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CH455

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 PDF File

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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