CH450 - LED drive and keyboard controller

Product Overview

Datasheet Details

Part number	CH450
Manufacturer	ETC
File Size	227.66 KB
Description	LED drive and keyboard controller
Datasheet	CH450 Datasheet
Additional preview pages of the CH450 datasheet.

Product details

Description

Positive power, the persistent current is no less than 100mA Public ground, the persistent current is no less than 100mA Segment drive of numeric LEDs, high-level active, keyboard scan input, high-level active, with pull-down resistor Word drive of numeric LEDs, low-level active, keyboard scan output, high-level active DIG2～DIG7 4 SDA Data input and output of two wires serial interface 3 9 SCL RSTH Data clock of two wires serial interface, with pull-up resistor internal Power up reset out

Features

Set display current drive layer internal, the segment current is no less than 15mA, the word current is no less than 80mA.
Dynamically display scan control, directly drive six bits numeric LEDs or forty eight LEDs.
Set forty eight keys keyboard controller internal, basic on 8×6 matrix keyboard scan.
Set pull-down resistor internal on the key pressed station, and set eliminate dithering circuit internal.
Supplies keyboard interrupt active with low-level, supplies key.

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Published: Jan 15, 2012 |