msm9223 Oki Semiconductor, msm9223 Datasheet - Page 19

• Manufacturer Part Number: msm9223
• Description: 27-bit Duplex/triplex Vfd Controller/driver With Digital Dimming, Adc And Keyscan
• Manufacturer: Oki Semiconductor

chattering absorption time
A
B
Q3, Q2, Q1
¡ Semiconductor
1-2) counter clockwise
When signal A and B input as fig. 3, the phase detection circuit outputs Down signal after the
chattering absorption period. At this time, the output INT also goes to High level. The INT stays
High level until the switch data-output mode is selected.
3) Direction latch
When the Direction latch is input DOWN the output R goes "1". But if the UP pulse is input and
the counts value change to plus value, the output R goes to "0".
2) UP/DOWN COUNTER
When the UP/DOWN COUNTER is input UP, it counts up and when it is input DOWN, it counts
down.
But if overcounte of "111" occurs the UP/DOWN COUNTER stays "111".
A
B
DOWN (internal)
INT
A
B
R1
Q1, Q2, Q3
Fig.3 The Input and Output Timing in Case of Counter Clockwise.
001
100
010
010
011
Fig.5
Fig.4
100
101
100
110
000
111
100
MSM9223
111
010
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