Peripheral Simulation

For NXP (founded by Philips) LPC2105/01 — Watchdog Timer

Simulation support for this peripheral or feature is comprised of:

• Dialog boxes which display and allow you to change peripheral configuration.

These simulation capabilities are described below.

Watchdog Dialog

The Watchdog Timer Dialog shows the current state of the on-chip Watchdog Timer. You can change the Watchdog Timer settings using the controls in this dialog.

Mode Register

• WDMOD (Watchdog Mode Register) contains the Watchdog Timer mode (Debug or Operate) and status bits of the Watchdog Timer.
• WDEN (Watchdog Timer Enable)is set to enable the Watchdog Timer interrupt.
• WDRESET (Watchdog Timer Reset) is set to reset the Watchdog Timer.
• WDTOF (Watchdog Timer Time-Out Flag) is set when the Watchdog Timer times out.
• WDINT (Watchdog Timer Interrupt Flag) is set when a Watchdog Timer interrupt occurs.

Time Constant and Value

• WDTC (Watchdog Timer Constant Register) contains the time-out value used to reload the Watchdog Timer.
• WDTV (Watchdog Timer Value Register) contains the current value of the Watchdog Timer.

Feed Register

• WDFEED (Watchdog Timer Feed Sequence Register) is used to reload the Watchdog Timer. Writing 0xAA followed by 0x55 to this register reloads the Watchdog Timer to its preset value.