that is to be applied internally to the inputs of the normal on-chip logic and/or externally to the device output terminals, and/or 2) to capture data that appears internally at the outputs of the normal on-chip logic and/or externally at the device input terminals. The source of data to be captured into the BSR during Capture-DR is determined by the current instruction. The contents of the BSR may change during Run-Test/Idle as determined by the current instruction. The contents of the BSR are not changed in Test-Logic-Reset. The BSR order of scan is from TDI through bits 17−0 to TDO. Table 1 shows the BSR bits and their associated device pin signals. Table 1. Boundary-Scan-Register Configuration BSR BIT NUMBER DEVICE SIGNAL BSR BIT NUMBER DEVICE SIGNAL BSR BIT NUMBER DEVICE SIGNAL 17 LE 15 1D 7 1Q 16 OE 14 2D 6 2Q − − 13 3D 5 3Q − − 12 4D 4 4Q − − 11 5D 3 5Q − − 10 6D 2 6Q − − 9 7D 1 7Q − − 8 8D 0 8Q boundary-control register The boundary-control register (BCR) is two bits long. The BCR is used in the context of the RUNT instruction to implement additional test operations not included in the basic SCOPE instruction set. Such operations include PRPG and PSA. Table 3 shows the test operations that are decoded by the BCR. During Capture-DR, the contents of the BCR are not changed. At power up or in Test-Logic-Reset, the BCR is reset to the binary value 10, which selects the PSA test operation. The BCR order of scan is illustrated in Figure 3. TDO TDI Bit 0 (LSB) Bit 1 (MSB) Figure 3. Boundary-Control Register Order of Scan |
Numéro de pièce similaire - SN74BCT8373DW |
|
Description similaire - SN74BCT8373DW |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |