Rainbow Electronics ATAR862-3 - Manual (Page 78)

78
ATAR862-3
4556B–4BMCU–02/03
Combination Mode 1:
Burst Modulation SSI mode 1: 8-bit NRZ and internal data SO output to the Timer 2
modulator stage
Timer 2 mode 1, 2, 3 or 4: 8-bit compare counter with 4-bit programmable prescaler
and DCG
Timer 2 output mode 3: Duty cycle burst generator
Figure 76. Carrier Frequency Burst Modulation with the SSI Internal Data Output
Combination Mode 2:
Biphase Modulation 1 SSI mode 1: 8-bit shift register internal data output (SO) to the Timer 2
modulator stage
Timer 2 mode 1, 2, 3 or 4: 8-bit compare counter with 4-bit programmable prescaler
Timer 2 output mode 4: The modulator 2 of Timer 2 modulates the SSI internal
data output to Biphase code
Figure 77. Biphase Modulation 1
1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1
DCGO
Counter 2
TOG2
SO
T2O
Counter = compare register (=2)
Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Bit 8 Bit 9 Bit 10 Bit 11 Bit 12 Bit 13
TOG2
SC
SO
T2O
0 0 0 0
0 0 1 1 0 1 0 1
1 1 1 1
8-bit SR-data
Bit 7 Bit 0
Data: 00110101