OKI Semiconductor
ML9207-xx
5
×
7 Dot Character
×
24-Digit Display Controller/Driver with Character RAM
FEDL9207-02
Issue Date: May 17, 2005
GENERAL DESCRIPTION
The ML9207-xx is a dot matrix vacuum fluorescent display tube controller driver IC which displays characters,
numerics and symbols.
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 ML9207-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
•
•
•
•
: 3.3 V
±10%
or 5.0 V
±10%
Logic power supply (V
DD
)
Fluorescent display tube drive power supply (V
DISP
) : 3.3 V
±10%
or 5.0 V
±10%
Fluorescent display tube drive power supply (V
FL
) : –20 to –60 V
VFD driver output current
(VFD driver output can be connected directly to the fluorescent display tube. No pull-down resistor is
required.)
• Segment driver (SEG1 to SEG35)
: –5.0 mA
(V
FL
= –60 V)
• Segment driver (AD1 to AD4)
: –10.0 mA
(V
FL
= –60 V)
• Grid driver (COM1 to COM24)
: –50.0 mA
(V
FL
= –60 V)
General output port output current
Output driver (P1 to P4)
:
±1.0
mA (V
DD
= 3.3 V±10%)
±2.0
mA (V
DD
= 5.0 V±10%)
Content of display
• CGROM
5
×
7 dots
: 240 types (character data)
• CGRAM
5
×
7 dots
: 16 types (character data)
• ADRAM
24 (display digit)
×
4 bits (symbol data)
• DCRAM
24 (display digit)
×
8 bits (register for character data display)
• General output port
4 bits (static operation)
Display control function
• Display digit
: 9 to 24 digits
• Display duty (brightness adjustment) : 0/1024 to 960/1024
• All lights ON/OFF
4 interfaces with microcontroller
: DA,
CS, CP, RESET
1-byte instruction execution (excluding data write to RAM and Display duty set)
Built-in oscillation circuit
• Crystal oscillation or ceramic oscillation
Package options:
80-pin QFP package (QFP80-P-1414-0.65-K) (Product name : ML9207-xxGP)
80-pin QFP package (QFP80-P-1420-0.80-BK) (Product name : ML9207-xxGA)
xx indicates the code number.
•
•
•
•
•
•
•
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FEDL9207-02
OKI Semiconductor
ML9207-xx
BLOCK DIAGRAM
V
DISP
V
DD
GND
V
FL
DCRAM
24w
×
8b
CGROM
240w
×
35b
SEG1
Segment
Driver
SEG35
AD1
AD
Driver
AD4
RESET
DA
CP
CS
8-bit
Shift
Register
CGRAM
16w
×
35b
ADRAM
24w
×
4b
Address
Selector
Command
Decoder
Control
Circuit
Write
Address
Counter
Read
Address
Counter
P1
Port
Driver
P4
Digit
Control
Duty
Control
Timing
Generator1
COM1
Grid
Driver
COM24
Timing
Generator2
OSC0
OSC1
Oscillator
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FEDL9207-02
OKI Semiconductor
ML9207-xx
SCHEMATIC DIAGRAM OF DRIVER OUTPUT CIRCUIT
V
DISP
V
DISP
OUTPUT
V
FL
V
FL
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FEDL9207-02
OKI Semiconductor
ML9207-xx
PIN CONFIGURATION (TOP VIEW)
AD2
AD1
V
DISP2
NC
V
FL2
P4
P3
P2
P1
V
DD
DA
CP
CS
RESET
OSC1
OSC0
GND
V
FL1
COM24
COM23
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
50
49
48
47
46
45
44
43
42
41
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
AD3
AD4
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
COM22
COM21
COM20
COM19
COM18
COM17
COM16
COM15
COM14
COM13
COM12
COM11
COM10
COM9
COM8
COM7
COM6
COM5
COM4
COM3
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
SEG35
V
DISP1
COM1
COM2
NC: No connection
80-Pin Plastic QFP
(QFP80-P-1414-0.65-K)
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FEDL9207-02
OKI Semiconductor
ML9207-xx
69
RESET
67
OSC0
68
OSC1
80
V
DISP2
66
GND
79
NC
78
V
FL2
AD1
AD2
AD3
AD4
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
65
V
FL1
73
V
DD
72
DA
71
CP
70
CS
77
P4
75
P2
74
P1
76
P3
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
31
32
33
34
35
36
37
38
64
COM24
63
COM23
62
COM22
61
COM21
60
COM20
59
COM19
58
COM18
57
COM17
56
COM16
55
COM15
54
COM14
53
COM13
52
COM12
51
COM11
50
COM10
49
COM9
48
COM8
47
COM7
46
COM6
45
COM5
44
COM4
43
COM3
42
COM2
41
COM1
NC: No connection
80-Pin Plastic QFP
(QFP80-P-1420-0.80-BK)
SEG35
39
V
DISP1
40
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
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电源技术