UPD784915B Datasheet, PDF (45/86 Pages) NEC – 16-BIT SINGLE-CHIP MICROCONTROLLERS

µPD784915B, 784916B
(4) Reel FG comparators
The reel FG comparator converts a reel FG signal that indicates the speed information of the reel motor into a
logic signal. Two comparators, one for take-up and the other for supply, are provided.
Figure 3-22. Block Diagram of Reel FG Comparators
VREF
AMPM0.0
Supply reel signal
REEL0IN
AMPC.6
1
Reel FG comparator
0
Reel FG0 signal
(to timer unit)
VREF
AMPM0.0
Take-up reel signal
REEL1IN
AMPC.6
AMPC.6
1
Reel FG comparator
0
Reel FG1 signal
(to timer unit)
(5) CSYNC comparator
The CSYNC comparator converts the COMPSYNC signal into a logic signal.
Figure 3-23. Block Diagram of COMPSYNC Comparator
VREF
COMPSYNC signal
AMPM0.0
CSYNCIN
AMPM1.7
AMPC.5
AMPC.5
1
CSYNC comparator
0
CSYNC signal
(to timer unit)
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