Rainbow-electronics DS1854 Manual do Utilizador descarregar pdf (Página 13)

DS1854

Dual Temperature-Controlled Resistors with

Two Monitors

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MEMORY

LOCATION

EEPROM/

SRAM

R/W

DEFAULT

SETTING

NAME OF LOCATION

FUNCTION

1C to 5F EEPROM 00 Reserved —

60 to 61 SRAM R —

Measured TMP

(MSB to LSB)

Digitized measured value for temperature.

See Table 1.

62 to 63 SRAM R —

Measured V

(MSB to LSB)

Digitized measured value for V

See Table 1.

64 to 65 SRAM R —

Measured MON1

(MSB to LSB)

Digitized measured value for MON1.

See Table 1.

66 to 67 SRAM R —

Measured MON2

(MSB to LSB)

Digitized measured value for MON2.

See Table 1.

68 to 6D SRAM R — Reserved —

6E SRAM — Logic states —

Bit 7 — R X HIZSTA

Resistor status bit. A high indicates that both

resistors are in high-impedance mode. A low

indicates that both resistors are operating

normally.

6—

R/W

0 HIZCO

Resistor control bit. Setting this bit high

causes both resistors to go into a high-

impedance state.

5— X X —

4— X X —

3— X X —

2—RX TXF

This status bit is high when OUT1 is high

assuming there is an external pullup resistor

on OUT1.

1—RX RXL

This status bit is high when OUT2 is high

assuming there is an external pullup resistor

on OUT2.

0—RX RDYB

This status bit goes high when V

has fallen

below the POA level.

6F SRAM — — Conversion updates —

Bit 7 —

R/W

0 TAU

This bit goes high after a temperature and

address update has occurred for the

corresponding measurement in bytes 60h to

61h. This bit can be written to a 0 by the user

and monitored to verify that a conversion has

occurred.

Main Device (continued)

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 21 22

Two Monitors 1

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