SCPS286 July   2025 TPLD2001

ADVANCE INFORMATION  

  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 I2C Bus Timing Requirements
    9. 5.9 SPI Timing Requirements
  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 or D Flip-Flop/Latch macro-cell
          1. 7.3.3.1.1 2-Bit LUT
          2. 7.3.3.1.2 D Flip-Flop/Latch
        2. 7.3.3.2 2-Bit LUT or Pattern Generator macro-cell
          1. 7.3.3.2.1 2-Bit LUT
          2. 7.3.3.2.2 Pattern Generator
        3. 7.3.3.3 3-Bit LUT or D Flip-Flop/Latch with Reset/Set macro-cell
          1. 7.3.3.3.1 3-Bit LUT
          2. 7.3.3.3.2 D Flip-Flop/Latch with Reset/Set
        4. 7.3.3.4 3-Bit LUT or D Flip-Flop/Latch or Shift Register macro-cell
          1. 7.3.3.4.1 3-Bit LUT
          2. 7.3.3.4.2 D Flip-Flop/Latch with Reset/Set
          3. 7.3.3.4.3 8-Bit Shift Register
        5. 7.3.3.5 4-Bit LUT or D Flip-Flop/Latch with Reset/Set macro-cell
          1. 7.3.3.5.1 4-Bit LUT
          2. 7.3.3.5.2 D Flip-Flop/Latch with Reset/Set
      4. 7.3.4  Configurable Logic and Timing blocks
        1. 7.3.4.1 3-Bit LUT
        2. 7.3.4.2 D Flip-Flop/Latch with Reset/Set
        3. 7.3.4.3 Counters/Delay Generators (CNT/DLY)
          1. 7.3.4.3.1 Delay Mode
          2. 7.3.4.3.2 Reset Counter Mode
          3. 7.3.4.3.3 One-Shot Mode
          4. 7.3.4.3.4 Frequency Comparator Mode
          5. 7.3.4.3.5 Edge Detector Mode
          6. 7.3.4.3.6 Delayed Edge Detector Mode
        4. 7.3.4.4 LUT/DFF + CNT modes
      5. 7.3.5  Programmable Deglitch Filter or Edge Detector
      6. 7.3.6  Deglitch Filter or Edge Detector
      7. 7.3.7  State Machine (SM)
        1. 7.3.7.1 State Machine Inputs
        2. 7.3.7.2 State Machine Outputs
        3. 7.3.7.3 Configuring the State Machine
        4. 7.3.7.4 State Machine Timing Considerations
      8. 7.3.8  8-Bit Counters/Delay Generators/Finite State Machines
      9. 7.3.9  PWM Generators
      10. 7.3.10 Watchdog Timer
      11. 7.3.11 Analog Comparators
        1. 7.3.11.1 Discrete Analog Comparator (ACMP)
        2. 7.3.11.2 Multi-channel Analog Comparator (McACMP)
      12. 7.3.12 Voltage Reference (VREF)
      13. 7.3.13 Analog Temperature Sensor (TS)
      14. 7.3.14 Analog Multiplexer (AMUX)
      15. 7.3.15 Oscillators
        1. 7.3.15.1 2kHz Fixed Frequency Oscillator
        2. 7.3.15.2 2MHz Fixed Frequency Oscillator
        3. 7.3.15.3 25MHz Fixed Frequency Oscillator
        4. 7.3.15.4 Oscillator Power Modes
      16. 7.3.16 Serial Communications
        1. 7.3.16.1 I2C Mode
        2. 7.3.16.2 SPI Mode
        3. 7.3.16.3 Virtual I/Os
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power-On Reset
      2. 7.4.2 Power Supply Control Modes
      3. 7.4.3 Protection Features
        1. 7.4.3.1 Device Read/Write Lock
        2. 7.4.3.2 OTP Cyclic Redundancy Check (CRC)
      4. 7.4.4 Programming
        1. 7.4.4.1 Selectable I2C/SPI Interface
        2. 7.4.4.2 One-Time Programmable Memory (OTP)
        3. 7.4.4.3 Intel HEX File Format
        4. 7.4.4.4 TPLD2001 Registers
          1. 7.4.4.4.1 TPLD2001_User Registers
          2. 7.4.4.4.2 TPLD2001_Cfg_0 Registers
          3. 7.4.4.4.3 TPLD2001_Cfg_1 Registers
  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
    1. 11.1 Tape and Reel Information
    2. 11.2 Mechanical Data

7.3.10 Watchdog Timer

The watchdog timer (WDT) macro-cell monitors the input into the macro-cell for any edge (rising or falling) in the time frame defined by the tWD time period. The WDT macro-cell has 2 inputs from the connection mux: 1 active-high enable and 1 watchdog input. There is also 1 clock input directly from the internal oscillators.

TPLD2001 Watchdog Timer Block Diagram Figure 7-40 Watchdog Timer Block Diagram

The following can be configured for an operating WDT: the timeout period (tWD), the output assert time (tWDO), the clock source, an additional clock divider option, behavior of WDT while disabled.

  • Timeout period (tWD): The WDT operates on an 8-bit counter and supports count data values of 5 to 255.

  • Output assert time (tWDO): A separate 8-bit counter controls the output assertion time period, supporting count data values of 1 to 255.

  • Clock source: OSC0, a divided clock derived from OSC0 (/8, /64, /512, /4096, /32768, /262144), OSC1, a divided clock derived from OSC1 (/8, /64, /512), OSC2, or a divided clock derived from OSC2 (/4).

  • Additional clock division: An additional clock divide by 100 can be toggled to further extend the timeout period.

  • Behavior while disabled: Users can set the counter to reset to the specified count data when the WDT is disabled or to pause the counter and resume once the WDT is re-enabled.

When a timeout condition is reached, the WDT macro-cell outputs a Low pulse for the specified amount of time.

Note: For unused watchdog timer macro-cell, set the clock selection (CLK_SEL) to External CLK from CMX to reduce excess current draw.
TPLD2001 Watchdog timer output timing example (reset count when disabled) Figure 7-41 Watchdog timer output timing example (reset count when disabled)
TPLD2001 Watchdog timer output timing example (pause count when disabled) Figure 7-42 Watchdog timer output timing example (pause count when disabled)