Echelon I/O Model Reference for Smart Transceivers and Neuron Chips - Manual (Page 201)

I/O Model Reference 191
Series 3100 Square Wave Output
For pulsewidth short output and pulsecount output, Table 68 lists the possible
choices for pulsetrain repetition frequencies for a Series 3100 device. Pulsecount
cannot be used with clock select 0. The table lists the values for a 10 MHz input
clock (the values scale for other clock rates).
Table 68. Series 3100 Timer/Counter Square Wave Output at 10 MHz
Clock Select
System Clock
Divider
Repetition Rate
Repetition
Period or Pulse
Period
Resolution of
Pulse
0 ÷ 1
(5 MHz)
19531 Hz 51.2 μs 0.2 μs
1 ÷ 2
(2.5 MHz)
9766 Hz 102.4 μs 0.4 μs
2 ÷ 4
(1.25 MHz)
4883 Hz 204.8 μs 0.8 μs
3 ÷ 8
(625 kHz)
2441 Hz 409.6 μs 1.6 μs
4 ÷ 16
(312.5 kHz)
1221 Hz 819.2 μs 3.2 μs
5 ÷ 32
(156.25 kHz)
610 Hz 1638.4 μs 6.4 μs
6 ÷ 64
(78.125 kHz)
305 Hz 3276.8 μs 12.8 μs
7 ÷ 128
(39.06 kHz) 153 Hz 6553.6 μs 25.6 μs
To Calculate for Other Clock Rates:
• Period =
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
×
InputClock
t ClockSelec ) ( 2
512
ClockSelect = 0..7
InputClock in MHz
Period in seconds
• Frequency = 1 / Period
Frequency in Hertz
Period in seconds