ATAM862 datasheet(66/110 Pages) ATMEL

66 / 110 page

4554E–4BMCU–05/06

ATAM862-3

23.4

Timer 3 Modulator for Carrier Frequency Burst Modulation

If the output stage operates as pulse-width modulator for the shift register, the output can be

stopped with stage 1 of Timer 2. For this task, the timer mode 3 must be used and the prescaler

must be supplied by the internal shift clock of the shift register.

The modulator can be started with the start of the shift register (SIR = 0) and stopped either by a

shift register stop (SIR = 1) or compare match event of stage 1 of Timer 2. For this task, the

Timer 2 must be used in mode 3 and the prescaler stage must be supplied by the internal shift

clock of the shift register.

Figure 23-13. Modulator 3

23.5

Timer 3 Demodulator for Biphase, Manchester and Pulse-width-modulated Signals

The demodulator stage of Timer 3 can be used to decode Biphase, Manchester and

pulse-width-coded signals.

Figure 23-14. Timer 3 Demodulator 3

Set

Res

T3O

T3TOP

OMSK

TOG3

SSI/

Control

MUX

T3M

Timer 3 Mode

T3O

6 MUX 1

7 MUX 2

9 MUX 3

other MUX 0

Demodulator 3

T3EX

Res

CM31

Counter 3

Reset

Counter 3

Control

SCI

T3I

T3M

ATAM862 Datasheet(PDF) 66 Page - ATMEL Corporation

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