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Número de pieza | BU97931FV-LB | |
Descripción | Multifunction LCD Segment Driver | |
Fabricantes | ROHM Semiconductor | |
Logotipo | ||
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No Preview Available ! Datasheet
MAX 112 segments (SEG28×COM4)
Multifunction LCD Segment Driver
BU97931FV-LB
This is the product guarantees long time support in Industrial
market.
Features
Long Time Support Product for Industrial Equipment
Integrated RAM for display data (DDRAM):
28 x 4 bit (Max 112 Segment)
LCD Drive Output:
4 Common Output, Max 28 Segment Output
Integrated 1ch LED Driver Circuit
Segment/GPO (Max 5port) Output Mode Selectable
Support PWM Generation from ext. or Internal Clock
(Resolution: 8bit)
Support Standby Mode
Integrated Power-on-Reset Circuit (POR)
Integrated Oscillator Circuit
No External Component
Low Power Consumption Design
Independent Power Supply for LCD Driving
Support Blink Function
(Blink frequency 1.6, 2.0, 2.6, 4.0Hz selectable)
Key Specifications
■ Supply Voltage Range:
+1.8V to +3.6V
■ LCD Drive Power Supply Range: +2.7V to +5.5V
■ Operating Temperature Range: -40°C to +85°C
■ Max Segments:
112 Segments
■ Display Duty:
Static, 1/3, 1/4 Selectable
■ Bias:
Static, 1/3
■ Interface:
3Wire Serial Interface
Package
W (Typ) x D (Typ) x H (Max)
Applications
Industrial Equipment
Telephone
FAX
Portable Equipment (POS, ECR, PDA etc.)
DSC
DVC
Car audio
Home Electrical Appliance
Meter Equipment
Etc.
Typical Application Circuit
SSOP-B40
13.60mm x 7.80mm x 2.00mm
VLED=5.0V
LED/GPO using case
.0V 3.3V
VLCD
VDD
LED
BU97931 FV-LB
Regarding resistor value
Please detect the value according to
input current value (current MAX = 20mA)
SEG27(GPO0) to
SEG23(GPO4)
Other
device
VSS
CSB SD SCL CLKIN
SEG0 toSEG22
COM0 to COM3
LCD
Input signal from controller
CLKIN
External CLK input terminal
In case being unused, connect to VSS or be opened.
Figure 1. Typical application circuit
○Product structure:Silicon monolithic integrated circuit
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product has no designed protection against radioactive rays.
1/29
TSZ02201-0P4P0D300490-1-2
26.Feb.2014 Rev.002
1 page BU97931FV-LB MAX 112 segments (SEG28×COM4)
I/O Equivalence Circuit
VLCD
VD
VSS
VSS
VD
CSB, SD,
SCL,
CLKIN
VSS
VLCD
SEG23-26
VSS
VLCD
SEG0-22
COM0-3
VSS
LED
VSS
Figure 5. I/O Equivalence Circuit circuit
Datasheet
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/29
TSZ02201-0P4P0D300490-1-2
26.Feb.2014 Rev.002
5 Page BU97931FV-LB MAX 112 segments (SEG28×COM4)
Detailed Command Descriptions
D/C, Data / Command judgment bit (MSB)
For details, please refer to 3-wire serial I/F
Datasheet
1. Mode Set (MODESET)
1st byte command
2nd byte command
MSB
LSB
D/C D6 D5 D4 D3 D2 D1 D0 Hex Reset
1 0 0 0 0 0 0 1 81h
-
0 0 0 0 P3 P2 P1 P0 -
00h
Display Set
Condition
Display OFF
Display ON
P3 Reset state
0○
1
Display OFF: No LCD driving mode (Output: VSS Level)
Turn off OSC circuit and LCD power supply circuit. (Synchronized with frame freq)
Display ON: LCD driving mode
Turn on OSC circuit and LCD power supply circuit.
Read data from DDRAM and display to LCD.
LED port and GPO port output states are not influenced by a Display on/off state
Output state is decided by command setup (OUTSET, GPOSET, PWMSET) and INHb terminal state, respectively.
For more details, please refer to each command description.
LCD drive mode set
Condition
Frame inversion
Line inversion
P2 Reset state
0○
1
Current mode set
Condition
Power save mode1
Power save mode2
Normal mode
High power mode
P1 P0 Reset state
00
○
01
10
11
(Reference data of consumption current)
Condition
Current consumption
Power save mode 1
×1.0
Power save mode 2
×1.7
Normal mode
×2.7
High power mode
×5.0
(Note) The value changes according to the panel load.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/29
TSZ02201-0P4P0D300490-1-2
26.Feb.2014 Rev.002
11 Page |
Páginas | Total 30 Páginas | |
PDF Descargar | [ Datasheet BU97931FV-LB.PDF ] |
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