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PDF LC75854W Data sheet ( Hoja de datos )
| Número de pieza | LC75854W | |
| Descripción | 1/4 Duty LCD Display Drivers with Key Input Function | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number : ENN5066B
CMOS IC
LC75854E, 75854W
1/4 Duty LCD Display Drivers
with Key Input Function
Overview
The LC75854E and LC75854W are 1/4 duty LCD display
drivers that can directly drive up to 164 segments and can
control up to four 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
• Key input function for up to 30 keys (A key scan is
performed only when a key is pressed.)
• 1/4 duty - 1/2 bias and 1/4 duty - 1/3 bias drive schemes
can be controlled from serial data (up to 164 segments).
• Sleep mode and all segments off functions that are
controlled from serial data
• Segment output port/general-purpose output port
function switching that is controlled from serial data
• Serial data I/O supports CCB format communication
with the system controller.
• Direct display of display data without the use of a
decoder provides high generality.
• Provision of an on-chip voltage-detection type reset
circuit prevents incorrect displays.
• RC oscillator circuit
Package Dimensions
unit: mm
3159-QFP64E
1.0
48
49
[LC75854E]
17.2
14.0
1.6
0.8
0.35
1.0
33
32
0.15
64
1
17
16
0.1
2.7
unit: mm
3190-SQFP64
15.6
0.8
SANYO: QFP64E
1.25
48
49
[LC75854W]
12.0
10.0
0.5 0.18
1.25
33
32
0.15
64
1
17
16
• CCB is a trademark of SANYO ELECTRIC CO., LTD.
• CCB is SANYO’s original bus format and all the bus
addresses are controlled by SANYO.
0.5 0.5
SANYO: SQFP64
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
O3099TH (OT)/N3095HA (OT)/52295TH (OT) No. 5066-1/25
1 page  
Block Diagram
LC75854E, 75854W
Pin Assignment
No. 5066-5/25
5 Page 
Serial Data Output
1. When CL is stopped at the low level
LC75854E, 75854W
2. When CL is stopped at the high level
Output data
Output data
• CCB address...............43H
• KD1 to KD30 .............Key data
• SA...............................Sleep acknowledge data
Note: If a key data read operation is executed when DO is high, the read key data (KD1 to KD30) and sleep
acknowledge data (SA) will be invalid.
Output Data
1. KD1 to KD30: Key data
When a key matrix of up to 30 keys is formed from the KS1 to KS6 output pins and the KI1 to KI5 input pins and
one of those keys is pressed, the key output data corresponding to that key will be set to 1. The table shows the
relationship between those pins and the key data bits.
KS1/S40
KS2/S41
KS3
KS4
KS5
KS6
KI1
KD1
KD6
KD11
KD16
KD21
KD26
KI2
KD2
KD7
KD12
KD17
KD22
KD27
KI3
KD3
KD8
KD13
KD18
KD23
KD28
KI4
KD4
KD9
KD14
KD19
KD24
KD29
KI5
KD5
KD10
KD15
KD20
KD25
KD30
When the KS1/S40 and KS2/S41 output pins are selected to be segment outputs by control data bits K0 and K1 and a
key matrix of up to 20 keys is formed using the KS3 to KS6 output pins and the KI1 to KI5 input pins, the KD1 to
KD10 key data bits will be set to 0.
2. SA: Sleep acknowledge data
This output data bit is set to the state when the key was pressed. Also, while DO will be low in this case, if serial data
is input and the mode is set (to normal or sleep mode) during this period, that mode will be set. SA will be 1 in sleep
mode and 0 in normal mode.
No. 5066-11/25
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet LC75854W.PDF ] | |
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