Specifications; Counters - Measurement Computing PCI-CTR10 User Manual

Specifications

Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.

Counters

Refer to CTS9513-2 data sheet for complete 9513 specifications and operating modes. The SAVE command for
the CTS9513 device does not behave predictably when using clocks which are not synchronous with the logic
timing. If the SAVE command must be used, we strongly recommend that the 3.3 MHz clock derived from the
33 MHz PCI clock be selected as the clock source. The CTS9513-2 data sheet is available on our web site at
www.mccdaq.com/PDFmanuals/9513A.pdf.
Parameter
Counter type
Configuration
Compatibility
Each 9513 device is programmable for:
Clock source
Gate
Output
Osc Out
Clock input frequency
X2 clock input sources
Table 1. Counter specifications
Conditions
CTS9513
Two 9513 devices. Five up/down counters per 9513, 16-bits each.
5V/TTL
Software selectable:
External:
! Counter 1-5 clock inputs
! Counter 1-5 gate inputs
Internal:
! Terminal count of previous counter
! X2 clock frequency scaler
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 (CTRnGATE) individually pulled up through 10K resistors to
+5V.
Internal:
! Active high previous counter terminal count
! No gating.
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.
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.
6.8 MHz max (145 nS min period)
Software selectable:
! 1.0 MHz (10 MHz Xtal divided by 10)
! 5.0 MHz (10 MHz Xtal divided by 2)
! 3.3 MHz (33 MHz PCI clock divided by 10)
4-1
Chapter 4