Rainbow-electronics DS1857 Instrukcja Użytkownika Pobierz pdf (Strona 16)

DS1857

Dual Temperature-Controlled Resistors with

External Temperature Input and Monitors

16 ____________________________________________________________________

MEMORY

LOCATION

(hex)

EEPROM/

SRAM

R/W

DEFAULT

SETTING

(hex)

NAME OF

LOCATION

FUNCTION

80 SRAM R/W Mode —

Bit 7 — — 0 X —

6——0 X —

5——0 X —

4——0 X —

3——0 X —

2——0 X —

1——1 TEN

If TEN = 0, the temperature conversions update and the

resistors can be controlled manually. The user sets the

resistor in manual mode by writing to addresses 82h and

83h in Table 01 to control resistors 0 and 1, respectively.

0——1 AEN

AEN = 0 provides manual control of the temperature

index.

81 SRAM R — Temp index

This byte is the temperature-calculated index used to

select the address of resistor settings in the look-up

tables.

SRAM R/W 00 Resistor 0 Resistor 0 position values from 00h to FFh.

SRAM R/W 00 Resistor 1 Resistor 1 position values from 00h to FFh.

84 to 87 SRAM — 00 Reserved —

EEPROM

R/W X X —

Bit 7 — — 1 TMP —

6——1 V

—

5——1 MON1 —

4——1 MON2 —

3——0 X —

2——0 X —

1——0 X —

0——0 X —

EEPROM

R/W — Configuration —

Bit 7 — — 0 X —

6——0 X —

Table 01h

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 22

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