|
|
|
LC75863E Schematic ( PDF Datasheet ) - Sanyo Semicon Device
| Teilenummer | LC75863E |
|
| Beschreibung | 1/3 Duty LCD Display Drivers with Key Input Function | |
| Hersteller | Sanyo Semicon Device | |
| Logo |  |
|
Gesamt 24 Seiten 
Ordering number : ENN7135
CMOS IC
LC75863E, 75863W
1/3 Duty LCD Display Drivers with Key Input Function
Overview
The LC75863E and LC75863W are 1/3 duty LCD display
drivers that can directly drive up to 75 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.)
• 1/3duty - 1/2bias and 1/3duty - 1/3bias drive schemes
can be controlled from serial data (up to 75 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.
• Independent VLCD for the LCD driver block (VLCD can
be set to in the range VDD-0.5 to 6.0 volts.)
• Provision of an on-chip voltage-detection type reset
circuit prevents incorrect displays.
• RC oscillator circuit.
Package Dimensions
unit: mm
3156-QIP48E
1.5
36
37
[LC75863E]
17.2
14.0
1.0 0.35
1.6
1.5
25
24
0.15
48
1
13
12
0.1
2.7
0.8 15.6
SANYO: QIP48E
unit: mm
3163A-SQFP48
[LC75863W]
9.0
7.0
0.75 0.5 0.18
36
37
25
0.75 0.15
24
• 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.
48
1
13
12
0.5 0.5
SANYO: SQFP48
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
D2001TN (OT) No. 7135-1/24
 
LC75863E, 75863W
Pin Functions
Pin
S1/P1
S2/P2
S3/P3
S4/P4
S5 to S23
COM1
COM2
COM3
KS1/S24
KS2/S25
KS3 to KS6
KI1 to KI5
OSC
Pin No.
Function
1
2
3
4
5 to 23
24
25
26
27
28
29 to 32
33 to 37
Segment outputs for displaying the display data transferred by serial data input.
The S1/P1 to S4/P4 pins can be used as general-purpose output ports under serial
data control.
Common driver outputs
The frame frequency fo is given by : fo = (fOSC/384)Hz.
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/S24 and KS2/S25 pins can be used as segment outputs when so
specified by the control data.
Key scan inputs
These pins have built-in pull-down resistors.
Oscillator connection
44 An oscillator circuit is formed by connecting an external resistor and capacitor at this
pin.
Active
—
—
—
H
—
CE
CL
DI
DO
TEST
VLCD1
VLCD2
46 Serial data interface connections to the controller. Note that DO, being an open-drain
output, requires a pull-up resistor.
47 CE :Chip enable
CL :Synchronization clock
48 DI :Transfer data
45 DO :Output data
43 This pin must be connected to ground.
Used for applying the LCD drive 2/3 bias voltage externally. Must be connected to
40 VLCD2 when a 1/2 bias drive scheme is used.
Used for applying the LCD drive 1/3 bias voltage externally. Must be connected to
41 VLCD1 when a 1/2 bias drive scheme is used.
H
v
—
—
—
—
—
VDD
VLCD
VSS
38 Logic block power supply connection. Provide a voltage of between 4.5 and 6.0V.
—
LCD driver block power supply connection. Provide a voltage of between VDD–0.5 and
39 6.0V.
—
42 Power supply connection. Connect to ground.
—
I/O
Handling
when unused
q OPEN
q OPEN
O OPEN
I GND
I/O VDD
I
I GND
I
O OPEN
I—
I OPEN
I OPEN
——
——
——
No. 7135-6/24
6 Page 
LC75863E, 75863W
Key Scan Operation Functions
1. Key scan timing
The key scan period is 288T(s). To reliably determine the on/off state of the keys, the LC75863E/W scans the keys
twice and determines that a key has been pressed when the key data agrees. It outputs a key data read request (a low
level on DO) 615T(s) after starting a key scan. If the key data dose not agree and a key was pressed at that point, it
scans the keys again. Thus the LC75863E/W cannot detect a key press shorter than 615T(s).
KS1 *3 1 1 *3
KS2 *3
2
2 *3
KS3 *3
3
3 *3
KS4 *3
4
4 *3
KS5 *3
5
5 *3
KS6 6 6
1
T=
fosc
Key on
576T[s]
Note: *3.In sleep mode the high/low state of these pins is determined by the S0 and S1 bits in the control data. Key scan output signals are not output from
pins that are set low.
2. In normal mode
• The pins KS1 to KS6 are set high.
• When a key is pressed a key scan is started and the keys are scanned until all keys are released. Multiple key
presses are recognized by determining whether multiple key data bits are set.
• If a key is pressed for longer than 615T(s) (Where T= —fo1—sc ) the LC75863E/W outputs a key data read request (a
low level on DO) to the controller. The controller acknowledges this request and reads the key data. However, if
CE is high during a serial data transfer, DO will be set high.
• After the controller reads the key data, the key data read request is cleared (DO is set high) and the LC75863E/W
performs another key scan. Also note that DO, being an open-drain output, requires a pull-up resistor (between 1
and 10 kΩ).
Key input 1
Key input 2
Key scan
CE
DI
DO
615T[s]
Serial data
transfer
Serial data Key address
transfer (43H)
615T[s]
Serial data
transfer Key address
615T[s]
Key address
Key data read
Key data read request
Key data read
Key data read request
Key data read
Key data read request
T= 1
fosc
No. 7135-12/24
12 Page | ||
| Seiten | Gesamt 24 Seiten | |
| PDF Download | [ LC75863E Schematic.PDF ] | |
Link teilen
Besondere Datenblatt
| Teilenummer | Beschreibung | Hersteller |
| LC75863E | 1/3 Duty LCD Display Drivers with Key Input Function | Sanyo Semicon Device |
| LC75863W | 1/3 Duty LCD Display Drivers with Key Input Function | Sanyo Semicon Device |
| LC75863W | 1/3 Duty LCD Display Driver |  ON Semiconductor |
| Teilenummer | Beschreibung | Hersteller |
| CD40175BC | Hex D-Type Flip-Flop / Quad D-Type Flip-Flop. |
 Fairchild Semiconductor |
| KTD1146 | EPITAXIAL PLANAR NPN TRANSISTOR. |
 KEC |
| www.Datenblatt-PDF.com | 2020 | Kontakt | Suche |