Part Number
|
CH455 |
Manufacturer
|
ETC |
Description
|
LED drive and keyboard control chip |
Published
|
Jun 16, 2015 |
Detailed Description
|
English DataSheet of CH455
1
LED drive and keyboard control chip CH455
English DataSheet Version:1C http://wch.cn
1. I...
|
Datasheet
|
CH455
|
Overview
English DataSheet of CH455
1
LED drive and keyboard control chip CH455
English DataSheet Version:1C http://wch.
cn
1.
Introduction
CH455 is LED display drive and keyboard scan control chip.
It sets clock surge circuit internally to drive four bits number LED or thirty two LEDs dynamically.
And at the same time it can scan 28-key.
CH455 exchanges data with MCU via two wires serial interface of SCL and SDA.
.
MCU etc
SCL SDA
INT#
CH455
(broken line is optional)
SEG7~SEG0 SEG6 ~
7×4 matrix 28 keys board
DIG3~DIG0
4 bits LED Or 32 LEDs
2.
Features
● Set display current drive layer internally, the current of segment is no less than 25mA, the current of word is no less than 160mA.
● Display ...
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