Rainbow-electronics DS1854 Bedienungsanleitung PDF herunterladen (Seite 8)

DS1854

Dual Temperature-Controlled Resistors with

Two Monitors

8 _____________________________________________________________________

DEVICE

ADDRESS

AD (AUXILIARY DEVICE ENABLE A0h)

MD (MAIN DEVICE ENABLE)

DEVICE ADDRESS

ADDRESS

R/W

TxF

DATA BUS

R/W

TxF

RxL

LOS

ADEN ADFIX

SDA

SCL

IN1

OUT1

2-WIRE

INTERFACE

MINT

INV1

Tx FAULT

IN2

RHIZ

MON1

MON2

GND

WPEN

OUT2

INV2

EEPROM

128 x 8 BIT

00h-7Fh

STANDARDS

PROT

AUX

ADDRESS

TABLE

SELECT

R/W

EEPROM

72 x 8 BIT

80h-C7h

TABLE 02

RESISTOR 0

LOOK-UP

TABLE

PROT

MAIN

EEPROM

72 x 8 BIT

80h-C7h

SRAM

32 x 8 BIT

60h-7Fh

NOT PROTECTED

PROT

MAIN

TEMP INDEX

ALARM FLAGS

MUX

CTRL

MEASUREMENT

ADDRESS

TABLE

SELECT

R/W

EEPROM

72 x 8 BIT

80h-C7h

TABLE 03

RESISTOR 1

LOOK-UP

TABLE

PROT

MAIN

TEMP INDEX

RHIZ

WPEN

MONITORS LIMIT

HIGH

MONITORS LIMIT

LOW

TABLE SELECT

TEMP INDEX

MINT (BIT)

INTERNAL

TEMP

MUX

A/D

12-BIT

A/D

CTRL

PROT AUX

PROT MAIN

MPEN

APEN

COMPARATOR

MEASUREMENT

ALARM FLAGS

MONITORS LIMIT LOW

MONITORS LIMIT HIGH

COMP CTRL

INTERRUPT

MINT

TABLE 01

EEPROM

16 x 8 BIT

80h-8Fh

VENDOR

PROT

MAIN

MD R/W

DEVICE ADDRESS

ADDRESS

TABLE SELECT

MASKING (TMP, V

, MON1, MON2)

ADFIX (BIT)

ADEN (BIT)

MPEN (BIT)

APEN (BIT)

INV2 (BIT)

INV1 (BIT)

RHIZ

RESISTOR 0

50kΩ FULL SCALE

256 POSITIONS

RHIZ

RESISTOR 1

50kΩ FULL SCALE

256 POSITIONS

Figure 1. DS1854 Block Diagram

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 21 22

Two Monitors 1

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