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ELM621

Part Number	ELM621
Manufacturer	ELM Electronics
Description	SERIAL 3-BIT PORT
Published	Jan 27, 2010
Detailed Description	ELM621 Serial Three Bit Port Description The ELM621 is a serially controlled, three bit parallel I/O port in an 8 pin p...
Datasheet	ELM621 PDF File

Overview

ELM621 Serial Three Bit Port Description The ELM621 is a serially controlled, three bit parallel I/O port in an 8 pin package.
The high level of integration employed means that very few external components are required in order to construct a fully functional circuit with this IC.
The ELM621 offers several convenient features that many users will appreciate.
The provision of a 16 byte buffer allows commands to be chained and executed sequentially with one key stroke.
The controllable pullup resistor on the bit 3 port pin is particularly helpful when interfacing to mechanical switches, while the ability to control character echo reduces overhead while operating under computer control.
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