Rainbow-electronics ATAR862-8 User Manual download pdf (Page 49)

ATAR862-8

4589B–4BMCU–02/03

Timer 2 Output Mode 4 Biphase Modulator: Timer 2 Modulates the SSI Internal Data Output (SO) to Biphase

Code.

Figure 47. Biphase Modulation

Timer 2 Output Mode 5 Manchester Modulator: Timer 2 Modulates the SSI internal data output (SO) to

Manchester code

Figure 48. Manchester Modulation

Timer 2 Output Mode 7 In this mode the timer overflow defines the period and the compare register defines the

duty cycle. During one period only the first compare match occurrence is used to toggle

the timer output flip-flop, until the overflow all further compare match are ignored. This

avoids the situation that changing the compare register causes the occurrence of sev-

eral compare match during one period. The resolution at the pulse-width modulation

Timer 2 mode 1 is 12-bit and all other Timer 2 modes are 8-bit.

TOG2

T2O

0000

0011 0101

11 1 1

8-bit SR-Data

Bit 7 Bit 0

Data: 00110101

TOG2

T2O

000

0011 0101

11 1 1

8-bit SR-Data

Bit 7 Bit 0

Data: 00110101

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 105 106

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Rainbow-electronics ATAR862-8 User Manual Page 49