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PDF LC75857E Datasheet ( Hoja de datos )

Número de pieza LC75857E
Descripción Duty LCD Driver
Fabricantes ON Semiconductor 
Logotipo ON Semiconductor Logotipo

Total 30 Páginas
		
LC75857E Hoja de datos, Descripción, Manual
Ordering number : E*N7980
LC75857E
LC75857W
Advance Information
CMOS LSI
1/3, 1/4 Duty LCD Driver
with Key Input Function
http://onsemi.com
Overview
The LC75857E and LC75857W are 1/3 duty and 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.)
1/3 duty and 1/4 duty drive schemes can be controlled from serial data.
1/2 bias and 1/3 bias drive schemes can be controlled from serial data.
Capable of driving up to 126 segments using 1/3 duty and up to 164 segments using 1/4 duty.
Sleep mode and all segments off functions that are controlled from serial data.
Switching between key scan output and segment output can be controlled from the serial data.
The key scan operation enabled/disabled state can be controlled from the serial data.
Switching between segment output port and general-purpose output port can be controlled from serial data.
The common and segment output waveform frame frequency can be controlled from the serial data.
Switching between RC oscillator mode and external clock mode can be controlled from the 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.
(When the logic block supply voltage VDD is in the range 3.6 to 6.0 V, VLCD can be set to a voltage in the range 0.75
VDD to 6.0 V, and when VDD is in the range 2.7 to 3.6 V, VLCD can be set to a voltage in the range 2.7 to 6.0 V.)
Provision of an on-chip voltage-detection type reset circuit prevents incorrect displays.
CCB is ON Semiconductor® ’s original format. All addresses are managed
by ON Semiconductor® for this format.
CCB is a registered trademark of Semiconductor Components Industries, LLC.
This document contains information on a new product. Specifications and information
herein are subject to change without notice.
Semiconductor Components Industries, LLC, 2013
July, 2013
92504TN (OT) No.7980-1/39

1 page

LC75857E pdf
Pin Assignments
LC75857E, LC75857W
KI1
KI2
KI3
KI4
KI5
VDD
VLCD
VLCD1
VLCD2
VSS
TEST
OSC
DO
CE
CL
DI
48
49
64
1
LC75857E/W
33
32
S32
S31
S30
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
17
16
Top view
No. 7980-5/39

5 Page

LC75857E arduino
(2) When CL is stopped at the high level
LC75857E, LC75857W
CE
CL
DI 0 1 0 0 0 0 1 0
B0 B1 B2 B3 A0 A1 A2 A3
DO
D1
D40 D41 D42 D43 D44 0 SP KC0 KC1 KC2 KSC K0 K1 P0 P1 P2 SC DR DT FC0 FC1 FC2 0C 0 0
Display data
Control data
DD
0 1 0 0 0 0 1 0 D45
D84 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
B0 B1 B2 B3 A0 A1 A2 A3 Display data
Fixed data
DD
0 1 0 0 0 0 1 0 D85
D124 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
B0 B1 B2 B3 A0 A1 A2 A3 Display data
Fixed data
DD
0 1 0 0 0 0 1 0 D125
D164 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1
B0 B1 B2 B3 A0 A1 A2 A3 Display data
Fixed data
DD
Note: B0 to B3, A0 to A3 ...... CCB address
DD ................................ Direction data
CCB address............ 42H
D1 to D164 .............. Display data
SP ............................ Normal mode/sleep mode control data
KC0 to KC2 .............. Key scan output state setting data
KSC.......................... Key scan operation enabled/disabled state setting data
K0, K1 ...................... Key scan output/segment output selection data
P0 to P2 .................. Segment output port/general-purpose output port selection data
SC ............................ Segment on/off control data
DR............................ 1/2 bias or 1/3 bias drive selection data
DT ............................ 1/3 duty or 1/4 duty drive selection data
FC0 to FC2 .............. Common and segment output waveform frame frequency setting data
OC............................ RC oscillator mode/external clock mode switching selection data
No. 7980-11/39

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