FEDL9203-01
1Semiconductor
This version: Sep. 2001
ML9203-xx
5
7 Dot Character
16-Digit
2-Line Display Controller/Driver with Character RAM
1/32
GENERAL DESCRIPTION
The ML9203-xx is a 5
7 dot matrix type vacuum fluorescent display tube controller driver IC which displays
characters, numerics and symbols of a maximum of 16 digits
2 lines.
Dot matrix vacuum fluorescent display tube drive signals are generated by serial data sent from a micro-controller.
A display system is easily realized by internal ROM and RAM for character display.
The ML9203-xx has low power consumption since it is made by CMOS process technology.
01 is available as a general-purpose code.
Custom codes are provided on customer's request.
FEATURES
Logic power supply (V
DD
)
: 3.3 V10% or 5.0 V10%
VFD tube drive power supply (V
DISP
) : 20 to 60 V
VFD driver output current
(VFD driver output can be connected directly to the VFD tube. No pull-down resistor is required.)
Segment driver (SEGA1 to A35, SEGB1 to B35)
Only one driver output is high
: 5 mA (V
DISP
= 60 V)
All the driver outputs are high
: 350 mA (V
DISP
= 60 V)
Segment driver (ADA, ADB)
: 20 mA (V
DISP
= 60 V)
Grid driver (COM1 to 16)
: 50 mA (V
DISP
= 60 V)
Content of display
SEGA1 to SEGA35 and ADA
CGROM_A 5
7 dots
: 240 types (character data)
CGRAM_A 5
7 dots
: 16 types (character data)
ADRAM_A 16 (display digit)
1 bit (symbol data; can be used for a cursor.)
DCRAM_A 16 (display digit)
8 bits (register for character data display)
SEGB1 to SEGB35 and ADB
CGROM_B 5
7 dots
: 240 types (character data)
CGRAM_B 5
7 dots
: 16 types (character data)
ADRAM_B 16 (display digit)
1 bit (symbol data; can be used for a cursor.)
DCRAM_B 16 (display digit)
8 bits (register for character data display)
Display control function
Display digit
: 1 to 16 digits
Display duty (brightness adjustment): 0/1024 to 960/1024 stages
All lights ON/OFF
4 interfaces with microcontroller
: DA,
CS, CP, and RESET
Built-in oscillation circuit
Crystal oscillation or ceramic oscillation: 4.0 MHz (Typ)
Standby function
Inhibiting the oscillator circuit provides low power consumption.
Package options:
100-pin plastic QFP (QFP100-P-1420-0.65-BK) (Product name: ML9203-xxGA)
FEDL9203-01
1Semiconductor
ML9203-xx
3/32
PIN CONFIGURATION (TOP VIEW)
100-Pin Plastic QFP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
SEGA15
SEGA14
SEGA13
SEGA12
SEGA11
SEGA10
SEGA9
SEGA8
SEGA7
SEGA6
SEGA5
SEGA4
SEGA3
SEGA2
SEGA1
SEGB1
SEGB2
SEGB3
SEGB4
SEGB5
SEGB6
SEGB7
SEGB8
SEGB9
SEGB10
SEGB11
SEGB12
SEGB13
SEGB14
SEGB15
SEG
B1
6
SEG
B1
7
SEG
B1
8
SEG
B1
9
SEG
B2
0
SEG
B2
1
SEG
B2
2
SEG
B2
3
SEG
B2
4
SEG
B2
5
SEG
B2
6
SEG
B2
7
SEG
B2
8
SEG
B2
9
SEG
B3
0
SEG
B3
1
SEG
B3
2
SEG
B3
3
SEG
B3
4
SEG
B3
5
V
DISP
ADA
COM9
COM10
COM11
COM12
COM13
COM14
COM15
COM16
D-GND
V
DD
DA
CP
CS
RESET
OSC1
OSC0
L-GND
D-GND
COM8
COM7
COM6
COM5
COM4
COM3
COM2
COM1
ADB
V
DISP
SEG
A1
6
SEG
A1
7
SEG
A1
8
SEG
A1
9
SEG
A2
0
SEG
A2
1
SEG
A2
2
SEG
A2
3
SEG
A2
4
SEG
A2
5
SEG
A2
6
SEG
A2
7
SEG
A2
8
SEG
A2
9
SEG
A3
0
SEG
A3
1
SEG
A3
2
SEG
A3
3
SEG
A3
4
SEG
A3
5
FEDL9203-01
1Semiconductor
ML9203-xx
4/32
PIN DESCRIPTION
Pin
Symbol
Type
Connects to
Description
1 to 15,
81 to 100
SEGA1 to A35
16 to 50
SEGB1 to B35
O
VFD tube
anode
electrode
VFD tube anode electrode drive output.
Directly connected to fluorescent display tube and a pull-
down resistor is not necessary. I
OH
> 5 mA
53 to 60,
71 to 78
COM1 to 16
O
VFD tube
grid
electrode
VFD tube grid electrode drive output.
Directly connected to fluorescent display tube and a pull-
down resistor is not necessary. I
OH
> 50 mA
52, 79
ADA, ADB
O
VFD tube
anode
electrode
VFD tube anode electrode drive output.
Directly connected to fluorescent display tube and a pull-
down resistor is not necessary. I
OH
> 20 mA
69
V
DD
62
L-GND
51, 80
V
DISP
61, 70
D-GND
--
Power
supply
V
DD
-L-GND are power supplies for internal logic.
V
DISP
-D-GND are power supplies for driving fluorescent
tubes. Apply V
DISP
after V
DD
is applied.
Use the same power supply for L-GND and D-GND.
68
DA
l
Micro-
controller
Serial data input (positive logic).
Input from LSB.
67
CP
l
Micro-
controller
Shift clock input.
Serial data is shifted on the rising edge of
CP
.
66
CS
l
Micro-
controller
Chip select input.
Serial data transfer is disabled when
CS
pin is "H" level.
65
RESET
l
Micro-
controller
Reset input.
"Low" initializes all the functions.
Initial status is as follows.
Address of each RAM .............. address "00"H
Data of each RAM .................... Content is undefined
Display digit.............................. 16 digits
Brightness adjustment.............. 0/1024
All lights ON or OFF ................. OFF mode
63
OSC0
l
64
OSC1
O
Crystal or
ceramic
resonator
Pins for self-oscillation.
(Do not apply external clocks to these pins.)
Connect these pins to the crystal and capacitors or to the
ceramic resonator and capacitors.
The target oscillation frequency is 4.0 MHz.
(Note that the device includes the feed back resistor of
1 M
.)
See Application Circuit.
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