Rainbow-electronics ATAR862-8 User Manual download pdf (Page 80)

ATAR862-8

4589B–4BMCU–02/03

Combination Mode 5:

Biphase Modulation 2

SSI mode 1: 8-bit shift register internal data output (SO) to the Timer 2

modulator stage

Timer 2 mode 3: 8-bit compare counter and 4-bit prescaler

Timer 2 output mode 4: The modulator 2 of Timer 2 modulates the SSI data output

to Biphase code

The 4-bit stage can be used as prescaler for the SSI to generate the stop signal for mod-

ulator 2. The SSI has a special mode to supply the prescaler via the shift clock. The

control output signal (OMSK) of the SSI is used as stop signal for the modulator. Figure

72 shows an example for a 13-bit Biphase telegram.

Figure 80. Biphase Modulation

00000000123450

Counter 2/1 = Compare Register 2/1 (= 5)

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

SCLI

Buffer full

SIR

MSM

Timer 2

Mode 3

SCL

Counter

2/1

OMSK

T2O

012

1 2 ... 75 76 77 78 79 80 81 82 83 84 85 ... 105 106

No comments

Rainbow-electronics ATAR862-8 User Manual Page 80