Rainbow-electronics DS1859 Bedienungsanleitung PDF herunterladen (Seite 19)

DS1859

Dual, Temperature-Controlled Resistors with

Internally Calibrated Monitors

____________________________________________________________________ 19

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 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 is a test mode setting and provides manual

control of the temperature index (Table 01, address 81h).

81 SRAM R —

Temperature

index

This byte is the temperature-calculated index used to

select the address of resistor settings in the look-up

tables (Tables 02 and 03, addresses 80h through C7h).

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

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

84 to 87 SRAM — — Reserved —

88 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 —

89 EEPROM R/W Configuration —

Bit 7 — — 0 X —

6——0 X

Table 01h

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 27 28

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