T48C862-R4 datasheet(58/107 Pages) ATMEL

58 / 107 page

T48C862-R4 [Preliminary]

4551C–4BMCU–01/04

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: Frequency

Measurement or Event Counter with Time Gate” on page 85).

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: Burst Modulation 1” on page 86).

000000 00123456

Counter 3

T3EX

CM31

CM32

7 8 9 10 0 12 X X X 0 1 23 4 5 67 89 10 01 2 X X

T3R

T3O

001 2 34567 8 9 10

Counter 3

TOG2

T3CP-

0 1

40 1

T3I

T3R

Capture value = 0

Capture value = 11

Capture

value = 4

T48C862-R4 数据表(PDF) 58 Page - ATMEL Corporation

T48C862-R4 数据表(HTML) 58 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载