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Peripheral Simulation

For Infineon XC878C-13FF — External Interrupt Inputs + NMI Control

Simulation support for this peripheral or feature is comprised of:

  • Dialog boxes which display and allow you to change peripheral configuration.
  • VTREGs (Virtual Target Registers) which support I/O with the peripheral.

These simulation capabilities are described below.

External / NMI Control Dialog

External / NMI Control

The External / NMI Control Dialog shows the current state of the on-chip external interrupt and non-maskable interrupt controllers. You may change the configuration of these controllers using the controls in this dialog.

External

  • EXICON0 (External Interrupt Control Register 0) holds the parameters that control the external interrupts 0-3 (EXINT0-EXITN3).
  • EXICON1 (External Interrupt Control Register 1) holds the parameters that control the external interrupts 4-6 (EXINT4-EXITN6).
  • EXINTx (External Interrupts 0-6 Trigger Select) selects the interrupt to occur with a falling edge, rising edge or falling edge and rising edge.

NMI

  • NMICON (NMI Control Register) holds the following settings:
  • NMIWDT Enables the Watchdog Timer NMI.
  • NMIFLASH Enables the Flash Timer NMI.
  • NMIVDD VDD Prewarning NMI.
  • NMIECC Enables the Error Correction Code NMI.
  • NMIPLL Enables the Phase-Locked Loop Loss of Lock NMI.
  • NMIOCDS Enables the On-Chip Debug Support NMI.
  • NMIVDDP Enables the VDDP Prewarning NMI.
  • NMISR (NMI Status Register) holds the following status bits:
  • FNMIWDT (Watchdog Timer NMI Flag) is set when a watchdog timer prewarning occurs.
  • FNMIFLASH (Flash Timer NMI Flag) is set when the flash time overflows.
  • FNMIVDD (VDD Prewarning NMI Flag) is set when the VDD is below 2.3 volts.
  • FNMIECC (ECC NMI Flag) is set when an Error Correction Code error occurs.
  • FNMIPLL (PLL NMI Flag) when set, indicates that the Phase-Locked Loop has lost the lock on the external oscillator.
  • FNMIOCDS (OCDS NMI Flag) is set when a JTAG-receiving or user interrupt is requested in monitor mode.
  • FNMIVDDP (VDDP Prewarning NMI Flag) is set when the VDD is below 4.0 volts on 5.0 volt power.

Interrupt Request

  • IRCON0 (Interrupt Request Register 0) Bits 0-6 are set in this register to indicate an interrupt request is active for External Interrupt 0-6, respectively.
  • IRCON1 (Interrupt Request Register 1) indicates active requests for SSC Error(EIR), SSC Transmit(TIR), SSC Receive(RIR) and both ADC interrupts.

NMI VTREG
Data Type: unsigned char

THE NMI VTREG contains the state of the NMI pin on the simulated MCU. Normally, the NMI pin is high (indicating that there is no non-maskable interrupt condition). NMI goes low to signal a non-maskable interrupt. Enter the following in the Command window to trigger an NMI Trap using the NMI VTREG.

NMI=0

Enter the following to return the NMI pin to a high level.

NMI=1

Note that on some devices the NMI pin must be low to enter Power Down Mode.

Get more information about the
Peripheral Simulation Capabilities
of the µVision Debugger.
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