SCPS295A September   2024  – July 2025 TPLD801

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    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
    8. 5.8 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 I/O Pins
        1. 7.3.1.1 Input Modes
        2. 7.3.1.2 Output Modes
        3. 7.3.1.3 Pull-Up or Pull-Down Resistors
      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 Edge Detector Mode
        3. 7.3.4.3 Reset Counter Mode
      5. 7.3.5 Programmable Deglitch Filter or Edge Detector Macro-Cell
      6. 7.3.6 Selectable Frequency Oscillator
        1. 7.3.6.1 Oscillator Power Modes
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power-On Reset
        1. 7.4.1.1 GPIO Quick Charge
        2. 7.4.1.2 Initialization
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
        1. 8.2.1.1 Power Considerations
        2. 8.2.1.2 Input Considerations
        3. 8.2.1.3 Output Considerations
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.3.3.6 4-Bit LUT or 8-Bit Counter/Delay Macro-Cell

This macro-cell can serve as either a 4-bit LUT or as a counter/delay generator (CNT/DLY).

TPLD801 4-bit LUT or 8-bit CNT/DLY Block Diagram Figure 7-8 4-bit LUT or 8-bit CNT/DLY Block Diagram

When used to implement LUT functions, the 4-bit LUT takes in four input signals from the connection mux and produces a single output, which goes back into the connection mux. This LUT can be configured to any 4-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 4-bit LUT.

Table 7-11 4-bit LUT Truth Table
IN3 IN2 IN1 IN0 OUT
0 0 0 0

User defined
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1

Each 4-bit LUT has 16 bits in the OTP to define their output function.

When used to implement 8-bit counter/delay function, the two input signals from the connection mux go to the clock (CLK) and reset (RST/DLY IN) for the counter/delay macro-cell, with the output going back to the connection mux. As a counter, the macro-cell counts to the given data value and generates a pulse when it reaches the set value or is reset. As a delay, it postpones rising and/or falling edges for the duration that is a function of the register value.

For more information on CNT/DLY macro-cell, see Section 7.3.4.