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BU97550KV-M Datasheet

Multi-function LCD Segment Drivers

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Datasheet
LCD Segment Drivers
Multi-function LCD Segment Drivers
BU97550KV-M
MAX 528 Segment(66SEGx8COM)
General Description
The BU97550KV-M is 1/8, 1/7, 1/5, 1/4, 1/3, or 1/1 duty
general-purpose LCD driver that can be used for
frequency display in electronic tuners under the control of
a microcontroller. The BU97550KV-M can drive up to 528
LCD Segments directly. The BU97550KV-M can also
control up to 9 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 (Note)
Key input function for up to 30 keys (A key scan is
performed only when a key is pressed.)
Either 1/8, 1/7, 1/5, 1/4, 1/3 or 1/1 duty (static)
can be selected with the serial control data.
1/8 duty drive: Up to 528 segments can be driven
1/7 duty drive: Up to 469 segments can be driven
1/5 duty drive: Up to 345 segments can be driven
1/4 duty drive: Up to 280 segments can be driven
1/3 duty drive: Up to 210 segments can be driven
1/1 duty drive: Up to 70 segments can be driven
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 9 ports)
Built-in OSC circuit
Integrated Power-on Reset Circuit
No external component
Low power consumption design
Supports Line and Frame Inversion
(Note) Grade 3
Applications
Car Audio, Home Electrical Appliance,
Meter Equipment etc.
Key Specifications
Supply Voltage Range:
+2.7V to +6.0V
Operating Temperature Range: -40°C to +85°C
Max Segments:
528 Segments
Display Duty 1/1, 1/3, 1/4, 1/5, 1/7, 1/8 Selectable
Bias:
1/1, 1/2, 1/3, 1/4 Selectable
Interface:
3wire Serial Interface
Package
W (Typ.) x D (Typ.) x H (Max.)
VQFP80
14.00mm x 14.00mm x 1.60mm
Typical Application Circuit
Key Matrix
+5V
(Note2)
KS1 / S53
KS6 / S58
VDD
KI1 / S59
KI5 / S63
COM1
COM2
COM3
COM4
COM5/S67
COM6/S66
COM7/S65
COM8/S64
P1/G1
P9/G9
(General Purpose/PWM Ports)
(For control of backlight)
From Control
To Control
SCE
SCL
SDI
SDO
S1/P1/G1
S9/P9/G9
S10
LCD Panel
(Up to 528 Segments)
(Note2) Insert capacitors
between VDD and VSS C≥0.1uF
S52
S68
S69
OSC_IN/S70
Figure 1. Typical Application Circuit
Product structureSilicon monolithic integrated circuit
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed protection against radioactive rays.
1/69
TSZ02201-0P4P0D300980-1-2
09.Jul.2015 Rev.002


Rohm Semiconductor Electronic Components Datasheet

BU97550KV-M Datasheet

Multi-function LCD Segment Drivers

No Preview Available !

BU97550KV-M
Block Diagram
COMMON Driver
・・・
・・・
SEGMENT Driver/Latch
OSC_IN / S70
SCE
SCL
SDI
SDO
VDD
VSS
Clock /Timing
Generator
Control Register
PWM Register
Serial
Interface
POR
LCD voltage
Generator
VLCD
VLCD1
VLCD2
VLCD3
VSS
Shift Register
KEY BUFFER
KEY SCAN
Pin Arrangement
Figure 2. Block Diagram
KI5 / S63
COM8 / S64
COM7 / S65
COM6 / S66
COM5 / S67
COM4
COM3
COM2
COM1
VDD
VSS
S68
SDO
S69
OSC_IN / S70
SCE
SCL
SDI
S1 / P1 / G1
S2 / P2 / G2
61
80
40
S42
S41
S40
S39
S38
S37
S36
S35
S34
S33
S32
S31
S30
S29
S28
S27
S26
S25
S24
S23
21
Figure 3. Pin Configuration (TOP VIEW)
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/69
TSZ02201-0P4P0D300980-1-2
09.Jul.2015 Rev.002


Part Number BU97550KV-M
Description Multi-function LCD Segment Drivers
Maker ROHM
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BU97550KV-M Datasheet PDF






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