ml9270 Oki Semiconductor, ml9270 Datasheet - Page 9

• Manufacturer Part Number: ml9270
• Description: 33-segment Vfd Driver
• Manufacturer: Oki Semiconductor

Shift Register Numbers (Bit Numbers) and Corresponding OUTPUT Pin Names (OUTPUT Numbers)(Code 01)
Self Loading
The self loading is a function that 33-bit display data that is sent to the shift register is loaded into the display data
latch automatically.
The DATA OUT pin is connected directly to the LOAD ENABLE pin, as shown in the diagram below, and
register number 0 (the final bit) is set to “1” by data sent from the MCU. This enables the contents of the shift
register to be automatically loaded into the display data latch on the 34th CLOCK pulse and the shift register to be
initialized (set to “0”).
OKI Semiconductor
Register No.
OUTPUT No.
Register No.
OUTPUT No.
Register No.
OUTPUT No.
From main MCU
33
33
22
22
11
11
32
32
21
21
10
10
31
31
20
20
9
9
DATA
CLOCK
BLANK_BAR
LOAD ENABLE
DATA OUT
30
30
19
19
8
8
29
29
18
18
7
7
GND
V
V
DD
DD
28
28
17
17
6
6
OUTPUT33
OUTPUT1
V
V
DISP
DISP
|
27
27
16
16
5
5
26
26
15
15
4
4
25
25
14
14
3
3
24
24
13
13
2
2
To vacuum fluorescent
display tube
23
23
12
12
1
1
PEDL9270A-01
ML9270A-xx
DATA OUT
0
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