Semiconductor
ML9211
1/19
GENERAL DESCRIPTION
The ML9211 is a full CMOS controller/driver for Duplex or Triplex (1/2 duty or 1/3 duty)
vacuum fluorescent display tube. It consists of a 56-segment driver multiplexed to drive up to
168 segments, and 10-bit digital dimming circuit.
ML9211 features a selection of a master mode and a slave mode, and therefore it can be used to
expand segments for the VFD driver with keyscan and A/D converter function.
ML9211 provides an interface with a microcontroller only by three signal lines: DATA IN,
CLOCK and CS.
FEATURES
Logic supply voltage (V
DD
)
: 4.5 to 5.5V
Driver supply voltage (V
DISP
)
: 8 to 18V
Duplex/Triplex (1/2 duty / 1/3 duty) selectable
DUP/TRI=1/2 duty selectable at "H" level
DUP/TRI=1/3 duty selectable at "L" level
Number of display segments
Max. 112-segment display (during 1/2 duty mode)
Max. 168-segment display (during 1/3 duty mode)
Master/Slave selectable
M/S=Master mode selectable at "H" level
M/S=Slave mode selectable at "L" level
Interface with a microcontroller
Three lines: CS, CLOCK, and DATA IN
56-segment driver outputs
: I
OH
=5mA at V
OH
=V
DISP
0.8V (SEG1 to 37)
(can be directly connected to VFD tube
: I
OH
=10mA at V
OH
=V
DISP
0.8V (SEG38 to 56)
and require no external resistors)
: I
OL
=500mA at V
OL
=2V (SEG1 to 56)
3-grid pre-driver outputs
: I
OH
=5.0mA at V
OH
=V
DISP
0.8V
(require external drivers)
I
OL
=10mA at V
OL
=2V
Logic outputs
: I
OH
=200mA at V
OH
=V
DD
0.8V
I
OL
=200mA at V
OL
=0.8V
Built-in digital dimming circuit (10-bit resolution)
Built-in oscillation circuit (external R and C)
Built-in Power-On-Reset circuit
Package options:
80-pin plastic QFP (QFP80-P-1420-0.80-BK)
Product name: ML9211GA
80-pin plastic QFP (QFP80-P-1414-0.65-K)
Product name: ML9211GP
Preliminary
Semiconductor
ML9211
56-Bit Duplex/Triplex (1/2 duty / 1/3 duty) VF Controller/Driver with Digital Dimming
E2C0045-19-83
This version: Aug. 1999
Semiconductor
ML9211
5/19
NC: No connection
80-pin Plastic QFP
(QFP80-P-1414-0.65-K)
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
SEG39
SEG38
V
DISP
SEG37
SEG36
SEG35
SEG34
SEG33
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
V
DISP
SEG23
SEG22
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
NC
D-GND
V
DD
DIM IN
SYNC IN 1
SYNC IN 2
CS
CLOCK
DATA IN
NC
L-GND
OSC0
DUP/
TRI
M/
S
SYNC OUT 2
SYNC OUT 1
DIM OUT
D-GND
NC
SEG1
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SEG40
SEG41
SEG42
SEG43
SEG44
SEG45
SEG46
SEG47
SEG48
SEG49
SEG50
SEG51
SEG52
SEG53
SEG54
SEG55
SEG56
GRID1
GRID2
GRID3
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