Timer 3 – mode 11: biphase demodulation, Figure 59, Figure 60 – Rainbow Electronics T48C862-R4 User Manual
Page 60
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60
T48C862-R4
4551B–4BMCU–02/03
Figure 59.
Manchester Demodulation
Timer 3 – Mode 11:
Biphase Demodulation
In the Biphase demodulation mode, the timer operates like in Manchester demodulation
mode. The difference is that the bits are decoded via a toggle flip-flop. This flip-flop sam-
ples the edge in the middle of the bitframe and the compare register 1 match event
shifts the toggle flip-flop output into shift register (see also combined mode 9).
Figure 60.
Biphase Demodulation
1
0
1
1
1
0
0
1
1
0
1
1
BIT 0
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
Synchronize
Manchester demodulation mode
Timer 3
mode
T3EX
SI
SR-DATA
T3I
CM31=SCI
1
0
0
1
1
0
0
1
1
1
1
0
1
BIT 0
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
Synchronize
Biphase demodulation mode
Timer 3
mode
T3EX
Q1=SI
CM31=SCI
SR-DATA
0
0
0
0
T3I
Reset
Counter 3
1
0
1
0
1
0
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