Specifications

14 National Instruments
14-22
Initial Duty Cycle - Enter a value between 0 and 1 to set the initial duty cycle.
The Duty Cycle defines the duty cycle at the initialization phase of the driver
similar to a initial value of an integrator.
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
Initial 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.
Initial ARM State - From the list, choose Disarmed or Armed. The Initial
ARM State defines if the counter should be armed or disarmed after driver
initialization. The ARM State during a simulation can be controlled by the
second block input. If a value 0 is asserted, the counter is disarmed. If a value
1 is asserted, the counter gets armed.
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
0x300
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).