Rainbow-electronics DS1858 Manual do Utilizador descarregar pdf (Página 13)

DS1858

Dual Temperature-Controlled Resistors with

Three Monitors

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MEMORY

LOCATION

(hex)

EEPROM/

SRAM

R/W

DEFAULT

SETTING

(hex)

NAME OF LOCATION

FUNCTION

20 to 21 EEPROM

R/W

00

MON3limhi (MSB to LSB)

Contains upper limit settings for MON3. If the

limit is violated, a flag in Main Device byte 71h

is set.

22 to 23 EEPROM

R/W

00

MON3limhi (MSB to LSB)

Contains lower limit settings for MON3. If the

limit is violated, a flag in Main Device byte 71h

is set.

24 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

CC

(MSB to LSB)

Digitized measured value for V

CC

.

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 69 SRAM R —

Measured MON3

(MSB to LSB)

Digitized measured value for MON3.

See Table 1.

6A 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 —

2—RX TXF

This status bit is high when OUT1 is high

assuming there is an external pullup resistor

on OUT1.

3——X X —

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

CC

has fallen

below the POA level.

Main Device (continued)

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

Three Monitors 1

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