ATAM894 datasheet(55/97 Pages) ATMEL

55 / 97 page

4679D–4BMCU–05/05

ATAM894

6.3.3.5

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

The demodulator stage of Timer 3 can be used to decode Bi-phase, Manchester and

puls-width-coded signals

Figure 6-37.

Timer 3 Demodulator 3

6.3.3.6

Timer 3 Registers

6.3.3.7

Timer 3 Mode Register (T3M)

Demodulator 3

T3EX

Res

CM31

Counter 3

Reset

Counter 3

Control

SCI

T3I

T3M

Address: 'B'hex — Subaddress: '0'hex

Bit 3

Bit 2

Bit 1

Bit 0

T3M3

T3M2

T3M1

T3M0

Reset value: 1111b

T3M3

Timer 3 Mode select bit 3

T3M2

Timer 3 Mode select bit 2

T3M1

Timer 3 Mode select bit 1

T3M0

Timer 3 Mode select bit 0

Table 6-13.

Timer 3 Mode Select Bits

Mode

T3M3

T3M2

T3M1

T3M0

Timer 3 Modes

1111

Timer/counter with a read access

1110

Timer/counter, external capture and external trigger

restart mode (T3I)

1101

Timer/counter, internal capture and internal trigger

restart mode (TOG2)

1100

Timer/counter mode 1 without output (T2O -> T3O)

1011

Timer/counter mode 2 without output (T2O -> T3O)

1010

Burst modulation with Timer 2 (M2)

1001

Burst modulation with shift register (SO)

1000

FSK modulation with shift register (SO)

0111

Pulse-width modulation with shift register (SO) and

Timer 2 (TOG2), internal trigger restart (SCO) ->

counter reset

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