Measurement Computing PCI-CTR05 - Manual (Page 14)

PCI-CTR05 User's Guide Specifications
14
Table 3. Counter specifications
Parameter Conditions
Counter type 9513
Configuration One 9513 device. Five up/down counters, 16-bits each.
Compatibility 5V/TTL
The 9513 device is programmable for:
Clock source Software selectable:
External:
 Counter 1-5 clock inputs
 Counter 1-5 gate inputs
Internal:
 Terminal count of previous counter
 X2 clock frequency scaler
Gate: Software selectable source:
External (default logic high):
 Active high or low level or edge, counter 1 – 5 gate input
 Active high level previous gate or next gate
 All external gate signals (CTRxGATE) individually pulled up through
10 KΩ resistors to +5 V.
Internal:
 Active high previous counter terminal count
 No gating.
Output: Software selectable:
 Always low
 High pulse on terminal count
 Low pulse on terminal count
 Toggle on terminal count
 Inactive, high impedance at user connector counter # output.
Osc Out Software selectable source:
 Counter # input
 Gate # input
 Prescaled clock source (X2 clock frequency scaler)
Software selectable divider:
 Division by 1-16
Software selectable enable:
 On or low impedance to ground.
Clock input frequency 6.8 MHz max (145 ns min period)
X2 clock input sources Software selectable:
 1.0 MHz (10 MHz Xtal divided by 10)
 5.0 MHz (10 MHz Xtal divided by 2)
X2 clock frequency scaler BCD scaling (X2 divided by 10, 100, 1000 or 10000) or binary scaling
(X2 divided by 16, 256, 4096 or 65536)
High pulse width (clock input) 70 ns min
Low pulse width (clock input) 70 ns min
Gate width high 145 ns min
Gate width low 145 ns min
Input low voltage -0.5 V to 0.8 V max
Input high voltage 2.2 V min, Vcc max
Output low voltage @ IIl=3.2 mA 0.4 V max
Output high voltage @ IIH= -200 uA 2.4 V min
Crystal oscillator frequency 10 MHz
Frequency accuracy 50 ppm