Rainbow-electronics DS1857 Bedienungsanleitung PDF herunterladen (Seite 13)

DS1857

Dual Temperature-Controlled Resistors with

External Temperature Input and Monitors

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MEMORY

LOCATION

(hex)

EEPROM/

SRAM

R/W

DEFAULT

SETTING

(hex)

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——X X —

1——X X —

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

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