Timer 3 – mode 4: timer/counter, Timer 3 modulator/demodulator modes – Rainbow Electronics T48C862-R4 User Manual
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T48C862-R4
4551B–4BMCU–02/03
Figure 55.
Externally Triggered Counter Reset and Start Combined with Single-action
Mode
Timer 3 – Mode 3:
Timer/Counter, Internal
Trigger Restart and Internal
Capture (with TOG2)
The counter is driven by an internal or external (T3I) clock source. The output toggle sig-
nal of Timer 2 resets the counter. The counter value before the reset is saved in the
capture register. If single-action mode is activated for one or both compare registers, the
trigger signal restarts the single actions. This mode can be used for frequency measure-
ments or as event counter with time gate (see combination mode 10).
Figure 56.
Event Counter with Time Gate
Timer 3 – Mode 4:
Timer/Counter
The timer runs as timer/counter in mode 1, but its output T3O is used as output for the
Timer 2 output signal.
Timer 3 – Mode 5:
Timer/Counter, External
Trigger Restart and External
Capture (with T3I Input)
The Timer 3 runs as timer/counter in mode 2, but its output T3O is used as output for the
Timer 2 output signal.
Timer 3 Modulator/Demodulator Modes
Timer 3 – Mode 6:
Carrier Frequency Burst
Modulation Controlled by
Timer 2 Output Toggle
Flip-Flop (M2)
The Timer 3 counter is driven by an internal or external clock source. Its compare- and
compare mode registers must be programmed to generate the carrier frequency via the
output toggle flip-flop. The output toggle flip-flop of Timer 2 is used to enable or disable
the Timer 3 output. Timer 2 can be driven by the toggle output signal of Timer 3 or any
other clock source (see combination mode 11).
Timer 3 – Mode 7:
Carrier Frequency Burst
Modulation Controlled by SSI
Internal Output (SO)
The Timer 3 counter is driven by an internal or external clock source. Its compare- and
compare mode registers must be programmed to generate the carrier frequency via the
output toggle flip-flop. The output (SO) of the SSI is used to enable or disable the Timer
3 output. The SSI should be supplied with the toggle signal of Timer 2 (see combination
mode 12).
0 0 0 0 0 0 0 0 1 2 3 4 5 6
Counter 3
T3EX
CM31
CM32
7 8 9 10 0 1 2 X X X 0 1 2 3 4 5 6 7 8 9 10 0 1 2 X X
T3R
X X
T3O
0 0 1 2 3 4 5 6 7 8 9 10
Counter 3
TOG2
T3CP-
Register
11
0 1
2
4
0 1
T3I
2
3
T3R
Capture value = 0
Capture value = 11
Capture
value = 4