ML9227 Datasheet, PDF (15/26 Pages) OKI electronic componets – 27-Bit Duplex/Triplex VFD Controller/Driver with Digital Dimming, ADC and Key scan

OKI Semiconductor
FEDL9227-01
ML9227
Digital Dimming Data Input [Function Mode: 4]
• ML9227 receives the digital dimming data when function mode 4 is selected.
• The output duty changes in the range of 0/1024 (0%) to 1016/1024 (99.2%) for each grid.
• The 10-bit digital dimming data is input from LSB.
[Data Format]
Input Data
Digital Dimming Data
Mode Data
: 13 bits
: 10 bits
: 3 bits
Bit
Input Data
12
D1 D2
LSB
345678
D3 D4 D5 D6 D7 D8
Digital Dimming Data (10 bits)
9 10
D9 D10
MSB
11 12 13
M0 M1 M2
Mode Data
(3 bits)
(LSB)
Dimming Data
(MSB)
D1 D2 D3 D4 D5 D6 D7 D8 D9 D10
000000000 0
100000000 0
Duty Cycle
0/1024
1/1024
111011111 1
000111111 1
100111111 1
1015/1024
1016/1024
1016/1024
111111111 1
1016/1024
Key scan Stop [Function Mode: 5]
• ML9227 stops a key scanning when function mode 5 are selected.
• To select this mode, the only mode data (M0 to M2) is needed.
• The actual time lag range between receipt of the keyscan stop command and the ceasing of scanning is 2.4 µs to
3.6 µs
[Input Data Format]
Input Data
Mode Data
: 3 bits
: 3 bits
Bit
Input Data
28 29 30
M0 M1 M2
Mode Data
(3 bits)
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