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PDF BU97520AKV-M Data sheet ( Hoja de datos )
| Número de pieza | BU97520AKV-M | |
| Descripción | Multi-function LCD Segment Drivers | |
| Fabricantes | ROHM Semiconductor | |
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LCD Segment Drivers
Multi-function LCD Segment Drivers
BU97520AKV-M
MAX 276 Segment(69SEG x 4COM)
General Description
The BU97520AKV-M is 1/4 or 1/3-Duty general-purpose
LCD driver that can be used for frequency display in
electronic tuners under the control of a microcontroller.
The BU97520AKV-M can drive up to 276 LCD
Segments directly. The BU97520AKV-M can also
control up to 6 general-purpose output ports.
These products also incorporate a key scan circuit that
accepts input from up to 30 keys to reduce printed
circuit board wiring.
Features
AEC-Q100 Qualified
Key input function for up to 30 keys. (A key scan is
performed only when a key is pressed.)
Either 1/4 or 1/3-Duty can be selected with the serial
control data.
1/4-Duty drive: Up to 276 segments
1/3-Duty drive: Up to 207 segments
Serial data control of frame frequency for common
and segment output waveforms.
Serial data control of switching between the segment
output port , PWM output port and general-purpose
output port functions.(Max 6 port)
Built-in OSC circuit
The INHb pin can force the display to the off state.
Integrated Power-on Reset circuit
No external component required
Low power consumption design
Supports Line and Frame Inversion
Key Specifications
Supply Voltage Range:
Operating Temperature Range:
Max Segments:
Display Duty:
Bias:
Interface:
+2.7V to +6.0V
-40°C to +85°C
276 Segments
1/3, 1/4 selectable
1/2, 1/3 selectable
3wire serial interface
Packages
VQFP80
W(Typ.)×D(Typ.)×H(Max.)
VQFP80
14.00mm x 14.00mm x 1.60mm
Applications
Car audio, Home electrical appliance,
Meter equipment etc.
Typical Application Circuit
Key matrix
+5V
(Note1)
From
Controller
To Controller
KS1/S56
|
KS6/S61
VDD
INHb
SCE
SCL
SDI
SDO
KI1/S62
|
KS5/S66
COM1
COM2
COM3
COM4
S1/P1/G1
S2/P2/G2
S6/P6/G6
S7
S66
S67
S68
OSC/S69
(P1/G1)
(P6/G6)
(General purpose/PWM ports)
(For use control of backlight)
LCD Panel
(Up to 276
Segments)
(Note1) Insert capacitors between VDD and VSS C > 0.1uF.
Figure 1. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays
.www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
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1 page  
BU97520AKV-M
1. When SCL is stopped at the low level
SCE
VIH1
SCL 50%
VIL1
VIH1
SDI
VIL1
tr
tds
tchw
tclw
tf
tdh
VIH1
tcp tcs
Datasheet
VIL1
tch
2. When SCL is stopped at the high level
VIH1
SCE
SCL
tf
SDI
tclw
tchw
tr
tds tdh
VIH1
50%
VIL1
VIH1
VIL1
tcp tcs
Figure 5. Serial Interface Timing
VIL1
tch
Pin Description
Symbol
S1/P1/G1 to
S6/P6/G6
S7 to S55
S67,S68
KS1/S56 to
KS6/S61
KI1/S62 to
KI5/S66
COM1 to COM4
S69/OSC
SCE
SCL
SDI
SDO
Pin No.
79,80,
1 to 4,
5 to 53,
69,71
54 to 59
60 to 64
65 to 68
74
76
77
78
72
Function
Active
I/O
Handling
when unused
Segment output for displaying the display data transferred
-O
OPEN
by serial data input. The S1/P1/G1 to S6/P6/G6 pins can
also be used as General-purpose outputs when so set up
by the control data.
Segment output for displaying the display data transferred
-O
OPEN
by serial data input.
Key scan outputs
-O
OPEN
Although normal key scan timing lines require diodes to be
inserted in the timing lines to prevent shorts, since these
outputs are unbalanced CMOS transistor outputs, these
outputs will not be damaged by shorting when these outputs
are used to form a key matrix. The KS1/S56 to KS6/S61
pins can be used as segment outputs when so specified by
the control data.
Key scan inputs
- I/O
OPEN
These pins have built-in pull-down resistors.
The KI1/S62 to KI5/S66 pins can be used as segment
outputs when so specified by the control data.
Common driver output pins. The frame frequency is fo[Hz].
-O
OPEN
Segment output for displaying the display data transferred
- I/O
OPEN
by serial data input.
The pin S69/OSC can be used external frequency input pin
when set up by the control data.
Serial data transfer inputs. Must be connected to the
GND
controller.
HI
SCE: Chip enable
↑I
SCL: Clock for serial data transfer.
-I
SDI: Transfer data
Output data
-O
OPEN
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
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BU97520AKV-M
Datasheet
Control Data Functions
1. KM0 to KM2: Key Scan output port/Segment output port control data
These control data bits switch the functions of the KS1/S56 to KS6/S61 output pins between key scan output and segment
output.
KM0
0
0
0
0
1
1
1
1
KM1
0
0
1
1
0
0
1
1
KM2
0
1
0
1
0
1
0
1
KS1/S56
KS1
S56
S56
S56
S56
S56
S56
S56
KS2/S57
KS2
KS2
S57
S57
S57
S57
S57
S57
Output Pin State
KS3/S58 KS4/S59
KS3 KS4
KS3 KS4
KS3 KS4
S58 KS4
S58 S59
S58 S59
S58 S59
S58 S59
KS5/S60
KS5
KS5
KS5
KS5
KS5
S60
S60
S60
KS6/S61
KS6
KS6
KS6
KS6
KS6
KS6
S61
S61
Maximum Number
of Input keys
30
25
20
15
10
5
0
0
2. P0 to P2: Segment / PWM / General Purpose output port control data
These control bits are used to select the function of the S1/P1 to S6/P6 output pins (Segment Output Pins or PWM Output
Pins or General Purpose Output Pins).
P0 P1
P2 S1/P1/G1 S2/P2/G2 S3/P3/G3 S4/P4/G4 S5/P5/G5 S6/P6/G6
00
0
S1
S2
S3
S4
S5
S6
00
1 P1/G1 S2
S3
S4
S5
S6
01
0
P1/G1
P2/G2
S3
S4
S5
S6
01
1
P1/G1
P2/G2
P3/G3
S4
S5
S6
10
0
P1/G1
P2/G2
P3/G3
P4/G4
S5
S6
10
1
P1/G1
P2/G2
P3/G3
P4/G4
P5/G5
S6
11
0
P1/G1
P2/G2
P3/G3
P4/G4
P5/G5
P6/G6
11
1
S1
S2
S3
S4
S5
S6
PWM output or General Purpose output is selected by PGx (x=1 to 6) control data bit.
When the General Purpose Output Port Function is selected, the correspondence between the output pins and the
respective display data is given in the table below.
Output Pins
Corresponding Display Data
1/4-Duty mode
1/3-Duty mode
S1/P1/G1
D1
D1
S2/P2/G2
D5
D4
S3/P3/G3
D9
D7
S4/P4/G4
D13
D10
S5/P5/G5
D17
D13
S6/P6/G6
D21
D16
When the General Purpose Output Port Function is selected, the respective output pin outputs a “HIGH” level when its
corresponding display data is set to “1”. Likewise, it will output a “LOW” level, if its corresponding display data is set to “0”.
For example, S4/P4/G4 is used as a General Purpose Output Port in case of 1/4-Duty, if its corresponding display data – D13
is set to “1”, then S4/P4/G4 will output “HIGH” level. Likewise, if D13 is set to “0”, then S4/P4/G4 will output “LOW” level.
3. DR: 1/3-Bias drive or 1/2-Bias drive control data
This control data bit selects either 1/3-Bias drive or 1/2-Bias drive.
DR Bias Drive Scheme
0 1/3-Bias drive
1 1/2-Bias drive
4. FL: Line Inversion or Frame Inversion control data
This control data but selects either Line Inversion or Frame Inversion.
FL Inversion Setting
0 Line
1 Frame
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/41
TSZ02201-0P4P0D300570-1-2
17.Apr.2014 Rev.004
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BU97520AKV-M.PDF ] | |
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