xPC Target    

PC-TIO-10 Counter FM

The PC-TIO-10 has two AM9513A chips each with 5 counters for a total of 10 counters on the board.

The PC-TIO-10 FM driver programs the AM9513A for FM (Frequency Modulation) signal generation (a square wave with fixed duty cycle and variable frequency).

Scaling Input to Output

Hardware Input
 Block Output Data Type
 Scaling
TTL
 double
 0 to 1

Driver Block Parameters

Counter - From the list, choose 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 to select which counter is used with this driver block. In each case, one block is needed for each counter.

Frequency Base - From the list, choose F1=1MHz, F2=100kHz, F3=10kHz, F4=1kHz, or F5=100Hz to set the base frequency.

Initial Relative Output Frequency. Enter a value between 0 and 1. The Initial Relative Output Frequency defines the initial output frequency of the FM-signal relative to the Frequency Base during driver initialization.

For example, if the initial output frequency of a square wave has to be 17.5 kHz, then choose F2=100kHz as the Frequency Base and enter 0.175 as the Initial Relative Output Frequency. 100kHz x 0.175 = 17.5 kHz

Duty Cycle - Enter a value between 0 and 1 to set the duty cycle. The Duty Cycle is held fixed during simulation.

Initial Toggle State - From the list, choose high or low. The Initial Toggle State sets the digital level (high or low) of the output. For example, if the Duty Cycle is 0.25 and the Initial Toggle State is High, the first 25% of the period will have a high-level and the last 75% will have a low-level.

Sample Time - Enter the base sample time or a multiple of the base sample time. The sample time indicates the update rate of registration on the input (Duty Cycle)

BaseAddress - Enter the base address of the board. This entry must corresponds to the DIP-switch settings on the board. For example, if the base address is 300 (hexadecimal), enter


 PC-TIO10 Counter PWM & ARM PC-TIO10 Counter FM & ARM