Peripheral Simulation

For Silicon Laboratories, Inc. C8051F121 — Capture/Compare

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.

Capture / Compare Register Dialog

The Capture/Compare Register Dialog controls simulation all of the six operation modes of the PCA0 capture/compare module.

Selected Module

• Mode is the mode for the selected capture compare register.
• PCA0CPn (PCA Capture Module Register) hold the data used for capture and compare functions.
• PCA0CPMn (PCA0 Capture/Compare Mode Registers)
• CCFn (Module n Capture/Compare Flag) is set when a match or capture occurs fro module n.
• PWM16n (16-bit Pulse Width Modulation Enable) is set to select 16-bit PWM. If reset, 8-bit PWM is selected.
• ECOMn (Comparator Function Enable) is set to enable the comparator function.
• CAPPn (Capture Positive Function Enable) is set to enable the positive edge capture function.
• CAPNn (Capture Positive Function Enable) is set to enable the negative edge capture function.
• MATn (Match Function Enable) is set to enable the match function.
• TOGn (Toggle Function Enable) is set to toggle the CEXn pin when a match occurs.
• PWMn (Pulse Width Modulation Mode Enable) is set to enable Pulse Width Modulation output on the CEXn pin.
• ECCFn (Capture/Compare Flag Interrupt Enable) is set to enable the compare/capture flag interrupt.

CPxN VTREG
Data Type: float

CPxN is the negative input voltage for Comparator x. x is the Comparator number, 0 or 1. Typing the following command in the debugger's Command Window sets the negative input voltage for Comparator 1 to 1.5 volts:

CP1N = 5.5

You may display the Comparator 0 negative input voltage in the debugger's Output Window by typing the following command:

CP0N

CPxP VTREG
Data Type: float

CPxN is the positive input voltage for Comparator x. x is the Comparator number, 0 or 1. Typing the following command in the debugger's Command Window sets the positive input voltage for Comparator 0 to 0.75 volts:

CP0P = 0.75

You may display the Comparator 1 positive input voltage in the debugger's Output Window by typing the following command:

CP1P