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Rohm Semiconductor Electronic Components Datasheet

BU97501KV Datasheet

Multifunction LCD Segment Driver

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Datasheet
Multifunction LCD Segment Driver
BU97501KV MAX 204 segments (51SEG×4COM)
Features
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
1/4 duty driveUp to 204 segments
1/3 duty driveUp to 156 segments
Integrated RAM for display data (DDRAM)
Segment/GPO (Max 4port) output mode selectable
Support standby mode
Integrated Power-on Reset circuit
Integrated Oscillator circuit
No external component
Low power consumption design
Applications
Telephone
FAX
Portable equipment (POS, ECR, PDA etc.)
DSC
DVC
Car audio
Home electrical appliance
Meter equipment
Key Specifications
Supply Voltage Range:
2.7V to 6.0V
LCD drive power supply Range:
4.5V to 6.0V
Operating Temperature Range: -40°C to +85°C
Max Segments:
204 Segments
Display Duty:
1/3, 1/4 selectable
Bias:
1/2, 1/3 selectable
Interface:
3wire serial interface
Package
VQFP64
W(Typ.)×D(Typ.)×H(Max.)
VQFP64
12.00mm x 12.00mm x 1.60mm
Typical Application Circuit
KMeyatMrixatrix
+5V
(Note1)
+5.5V
(Note1)
From
Controller
To Controller
KS1/S42
|
KS6/S47
VDD
KI1/S48
|
KI5/S52
COM1
COM2
COM3
P1/S1
P2/S2
VLCD
OSC
RESB
CSB
SCL
SD
DO
P4/S4
S5
S40
COM4/S41
(P1)
(P2) (General purpose ports)
(For use control of backlight)
(P4)
LCD Panel
(Up to 204
Segments)
(Note1) Insert capacitors between VDD/VLCD and VSS C0.1uF.
Figure 1. Typical Application Circuit
Product structureSilicon monolithic integrated circuit
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed for protection against radioactive rays.
1/30
TSZ02201-0P4P0D300390-1-2
11.Apr.2014 Rev.004


Rohm Semiconductor Electronic Components Datasheet

BU97501KV Datasheet

Multifunction LCD Segment Driver

No Preview Available !

BU97501KV
Block Diagram / Pin Configuration / Pin Description
VLCD
LCD VOLTAGE
GENERATOR
+-
+-
COMMON
DRIVER
OSC
DO
SD
SCL
CSB
VDD
CLOCK
GENERATOR
3-SPI
INTERFACE
P.O.R
SEGMENT DRIVER & LATCH
SHIFT REGISTER
CONTROL
REGISTER
KEY BUFFER
KEY SCAN
49
KS5/S46
S46
KS6/S47
S47
KI1/S48
S48
KI2/SS4499
KI3/S50
S50
KI4/S51
S51
KI5/S52
S52
OSC
RESB
DO
TEST
CSB
SCL
SD
VLCD
VDD
VSS
64
Datasheet
32
S32
S31
S30
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
17
Figure 2. Block Diagram
Figure 3. Pin Configuration (TOP VIEW)
Terminal
Terminal
No.
I/O
Handling When
Unused
Functions
CSB
59 I
VDD
Chip select : “L” active
SCL
60 I
VSS
Serial data transfer clock
SD
61 I
VSS
Input serial data
VDD
63 -
- Power Supply for the logic
OSC
DO
RESB
56
I/O
OPEN/VSS
External Clock Input:
Fix to low or open when the internal clock mode setting.
58 O
OPEN
Output data
Reset Input:
57 I
VDD
RESB=“L” : Display is disabled.
RESB=“H” : Display is controllable.
However, serial data can not be transferred when RESB is “L”.
VSS
64 -
- Power supply pin. Must be connected to ground.
VLCD
62 -
- Power Supply for the LCD driver
COM1~COM3 41 to 43 O
OPEN
COMMON output for LCD driver
COM4/S41
S1/P1~S4/P4
S5~S40
44 O
1 to 4
5 to 40
O
O
KS1/S42~KS6/S47 45 to 50 O
KI1/S48~KI5/S52 51 to 55 I/O
OPEN
OPEN
OPEN
OPEN
OPEN
COMMON / SEGMENT output for LCD driver.
Assigned as SEGMENT output in 1/3Duty mode.
SEGMENT output for LCD driving / General Purpose Output
S1/P1S4/P4 pins can also be used as General Purpose
Outputs when set up by the control data.
SEGMENT output for LCD driver
Key scan outputs
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/S42 to KS6/S47 pins can be used as segment
outputs when specified by the control data.
Key scan inputs
These pins have built-in pull-down resistors.
The KI1/S48 to KI5/S52 pins can be used as segment outputs
when specified by the control data.
Table 1. Pin Description
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/30
TSZ02201-0P4P0D300390-1-2
11.Apr.2014 Rev.004


Part Number BU97501KV
Description Multifunction LCD Segment Driver
Maker ROHM
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