SCPS301 September   2024 TPLD801-Q1

ADVANCE INFORMATION  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Pin Configuration and Functions
  6. 5Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Supply Current Characteristics
    7. 5.7 Switching Characteristics
  7. 6Parameter Measurement Information
  8. 7Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 I/O Pins
      2. 7.3.2 Connection Mux
      3. 7.3.3 Configurable Use Logic Blocks
        1. 7.3.3.1 2-Bit LUT macro-cell
        2. 7.3.3.2 3-Bit LUT macro-cell
        3. 7.3.3.3 2-Bit LUT or D Flip-Flop/Latch macro-cell
        4. 7.3.3.4 3-Bit LUT or D Flip-Flop/Latch with Set/Reset macro-cell
        5. 7.3.3.5 3-Bit LUT or Pipe Delay macro-cell
        6. 7.3.3.6 4-Bit LUT or 8-Bit Counter/Delay macro-cell
      4. 7.3.4 8-Bit Counters and Delay Generators (CNT/DLY)
        1. 7.3.4.1 Delay Mode
        2. 7.3.4.2 Reset Counter Mode
      5. 7.3.5 Programmable Deglitch Filter or Edge Detector Macro-cell
      6. 7.3.6 Selectable Frequency Oscillator
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power-On Reset
    5. 7.5 Programming
      1. 7.5.1 One-Time Programmable Memory (OTP)
  9. 8Revision History
  10. 9Mechanical, Packaging, and Orderable Information
    1. 9.1 Packaging Option Addendum
    2. 9.2 Tape and Reel Information
    3. 9.3 Mechanical Data

7.3.3.5 3-Bit LUT or Pipe Delay macro-cell

This macro-cell can serve as either a 3-bit LUT or as a pipe delay.

TPLD801-Q1 3-bit LUT or Pipe delay block diagramFigure 7-6 3-bit LUT or Pipe delay block diagram

When used to implement LUT functions, the 3-bit LUT takes in three input signals from the connection mux and produces a single output, which goes back into the connection mux. These LUTs can be configured to any 3-input user defined function, including the following standard digital logic functions: AND, NAND, OR, NOR, XOR, XNOR, INV.

Table 7-11 shows the truth table for a 3-bit LUT.

Table 7-10 3-bit LUT Truth Table
IN2IN1IN0OUT
000

User defined

001
010
011
100
101
110
111

Each 3-bit LUT has 8 bits in the OTP to define their output function.

When used to implement a pipe delay, the three input signals from the connection mux go to the delay input (IN), clock (CLK), and reset (nRST) inputs for the flip-flop or latch, with two outputs going back to the connection mux. With this macro-cell, users can select the number of delay stages per output (from 1 to 8) and the output polarity for OUT1.

The pipe delay is an 8-stage delay composed of 8 DFFs. The DFF cells are tied in series where the output of each delay cell goes to the next DFF cell. There are delay output points for each set of the OUT0 and OUT1 outputs to a mux that is used to control the selection of the amount of delay for each pipe delay output.

For normal pipe delay functionality, the nRST input should be high. If nRST input is low, the pipe delay macro-cell is in a reset state and all outputs are low.

Figure 7-7 shows an example of the pipe delay macro-cell with 2 stages of delay selected.

TPLD801-Q1 Pipe Delay Macro-Cell Timing Example (Delay = 2)Figure 7-7 Pipe Delay Macro-Cell Timing Example (Delay = 2)