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BL55028

BELLING
Part Number BL55028
Manufacturer BELLING
Description LCD Driver
Published Jul 18, 2015
Detailed Description BL55028 Shanghai Belling Corp., Ltd zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 LCD Driver for 76 Display Un...
Datasheet PDF File BL55028 PDF File

BL55028
BL55028

Overview
BL55028 Shanghai Belling Corp.
, Ltd zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 LCD Driver for 76 Display Units BL55028 1 General Description The BL55028 is a general LCD driver IC for 76 units LCD panel.
It features a wide operating supply voltage range, incorporates simple communication interface with microcomputer and is suitable for multiple application.
2 Features Advanced low power CMOS Technology Selection of 1/2 or 1/3 bias, selection of 1/2 or 1/3 or 1/4 duty.
Operation voltage: 2.
5~5.
5V Serial data interface 76(19x4) Display Units Low power dissipation design: Power saving mode: Idd=14uA at 5V and Idd=9uA at 3.
3V; On-chip RC oscillator VLCD for adjusting LCD operating voltage Excellent EMC immunity Compatible with general microcomputer SOP28 package 3 Pin Assignment S18 SDA SCL VDD VSS VLCD BP0 BP2 BP1 BP3 S0 S1 S2 S3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 S17 27 S16 26 S15 25 S14 24 S13 23 S12 22 S11 21 S10 20 S9 19 S8 18 S7 17 S6 16 S5 15 S4 Fig 1 1 BL55028 4 Pin Description Pin No.
2 3 4 5 6 7-10 11-28、1 Shanghai Belling Corp.
, Ltd zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 Pin name SDA SCI Vdd Vss Vlcd Com0、Com2、Com1、Com3 S0——S18 Tab.
1 Function Serial data input/output Serial clock input Supply voltage ground LCD supply voltage Common terminal driving output Segment terminal driving output 5 Function Description 1.
function circuit The BL550028 has all function circuits that can directly drive any static or multiplexed LCD containing up to four commons and up to 19 segments.
The function circuits include:Power-on reset, LCD bias generator, LCD voltage selector, Oscillator, display RAM, Timing, Display latch, Shift register, Common/segment outputs, input/output bank selector, Blinker, Data pointer, etc.
2.
display function decription The display RAM is a static 19x 4-bit RAM which stores LCD data.
A logic 1 in the RAM bit-map indicates the on state of the corresponding LCD segment; similarly, a logic 0 indicates the off s...


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