Supported Device Driver Capabilities
115
Clocks
Table 22: DT300 Series Clock Options
DT300 Series A/D D/A DIN DOUT C/T QUAD
Internal Clock Support
SupportsInternalClock Ye s Ye s Ye s
External Clock Support
SupportsExternalClock Ye s Ye s
Simultaneous Input/Output on a Single
Clock Signal
SupportsSimultaneousClocking
Base Clock Frequency
BaseClockFrequency 20 MHz 0 0 0 20 MHz
Maximum Clock Divider
MaxExtClockDivider 1.0 1.0 1.0 1.0 65536
Minimum Clock Divider
MinExtClockDivider 1.0 1.0 1.0 1.0 2.0
Maximum Frequency
MaxFrequency 3 MHz
a
a. For DT301 and DT302 boards, the maximum throughput for analog input channels is 225 kHz;
for DT303 and DT304 boards, the maximum throughput for analog input channels is 400 kHz;
for DT321 and DT322 boards, the maximum throughput for analog input channels is 250 kHz.
For all boards, if the channel-gain list contains channel 16 only (the digital input channel), the
maximum throughput is 3 MHz.
1.0 Hz 0 0 10 MHz
b
b. If using cascaded counter/timers, this value is 5 MHz.
Minimum Frequency
MinFrequency 1.2 Hz 1.0 Hz 0 0 0.005 Hz
c
c. Any two adjacent counter/timers, such as (1,2) or (2,3) or (3,4), can be cascaded. If you are not
using cascaded counter/timers, this value is approximately 305.18 Hz.
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