Rainbow Electronics DS1859 - Manual (Page 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
register 89h in Table 01). If any combination of
temperature, V
CC , 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 CC —
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