 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
OR2T10A Datasheet(PDF) 6 Page - Lattice Semiconductor |
|
||||||||||||||||||||||||||||||
OR2T10A Datasheet(HTML) 6 Page - Lattice Semiconductor |
|
|
6 / 192 page  Data Sheet ORCA Series 2 FPGAs January 2002 6 Lattice Semiconductor Programmable Logic Cells (continued)) Key: C = controlled by configuration RAM. Figure 3. Simplified PFU Diagram 5-4573(F) A4 A3 A2 A1 A4 A3 A2 A1 QLUT3 A0 CARRY CARRY A3 A2 A1 A0 QLUT2 B4 B3 B2 B1 B4 B3 B2 B1 QLUT1 B0 CARRY CARRY B3 B2 B1 B0 QLUT0 CIN C0 LSR GSR WD[3:0] CK CKEN TRI PFU_XOR B4 A4 PFU_NAND PFU_MUX C C C C WD3 WD2 WD1 WD0 C C C T T T T REG3 SR EN REG2 SR EN REG1 SR EN REG0 SR EN O4 O3 O2 O1 O0 F3 C C COUT F2 F1 F0 D0 D1 D2 D3 Q0 Q1 Q2 Q3 C T T T T C Figure 2 and Figure 3 show high-level and detailed views of the ports in the PFU, respectively. The ports are referenced with a two- to four-character suffix to a PFU’s location. As mentioned, there are two 5-bit input data buses (A[4:0] and B[4:0]) to the LUT, one 4-bit input data bus (WD[3:0]) to the latches/FFs, and an output data bus (O[4:0]). Figure 3 shows the four latches/FFs (REG[3:0]) and the 64-bit look-up table (QLUT[3:0]) in the PFU. The PFU does combinatorial logic in the LUT and sequential logic in the latches/FFs. The LUT is static random access memory (SRAM) and can be used for read/ write or read-only memory. The eight 3-state buffers found in each PLC are also shown, although they actu- ally reside external to the PFU. Each latch/FF can accept data from the LUT. Alterna- tively, the latches/FFs can accept direct data from WD[3:0], eliminating the LUT delay if no combinatorial function is needed. The LUT outputs can bypass the latches/FFs, which reduces the delay out of the PFU. It is possible to use the LUT and latches/FFs more or less independently. For example, the latches/FFs can be used as a 4-bit shift register, and the LUT can be used to detect when a register has a particular pattern in it. |
Similar Part No. - OR2T10A |
|
Similar Description - OR2T10A |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | 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
