Measurement Computing USB-4302 - Manual (Page 22)

22
Chapter 4
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Counter
Refer to the CTS9513-2 data sheet for complete 9513 specifications and operating modes. The CTS9513-2 data
sheet is available on our web site at www.mccdaq.com/PDFmanuals/9513A.pdf .
Table 1. 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
 Internal clock frequency scaler (default; divided by 1)
Gate Software selectable source:
External:

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 47 K
resistors to +5 V.
Internal:

Active high previous counter terminal count
 No gating (default)
Output Software selectable:

Always low (default)
 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 internal clock (default)
Software selectable divider:

Division by 1-16 (default = 16)
Clock input frequency 20 MHz max (50 nS min period)
Internal clock frequencies
(Generated from 12 MHz crystal
oscillator.)
Software selectable:

5.0000 MHz (default)
 3.3333 MHz
 1.6667 MHz
 1.0000 MHz
Internal clock frequency prescaler BCD scaling (Internal clock divided by 1, 10, 100, 1000 or 10000) or
Binary scaling (Internal clock divided by 1, 16, 256, 4096 or 65536)
Internal clock generator accuracy ±2 ppm