Echelon I/O Model Reference for Smart Transceivers and Neuron Chips - Manual (Page 203)

I/O Model Reference 193
Timer/Counter Pulsetrain Output
The following sections list the possible choices for pulsetrain repetition
frequencies for pulsewidth short output and pulsecount output.
Series 3100 Pulsetrain Output
For pulsewidth long output, Table 70 lists the possible choices for pulsetrain
repetition frequencies. The table lists the values for a Series 3100 device with a
10 MHz input clock (the values scale for other clock rates).
Table 70. Series 3100 Timer/Counter Pulsetrain Output at 10 MHz
Clock Select Frequency Period
0 76.3 Hz 13.1 ms
1 38.1 Hz 26.2 ms
2 19.1 Hz 52.4 ms
3 9.54 Hz 105 ms
4 4.77 Hz 210 ms
5 2.38 Hz 419 ms
6 1.19 Hz 839 ms
7 0.60 Hz 1678 ms
To Calculate for Other Clock Rates:
• Period =
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
×
InputClock
t ClockSelec ) ( 2
131072
ClockSelect = 0..7
InputClock in MHz
Period in seconds
• Frequency = 1 / Period
Frequency in Hertz
Period in seconds
Series 5000 Pulsetrain Output
For pulsewidth long output, Table 71 on page 194 lists the possible choices for
pulsetrain repetition frequencies.
The resolution and range values in Table 71 apply to all system clock settings,
that is, they do not scale with changes to the system clock.