ICL8068/ICL7104 Просмотр технического описания (PDF) - Intersil

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Компоненты Описание

производитель

ICL8068/ICL7104

14-Bit/16-Bit, Microprocessor Compatible, 2-Chip, A/D Converter

Intersil 

ICL8052/ICL7104, ICL8068/ICL7104

INTEGRATOR OUTPUT

INTERNAL CLOCK

ZERO-CROSSING OCCURS

ZERO-CROSSING DETECTED

FOR -16 MBEN SEQUENCE INSERTED HERE

INTERNAL LATCH

STATUS OUTPUT

MODE INPUT

INTERNAL MODE

UART

NORM

SEN INPUT

SEN

SENSED

SEN

SENSED

TERMINATES

UART MODE

CE/LOAD

HBEN

HIGH BYTE DATA

MODE LOW NOT IN HANDSHAKE MODE

DISABLES OUTPUTS CE/LD, HBEN, MBEN, LBEN

DATA VALID

LBEN

LOW BYTE DATA

LBEN

LOW BYTE DATA

DATA VALID

MODE HIGH ACTIVATES

CE/LD, HBEN, LBEN

DON’T CARE

THREE-STATE HIGH IMPEDANCE

FIGURE 11. HANDSHAKE WITH SEN HELD POSITIVE

DATA VALID

THREE-STATE WITH PULLUP

INTEGRATOR

OUTPUT

INTERNAL

CLOCK

INTERNAL

LATCH

STATUS

OUTPUT

MODE

INPUT

INTERNAL

MODE

SEN INPUT

(UART TBRE)

CE/LOAD

(UART TBRL)

HBEN

HIGH BYTE

DATA

UART

NORM

MBEN

MIDDLE

BYTE DATA

LBEN

LOW BYTE

DATA

ZERO-CROSSING OCCURS

ZERO-CROSSING DETECTED

DATA VALID

DATA VALID

DATA VALID

DON’T CARE

THREE-STATE HIGH IMPEDANCE

FIGURE 12. HANDSHAKE - TYPICAL UART INTERFACE TIMING

5-23

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