 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
OR4 Datasheet(PDF) 41 Page - Lattice Semiconductor |
|
|
|||||||||||||||||||||||||||||
OR4 Datasheet(HTML) 41 Page - Lattice Semiconductor |
|
|
41 / 152 page  Data Sheet May, 2006 Lattice Semiconductor 41 ORCA Series 4 FPGAs Special Function Blocks (continued) 5-6765(F) Figure 26. Boundary-Scan Interface D[7:0] INTR MICRO- PROCESSOR D[7:0] CE RA R/W DAV INT SP TMS0 TCK TDI TDO TDI TMS TCK TDO ORCA SERIES FPGA TDI ORCA SERIES FPGA TMS TCK TDO TDI TMS TCK TDO ORCA SERIES FPGA BOUNDARY- SCAN MASTER (BSM) (DUT) (DUT) (DUT) The boundary-scan support circuit shown in Figure 26 is the 497AA boundary-scan master (BSM). The BSM off-loads tasks from the test host to increase test throughput. To interface between the test host and the DUTs, the BSM has a general MPI and provides paral- lel-to-serial/serial-to-parallel conversion, as well as three 8K data buffers. The BSM also increases test throughput with a dedicated automatic test-pattern generator and with compression of the test response with a signature analysis register. The PC-based boundary-scan test card/software allows a user to quickly prototype a boundary-scan test setup. Boundary-Scan Instructions The Series 4 boundary-scan circuitry supports a total of 18 instructions. This includes ten IEEE 1149.1, 1149.2, and 1532/D1 instructions, one optional IEEE 1149.3 instruction, two IEEE 1532/D1 optional instruc- tions, and five ORCA-defined instructions. There are also 16 other scan chain instructions that are used only during factory device testing and will not be discussed in this data sheet. A 6-bit wide instruction register sup- ports all the instructions listed in Table 18. The BYPASS instruction passes data intentionally from TDI to TDO after being clocked by TCK. Table 18. Boundary-Scan Instructions Code Instruction 000000 EXTEST 000001 SAMPLE 000011 PRELOAD 000100 RUNBIST 000101 IDCODE 000110 USERCODE 001000 ISC_ENABLE 001001 ISC_PROGRAM 001010 ISC_NOOP 001011 ISC_DISABLE 001101 ISC_PROGRAM_USERCODE 001110 ISC_READ 010001 PLC_SCAN_RING1 010010 PLC_SCAN_RING2 010011 PLC_SCAN_RING3 010100 RAM_WRITE 010101 RAM_READ 111111 BYPASS |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
