ADC0804LCWM datasheet(39/48 Pages) TI

Nome de Peças	ADC0804LCWM

Descrição Electrónicos	8-Bit muP Compatible A/D Converters

PDF	48 Pages

Scroll/Zoom	100%

Fabricante Electrônico	TI [Texas Instruments]

Página de início	http://www.ti.com

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39 / 48 page

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SNOSBI1B – NOVEMBER 2009 – REVISED FEBRUARY 2013

The key to decoding circuitry is the DM74LS373, 8-bit D type flip-flop. When the Z-80 acknowledges the

interrupt, the program is vectored to a data input Z-80 subroutine. This subroutine will read a peripheral status

word from the DM74LS373 which contains the logic state of the INTR outputs of all the converters. Each

converter which initiates an interrupt will place a logic "0" in a unique bit position in the status word and the

subroutine will determine the identity of the converter and execute a data read. An identifier word (which

indicates which A/D the data came from) is stored in the next sequential memory location above the location of

the data so the program can keep track of the identity of the data entered.

Figure 64. Flow Chart for Auto-Zero Routine

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Product Folder Links: ADC0801, ADC0802 ADC0803, ADC0804, ADC0805

ADC0804LCWM Folha de dados(PDF) 39 Page - Texas Instruments