OKI ML9211

E2C0045-19-83
el
Pr
This version: Aug.
1999
ML9211
in
y
ar
¡ Semiconductor
ML9211
im
¡ Semiconductor
56-Bit Duplex/Triplex (1/2 duty / 1/3 duty) VF Controller/Driver with Digital Dimming
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 (VDD)
: 4.5 to 5.5V
: 8 to 18V
• Driver supply voltage (VDISP)
• 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
: IOH=–5mA at VOH=VDISP–0.8V (SEG1 to 37)
(can be directly connected to VFD tube
: IOH=–10mA at VOH=VDISP–0.8V (SEG38 to 56)
and require no external resistors)
: IOL=500mA at VOL=2V (SEG1 to 56)
• 3-grid pre-driver outputs
: IOH=–5.0mA at VOH=VDISP–0.8V
(require external drivers)
IOL=10mA at VOL=2V
• Logic outputs
: IOH=–200mA at VOH=VDD–0.8V
IOL=200mA at VOL=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
1/19
¡ Semiconductor
ML9211
BLOCK DIAGRAM
SEG1
VDISP
56 Segment Driver
D-GND
Power
On
Reset
VDD
L-GND
0H
in1-56
4H
1H
POR
in1-3
CS
Control
0H
POR
Out1-56
Segment Latch
1
in1-56
Out1-56
168 to 56 Segment Control
in1-56
in1-56
Out1-56
Segment Latch
2
in1-56
Out1-56
Segment Latch
3
in1-56
2H
0H
POR
Out1-3
3bit Shift Register
Out1-56
56bit Shift Register
POR
POR
DATA IN
OSC0
3 Grid pre Driver
POR
Mode Select
CLOCK
GRID1 GRID2 GRID3
SEG56
4H
POR
3H
0H
POR
in1-10
Dimming Latch
Out1-10
10bit Digital
Dimming
OSC
POR
DIM IN
DIM OUT
SYNC IN1
SYNC IN2
SYNC OUT1
Timing Generator
SYNC OUT2
M/S
DUP/TRI
2/19
¡ Semiconductor
ML9211
INPUT AND OUTPUT CONFIGURATION
Schematic Diagram of Driver Output Circuit
VDISP
VDISP
OUTPUT
D-GND
D-GND
3/19
¡ Semiconductor
ML9211
65 VDISP
66 SEG24
67 SEG25
68 SEG26
69 SEG27
70 SEG28
71 SEG29
72 SEG30
73 SEG31
74 SEG32
75 SEG33
76 SEG34
77 SEG35
78 SEG36
2
64 SEG23
63 SEG22
3
62 SEG21
4
61 SEG20
5
60 SEG19
6
59 SEG18
7
58 SEG17
8
57 SEG16
1
9
56 SEG15
10
55 SEG14
11
12
54 SEG13
53 SEG12
13
52 SEG11
14
51 SEG10
15
16
50 SEG9
49 SEG8
17
48 SEG7
18
47 SEG6
19
46 SEG5
20
21
45 SEG4
44 SEG3
22
43 SEG2
23
42 SEG1
41 NC
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
VDD 25
24
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
SEG38
SEG39
SEG40
SEG41
SEG42
SEG43
SEG44
SEG45
SEG46
SEG47
SEG48
SEG49
SEG50
SEG51
SEG52
SEG53
SEG54
SEG55
SEG56
GRID1
GRID2
GRID3
NC
D-GND
79 SEG37
80 VDISP
PIN CONFIGURATION (TOP VIEW)
NC: No connection
80-pin Plastic QFP
(QFP80-P-1420-0.80-BK)
4/19
¡ Semiconductor
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
SEG39
SEG38
VDISP
SEG37
SEG36
SEG35
SEG34
SEG33
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
VDISP
SEG23
SEG22
ML9211
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
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
NC
D-GND
VDD
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
SEG40
SEG41
SEG42
SEG43
SEG44
SEG45
SEG46
SEG47
SEG48
SEG49
SEG50
SEG51
SEG52
SEG53
SEG54
SEG55
SEG56
GRID1
GRID2
GRID3
NC: No connection
80-pin Plastic QFP
(QFP80-P-1414-0.65-K)
5/19
¡ Semiconductor
ML9211
PIN DESCRIPTIONS
Symbol
Pin
QFP-1* QFP-2*
Type
Description
Power supply pins for VFD driver circuit.
VDISP
65, 80
63 78
—
VDD
25
23
—
Power supply pin for logic drive.
D-GND
24, 40
22, 38
—
D-GND is ground pin for the VFD driver circuit. L-GND is ground pin for the
L-GND
33
31
—
logic circuit. These should be connected externally.
SEG1 to 37
42 to 64, 40 to 62,
66 to 79 64 to 77
SEG38 to 56 1 to 19
79, 80,
1 to 17
These should be connected externally.
Segment (anode) signal output pins for a VFD tube. These pins can be directly
O
connected to the VFD tube. External circuit is not required.
IOH£–5 mA
Segment (anode) signal output pins for a VFD tube.These pins can be directly
O
connected to the VFD tube. External circuit is not required.
IOH£–10 mA
GRID1
20
18
GRID2
21
19
GRID3
22
20
CS
29
27
I
CLOCK
30
28
I
DATA IN
31
29
I
Inverted Grid signal output pins. For pre-driver, the external circuit is required.
O
IOL£10 mA
Chip select input pin.
Data is not transferred when CS is set to a Low level.
Shift clock input pin.
Serial data shifts at the rising edge of the CLOCK.
Serial data input pin (positive logic).
Data is input to the shift register at the rising edge of the CLOCK signal.
DUP/TRI
35
33
I
Duplex/Triplex operation select input pin.
Duplex (1/2 duty) operation is selected when this pin is set to VDD.
Triplex (1/3 duty) operation is selected when this pin is set to L-GND.
M/S
36
34
I
Master/Slave mode select input pin.
Master mode is selected when this pin is set to VDD.
Slave mode is selected when this pin is set to L-GND.
I
Dimming pulse input.
When the slave mode is selected, connect this pin to the master side DIM
OUT pin at the slave mode. The pulse width of the all segment output are
controlled by a input pulse width of DIM IN.
When the master mode is selected, the input level of this pin is ignored.
Connect this pin to VDD or L-GND at the master mode. The pulse width of the
all grids and segment outputs are controlled by a built-in 10-bit dimming circuit.
I
Synchronous signal input.
When the slave mode is selected, connect these pins to the master side SYNC
OUT 1 and 2 pins.
When the master mode is selected, the input level of these pins are ignored.
Connect these pins to VDD or L-GND at the master mode.
DIM IN
26
24
SYNC IN 1
27
25
SYNC IN 2
28
26
DIM OUT
39
37
O
Dimming pulse output.
Connect this pin to the slave side DIM IN pin.
6/19
¡ Semiconductor
Symbol
Pin
QFP-1* QFP-2*
SYNC OUT 1
38
36
SYNC OUT 2
37
35
OSC0
*
34
32
ML9211
Type
Description
Synchronous signal output.
O
Connect these pins to the slave side SYNC IN 1 and 2 pins.
I/O
RC oscillator connecting pins.
Oscillation frequency depends on display tubes
to be used. For details, refer to ELECTRICAL
CHARACTERISTICS.
VDD
OSC0
R
C
QFP-1: QFP80-P-1420-0.80-BK
QFP-2: QFP80-P-1414-0.65-K
ABSOLUTE MAXIMUM RATING
Symbol
Condition
Ratings
Unit
Driver Supply Voltage
Parameter
VDISP
—
–0.3 to +20
V
Logic Supply Voltage
VDD
—
–0.3 to +6.5
V
Input Voltage
VIN
—
–0.3 to VDD+0.3
V
Power Dissipation
PD
Storage Temperature
Output Current
Ta≥25°C
QFP80-P-1420-0.80-BK
760
QFP80-P-1414-0.65-K
630
TSTG
mW
—
–55 to +150
°C
IO1
SEG1 to 37
–10.0 to +2.0
mA
IO2
SEG38 to 56
–20.0 to +2.0
mA
IO3
GRID1 to 3
–10.0 to +20.0
mA
IO4
DIM OUT, SYNC OUT1, SYNC OUT2
–2.0 to +2.0
mA
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
Driver Supply Voltage
VDISP
—
8.0
13.0
18.0
V
Logic Supply Voltage
VDD
—
4.5
5.0
5.5
V
High Level Input Voltage
VIH
All inputs except OSC0
0.8VDD
—
—
V
Low Level Input Voltage
VIL
All inputs except OSC0
—
—
0.2VDD
V
Clock Frequency
fC
—
—
—
2.0
MHz
Oscillation Frequency
fOSC
R=10KW±5%, C=27pF±5%
2.6
3.3
4.0
MHz
Frame Frequency
fFR
R=10KW±5%,
1/3 Duty
211
269
325
Hz
C=27pF±5%
1/2 Duty
317
403
488
Hz
Operating Temperature
TOP
–40
—
+85
°C
—
7/19
¡ Semiconductor
ML9211
ELECTRICAL CHARACTERISTICS
DC Characteristics
Ta=–40 to +85°C,VDISP =8.0 to 18.0V, VDD=4.5 to 5.5V
Parameter
Symbol Applied pin
Condition
Min.
Max.
Unit
—
0.8VDD
—
V
—
—
0.2VDD
V
VIH=VDD
–1.0
+1.0
mA
High Level Input Voltage
VIH
*1)
Low Level Input Voltage
VIL
*1)
High Level Input Current
IIH
*1)
VIL=GND
Low Level Input Current
High Level Output Voltage
Low Level Output Voltage
Supply Current
IIL
*1)
VOH1
SEG1-37
VOH2
SEG38-56
VOH3
GRID1-3
IOH1=–5mA
VDISP=9.5V IOH2=–10mA
IOH3=–5mA
–1.0
+1.0
mA
VDISP–0.8
—
V
VDISP–0.8
—
V
VDISP–0.8
—
V
VOH4
*2)
IOH4=–200mA
VDD–0.8
—
V
VOL1
SEG1-37
IOL1=500mA
—
2.0
V
VOL2
SEG38-56
VDISP=9.5V IOL2=500mA
—
2.0
V
IOL3=10mA
—
2.0
V
IOL4=200mA
—
0.8
V
VDD=4.5V
VOL3
GRID1-3
VOL4
*2)
IDISP
VDISP
R=10KW±5%, C=27pF±5%,
—
100
mA
IDD
VDD
no load
—
5.0
mA
VDD=4.5V
*1) CS, CLOCK, DATA IN, DIM IN, SYNC IN 1, SYNC IN 2, M/S, DUP/TRI
*2) DIM OUT, SYNC OUT 1, SYNC OUT 2
8/19
¡ Semiconductor
ML9211
AC Characteristics
Ta=–40 to +85°C,VDISP =8.0 to 18.0V, VDD=4.5 to 5.5V
Parameter
Symbol
Condition
Clock Frequency
Min.
Max.
Unit
fC
—
—
2.0
MHz
tCW
—
200
—
ns
Data Setup Time
tDS
—
200
—
ns
Data Hold Time
tDH
—
200
—
ns
CS Off Time
tCSL
—
20
—
ms
tCSS
—
200
—
ns
tCSH
—
200
—
ns
tRSOFF
—
400
—
ms
—
2.0
ms
Clock Pulse Width
CS Setup Time
(CS-Clock)
CS Hold Time
(Clock-CS)
CS Wait Time
tR
Output Slew Rate Time
tR=20% to 80%
CL=100pF
—
2.0
ms
VDD Rise Time
tPRZ
Mounted in a unit
—
100
ms
VDD Off Time
tPOF
Mounted in a unit, VDD=0.0V
5.0
—
ms
tF
tF=80% to 20%
TIMING DIAGRAM
l Data Input Timing
tCSL
tCSS
CS
1/fC
tCW
CLOCK
tDS
DATA IN
tCSH
tCW
–0.2VDD
–0.8VDD
–0.2VDD
tDH
VALID
–0.8VDD
VALID
VALID
–0.8VDD
VALID
–0.2VDD
l Reset Timing
VDD
tPRZ
–0.8VDD
tPOF
–0.0V
tRSOFF
–0.8VDD
CS
–0.0V
l Driver Output Timing
SEG1-56, GRID1-3
tR
tF
tR
–0.8VDISP
–0.2VDISP
9/19
¡ Semiconductor
ML9211
l Output Timing (Duplex Operation) *1bit time=4/fOSC
(The dimming data is 1016/1024 in the master mode)
2048bit times (1 display cycle)
GRID1
1016bit times
VDISP
1016bit times
8bit times
8bit times
8bit times
D-GND
VDISP
1016bit times
GRID2
D-GND
VDISP
GRID3
3bit times
SEG1-56
1019bit times
5bit times
1019bit times
5bit times
DIM OUT
1019bit times
1019bit times
SYNC OUT2
1029bit times
5bit times
VDISP
D-GND
5bit times
VDD
1019bit times
5bit times
1029bit times
5bit times
D-GND
5bit times
1019bit times
1019bit times
5bit times
SYNC OUT1
5bit times
L-GND
5bit times
VDD
1019bit times
5bit times
1019bit times
L-GND
5bit times
VDD
1029bit times
L-GND
l Output Timing (Triplex Operation) *1bit time=4/fOSC
(The dimming data is 1016/1024 in the master mode)
3072bit times (1 display cycle)
GRID1
VDISP
1016bit times
8bit times
8bit times
D-GND
VDISP
1016bit times
GRID2
D-GND
8bit times
3bit times
SEG1-56
1019bit times
5bit times
1019bit times
5bit times
DIM OUT
1019bit times
1019bit times
5bit times
SYNC OUT1
1019bit times
1029bit times
5bit times
SYNC OUT2
VDISP
1016bit times
GRID3
1029bit times
1019bit times
5bit times
5bit times
VDISP
1019bit times
5bit times
5bit times
5bit times
1019bit times
L-GND
VDD
1019bit times
5bit times
D-GND
VDD
1019bit times
5bit times
D-GND
5bit times
L-GND
VDD
L-GND
10/19
¡ Semiconductor
ML9211
l Output Timing (Duplex Operation) *1bit time=4/fOSC
(The dimming data is 64/1024 in the master mode)
2048bit times (1 display cycle)
GRID1
64bit times
VDISP
64bit times
960bit times
960bit times
960bit times
D-GND
VDISP
64bit times
GRID2
D-GND
VDISP
GRID3
3bit times 957bit times
SEG1-56
67bit times
957bit times
DIM OUT
957bit times
957bit times
SYNC OUT1
957bit times
957bit times
SYNC OUT2
1981bit times
957bit times
957bit times
67bit times
D-GND
VDD
L-GND
VDD
67bit times
1981bit times
67bit times
957bit times
67bit times
67bit times
67bit times
D-GND
VDISP
67bit times
67bit times
957bit times
957bit times
957bit times
L-GND
VDD
1981bit times
L-GND
l Output Timing (Triplex Operation) *1bit time=4/fOSC
(The dimming data is 64/1024 in the master mode)
3072bit times (1 display cycle)
GRID1
VDISP
64bit times
960bit times
960bit times
D-GND
VDISP
64bit times
GRID2
D-GND
960bit times
3bit times 957bit times
SEG1-56
67bit times
957bit times
957bit times
957bit times
SYNC OUT1
957bit times
SYNC OUT2
1981bit times
957bit times
957bit times
67bit times
L-GND
VDD
957bit times
67bit times
D-GND
VDD
67bit times
1981bit times
67bit times
957bit times
957bit times
D-GND
VDISP
67bit times
67bit times
67bit times
957bit times
67bit times
67bit times
957bit times
DIM OUT
VDISP
64bit times
GRID3
L-GND
VDD
L-GND
11/19
¡ Semiconductor
ML9211
FUNCTIONAL DESCRIPTION
Power-on Reset
When power is turned on, the ML9211 is initialized by the internal power-on reset circuit.
The status of the internal circuit after initialization is as follows:
• The contents of the shift registers and latches are set to "0".
• The digital dimming duty cycle is set to "0".
• All segment outputs are set to Low level.
• All grid outputs are set to High level.
Data Transfer Method
Data can be transferred between the rising edge and the next falling edge of chip select input.
The mode data, segment data and dimming data are written by a serial transfer method. The
serial data is input to the shift register at the rising edge of a shift clock pulse.
The mode data (M0 to M2) must be transferred after the segment data and dimming data
succeedingly.
When the chip select input falls, an internal LOAD signal is automatically generated and data is
loaded to the latches.
Function Mode
Function mode is selected by the mode data (M0 to M2). The relation between function mode and
mode data is as follows:
FUNCTION MODE
FUNCTION DATA
OPERATING MODE
M0
M1
M2
0
Segment Data for GRID1-3 Input
0
0
0
1
Segment Data for GRID1 Input
1
0
0
2
Segment Data for GRID2 Input
0
1
0
3
Segment Data for GRID3 Input
1
1
0
4
Digital Dimming Data Input
0
0
1
Segment Data Input [Function Mode: 0 to 3]
• ML9211 receives the segment data when function mode 0 to 3 are selected.
• The same segment data is transferred to the 3 segment data latches corresponding to GRID 1
to 3 at the same time when the function mode 0 is selected.
• The segment data is transferred to only one segment data latch corresponding to the specified
GRID when the function mode is 1, 2 or 3 is selected.
• Segment output (SEG1 to 56) becomes High level (lighting) when the segment data (S1 to S56)
is set to "1".
[Data Format]
Input Data
: 59 bits
Segment Data : 56 bits
Mode Data
: 3 bits
Bit
1
2
3
4
53
56
57
58
59
Input Data
S1
S2
S3
S4
S53 S54 S55 S56
M0
M1
M2
Segment Data (56bits)
54
55
Mode Data
(3bits)
12/19
¡ Semiconductor
ML9211
[Bit correspondence between segment output and segment data]
SEG n
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20
Segment data
S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20
SEG n
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Segment data
S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 S36 S37 S38 S39 S40
SEG n
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
Segment data
S41 S42 S43 S44 S45 S46 S47 S48 S49 S50 S51 S52 S53 S54 S55 S56
Digital Dimming Data Input [Function Mode: 4]
• ML9211 receives the digital dimming data when function mode 4 is selected.
• The output duty changes in the range of 0/1024 (0%) to 1016/1024 (99.2%) for each grid.
• The 10-bit digital dimming data is input from LSB.
[Data Format]
Input Data
: 13 bits
Digital Dimming Data: 10 bits
Mode Data
: 3 bits
Bit
1
2
3
4
5
6
7
8
9
Input Data
D1
LSB
D2
D3
D4
D5
D6
D7
D8
D9
Digital Dimming Data (10bits)
(LSB)
Dimming Data
10
11
12
13
D10 M0 M1 M2
MSB
Mode Data
(3bits)
(MSB)
Duty Cycle
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
0
0
0
0
0
0
0
0
0
0
0/1024
1
0
0
0
0
0
0
0
0
0
1/1024
1
1
1
0
1
1
1
1
1
1
1015/1024
0
0
0
1
1
1
1
1
1
1
1016/1024
1
0
0
1
1
1
1
1
1
1
1016/1024
1
1
1
1
1
1
1
1
1
1
1016/1024
Master Mode
Master Mode is selected when M/S pin is set at High level. The master mode operation is as
follows:
• The input levels of DIM IN, SYNC IN1 and SYNC IN2 are ignored, and these pins should be
connected to L-GND or VDD.
• Brightness is adjusted by the internal digital dimming circuit.
• The segment Latch1 to 3 corresponding to GRID1 to 3 are selected by the internal timing
generator.
13/19
¡ Semiconductor
ML9211
Slave Mode
Slave Mode is selected when M/S pin is set at Low level. The slave mode operation is as follows:
• The internal dimming circuit is ignored.
• The pulse width of SEG1 to 56 are controlled by the pulse width of DIM IN signal.
• The segment Latch1 to 3 corresponding to GRID1 to 3 are selected by SYNC IN1 and SYNC IN2
signals.
• The output levels of GRID1 to 3 are set at High level. The output levels of DIM OUT, SYNC
OUT1 and SYNC OUT2 are set at Low level.
[Correspondence between SYNC IN1, 2 and Segment Latch1 to 3]
SYNC IN 1
SYNC IN 2
Segment Latch
0
0
1
0
0
1
Latch2
GRID2
1
1
Latch3
GRID3
[Correspondence between DIM IN and SEG1 to 56]
GRID
DIM IN
SEG1 to 56
No
No
0
Low
Latch1
GRID1
1
High
Note: Low: Lights OFF
High: Lights ON
14/19
Microcontroller
GND
VDD
R
C
GND
SEG56
GRID1
M/S
GRID2
SYNC IN 2
SYNC IN 1
DIM IN
CS
DATA IN
CLOCK
OSC 0
L-GND
GRID3
SYNC OUT 2
SYNC OUT 1
DIM OUT
VDD
R
D-GND
DUP/TRI
SEG56
GRID1
M/S
GRID2
GND
VDD
C
GND
SEG1
SYNC IN 2
SYNC IN 1
DIM IN
CS
DATA IN
CLOCK
OSC 0
L-GND
GRID3
SYNC OUT 2
SYNC OUT 1
DIM OUT
S1 S2 S3
S110 S111 S112
G1
G2
Duplex VFD Tube
Ef
D-GND
15/19
ML9211
GND
DUP/TRI
VDISP
ML9211
(SLAVE)
¡ Semiconductor
VDD
VDD
SEG1
APPLICATION CIRCUITS
VDD
VDISP
VDISP
ML9211
(MASTER)
1. Circuit for the duplex VFD tube with 128 segments (2 Grid ¥ 112 Anode)
VDD
Microcontroller
VDD
GND
VDD
GND
VDISP
ML9211
(SLAVE)
SEG1
SEG1
M/S
SEG56
GRID1
M/S
SEG56
GRID1
DUP/TRI
GRID2
DUP/TRI
GRID2
SYNC IN 2
SYNC IN 1
DIM IN
CS
DATA IN
CLOCK
GRID3
SYNC OUT 2
SYNC OUT 1
DIM OUT
GND
VDD
R
C
SYNC IN 2
SYNC IN 1
DIM IN
CS
DATA IN
CLOCK
GRID3
SYNC OUT 2
SYNC OUT 1
DIM OUT
D-GND
C
GND
OSC 0
L-GND
G1
G2
S110 S111 S112
Triplex VFD Tube
G3
Ef
R
OSC 0
L-GND
S1 S2 S3
D-GND
ML9211
16/19
GND
VDD
¡ Semiconductor
ML9211
(MASTER)
VDD
VDISP
VDISP
2. Circuit for the triplex VFD tube with 192 segments (3 Grid ¥ 112 Anode)
VDD
¡ Semiconductor
ML9211
NOTES ON TURNING POWER ON/OFF
• Connect L-GND and D-GND externally to be an equal potential voltage.
• To avoid wrong operations, turn on the driver power supply after turning on the logic power
supply. Conversely, turn off the logic power supply after tuning off the driver power supply.
[Voltage]
VDISP
VDD
[Time]
17/19
¡ Semiconductor
ML9211
PACKAGE DIMENSIONS
(Unit : mm)
QFP80-P-1420-0.80-BK
Mirror finish
Package material
Lead frame material
Pin treatment
Solder plate thickness
Epoxy resin
42 alloy
Solder plating
5 mm or more
Package weight (g)
1.27 TYP.
Notes for Mounting the Surface Mount Type Package
The SOP, QFP, TSOP, SOJ, QFJ (PLCC), SHP and BGA are surface mount type packages, which
are very susceptible to heat in reflow mounting and humidity absorbed in storage.
Therefore, before you perform reflow mounting, contact Oki’s responsible sales person for the
product name, package name, pin number, package code and desired mounting conditions
(reflow method, temperature and times).
18/19
¡ Semiconductor
ML9211
(Unit : mm)
QFP80-P-1414-0.65-K
Mirror finish
Package material
Lead frame material
Pin treatment
Solder plate thickness
Package weight (g)
Epoxy resin
42 alloy
Solder plating
5 mm or more
0.85 TYP.
Notes for Mounting the Surface Mount Type Package
The SOP, QFP, TSOP, SOJ, QFJ (PLCC), SHP and BGA are surface mount type packages, which
are very susceptible to heat in reflow mounting and humidity absorbed in storage.
Therefore, before you perform reflow mounting, contact Oki’s responsible sales person for the
product name, package name, pin number, package code and desired mounting conditions
(reflow method, temperature and times).
19/19
E2Y0002-29-62
NOTICE
1.
The information contained herein can change without notice owing to product and/or
technical improvements. Before using the product, please make sure that the information
being referred to is up-to-date.
2.
The outline of action and examples for application circuits described herein have been
chosen as an explanation for the standard action and performance of the product. When
planning to use the product, please ensure that the external conditions are reflected in the
actual circuit, assembly, and program designs.
3.
When designing your product, please use our product below the specified maximum
ratings and within the specified operating ranges including, but not limited to, operating
voltage, power dissipation, and operating temperature.
4.
Oki assumes no responsibility or liability whatsoever for any failure or unusual or
unexpected operation resulting from misuse, neglect, improper installation, repair, alteration
or accident, improper handling, or unusual physical or electrical stress including, but not
limited to, exposure to parameters beyond the specified maximum ratings or operation
outside the specified operating range.
5.
Neither indemnity against nor license of a third party’s industrial and intellectual property
right, etc. is granted by us in connection with the use of the product and/or the information
and drawings contained herein. No responsibility is assumed by us for any infringement
of a third party’s right which may result from the use thereof.
6.
The products listed in this document are intended for use in general electronics equipment
for commercial applications (e.g., office automation, communication equipment,
measurement equipment, consumer electronics, etc.). These products are not authorized
for use in any system or application that requires special or enhanced quality and reliability
characteristics nor in any system or application where the failure of such system or
application may result in the loss or damage of property, or death or injury to humans.
Such applications include, but are not limited to, traffic and automotive equipment, safety
devices, aerospace equipment, nuclear power control, medical equipment, and life-support
systems.
7.
Certain products in this document may need government approval before they can be
exported to particular countries. The purchaser assumes the responsibility of determining
the legality of export of these products and will take appropriate and necessary steps at their
own expense for these.
8.
No part of the contents contained herein may be reprinted or reproduced without our prior
permission.
9.
MS-DOS is a registered trademark of Microsoft Corporation.
Copyright 1999 Oki Electric Industry Co., Ltd.
Printed in Japan