ml9289 Oki Semiconductor, ml9289 Datasheet - Page 21

• Manufacturer Part Number: ml9289
• Description: Vacuum Fluorescent Display Tube Controller Driver
• Manufacturer: Oki Semiconductor

5. “Number of display digits set” command
For the number of display digits, 1 to 16 digits can be specified using 4-bit data.
When power is turned on or when a RESET signal is input, the number-of-display-digits register value is “0”.
Always execute this command before turning the display on, then set a desired value.
[Command format]
[Relation between data to be set and the number of digits of COM to be controlled]
* The state when power is turned on or when the RESET signal is input.
1st byte
(Writes the number of display digits into the number-of-display-digits register.)
HEX
0
1
2
3
4
5
6
7
LSB
B0 B1 B2 B3 B4 B5 B6 B7
K0 K1 K2 K3 0
K0 (LSB) to K3 (MSB) : Data of the number of display digits (4 bits: 16 digits worth)
K0
0
1
0
1
0
1
0
1
K1
0
0
1
1
0
0
1
1
K2
0
0
0
0
1
1
1
1
1
K3
0
0
0
0
0
0
0
0
1
MSB
0
No. of digits
COM1–16
COM1–2
COM1–3
COM1–4
COM1–5
COM1–6
COM1–7
of COM
COM1
: Setup in display digits specification mode and digits value
is specified.
HEX
C
D
8
9
A
B
E
F
K0
0
1
0
1
0
1
0
1
K1
0
0
1
1
0
0
1
1
K2
0
0
0
0
1
1
1
1
K3
1
1
1
1
1
1
1
1
No. of digits
COM1–10
COM1–11
COM1–12
COM1–13
COM1–14
COM1–15
COM1–8
COM1–9
of COM
FEDL9289-01
ML9289-xx
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