Rainbow-electronics DS1858 Uživatelský manuál stáhnout pdf (Strana 16)

DS1858

Dual Temperature-Controlled Resistors with

Three Monitors

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.

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

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

84 to 87 SRAM — 00 Reserved —

EEPROM

R/W

Interrupt enable

This byte configures a maskable interrupt, determining

which event asserts a buffer 1 output (MINT set to 1, see

temperature, V

, MON1, MON2, or MON3 is desired to

generate an interrupt, the corresponding bits are set to 1.

If interrupt generation is not desired, set all bits to 0.

Bit 7 — — 1 TMP —

6——1 V

—

5——1 MON1 —

4——1 MON2 —

3——1 MON3 —

2——0 X —

1——0 X —

0——0 X —

EEPROM

R/W Configuration —

Bit 7 — — 0 X —

6——0 X

Table 01h

16 ____________________________________________________________________

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

Three Monitors 1

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