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PDF BU91520KV-M Data sheet ( Hoja de datos )
| Número de pieza | BU91520KV-M | |
| Descripción | Low Duty LCD Segment Driver | |
| Fabricantes | ROHM Semiconductor | |
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Datasheet
Low Duty LCD Segment Driver
for Automotive application
BU91520KV-M
MAX 276 Segments (69SEG × 4COM)
General Description
The BU91520AKV-M is 1/4 or 1/3-Duty general-purpose
LCD driver that can be used for automotive applications.
It can support operating temperature of up to +105°C
and qualified for AEC-Q100 Grade2, as required for
automotive applications..
It can drive up to 276 LCD Segments directly. It can
control up to 6 general-purpose output ports. It can also
support a key scan function that detects a maximum of
30 key inputs.
Features
AEC-Q100 Qualified (Note1)
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 ports)
Built-in OSC circuit
The INHb pin can force the display to the off state
Integrated Power-on Reset Circuit
No external component
Low power consumption design
Supports Line and Frame Inversion
(Note1) Grade 2
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 +105°C
■ Max Segments:
276 Segments
■ Display Duty
1/3, 1/4 Selectable
■ Bias:
1/2, 1/3 Selectable
■ Interface:
3wire Serial Interface
Special Characteristics
■ Electrostatic Discharge Voltage(HBM):
■ Latch-up Current:
±2000V
±100mA
Package
VQFP80
W (Typ.) x D (Typ.) x H (Max.)
VQFP80
14.00mm x 14.00mm x 1.60mm
Typical Application Circuit
Key matrix
(P1/G1)
(P6/G6)
(General purpose/PWM ports)
(For use control of backlight)
KS1/S56
|
KS6/S61
KI1/S62
|
KS5/S66
COM1
COM2
COM3
COM4
S1/P1/G1
S2/P2/G2
+5V
(Note2)
From
Co n troll er
To Controller
VDD
INHb
SCE
SCL
SDI
SDO
S6/P6/G6
S7
S66
S67
S68
OSC/S69
LCD Panel
(Up to 276
Seg men ts )
(Note2) 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
© 2016 ROHM Co., Ltd. All rights reserved.
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BU91520KV-M
1. When SCL is stopped at the low level
SCE
SCL
SDI
SDO
VIH1
VIL1
tr
VIH1
VIL1
tccyc
tchw
tclww
tf
tds tdh
2. When SCL is stopped at the high level
SCL
VIH1
VIL1
tccyc
tclww
tchw
tf tr
SDI
VIH1
VIL1
tds tdh
SDO
VIH1
tcs
tclwr
VIL1
tch
tclwr
tcp
VOL5
tdc
VIL1
tdr
tch
VOL5
tdc
tdr
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
Figure 5. Serial Interface Timing
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
controller.
HI
-
SCE: Chip enable
↑I
-
SCL: Clock for serial data transfer.
-I
-
SDI: Transfer data
Output data
-O
OPEN
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
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BU91520KV-M
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
Reset
condition
○
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 Reset condition
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
Reset condition
○
4. FL: Line Inversion or Frame Inversion control data
This control data but selects either Line Inversion or Frame Inversion.
FL
Inversion Setting
Reset condition
0 Line ○
1 Frame
Typically, when driving large capacitance LCD, Line inversion will increase the influence of crosstalk.
Regarding driving waveform, refer to LCD driving waveform.
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
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11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BU91520KV-M.PDF ] | |
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