Echelon I/O Model Reference for Smart Transceivers and Neuron Chips - Manual (Page 182)

172 Timer/Counter Output Models
• If the output is disabled, the new (non-zero) output starts immediately
after t
fout
• For a new output value of zero, the output is disabled immediately and
not at the end of the current cycle
A disabled output is a logic 0 by default, unless the invert keyword is used in the
I/O object declaration.
ONE CYCLE
NEW OUTPUT
APPEARS ON PIN
HARDWARE
UPDATED
INTERNALLY
START
OF
io_out()
ONE CYCLE
TIME
PULSEWIDTH
OUTPUT
t
fout
t
ret
Timer/Counter 1
Timer/Counter 2
IO10
IO9
IO8
IO0
IO1
IO2
IO3
IO4
IO5
IO6
IO7
High Current Sink Drivers for 3100 Family Devices
IO11
System Clock
Divide Chain
Figure 64. Pulsewidth Output and Timing
Table 64. Pulsewidth Output Latency Values for Series 3100 Devices
Symbol Description Typical at 10 MHz
t
fout
Function call to output update 101 μs
t
ret
Return from function 13 μs