Datasheet

16 Atmel AT30TS00 [Preliminary]
8585B−SEEPR−8/10
6.4. Upper Alarm Trip Register (16-bit Read/Write, Address = 02h)
The Upper Alarm Trip Register holds the user programmed upper temperature boundary trip point in 11-bit two’s
complement format (0.25°C resolution) that can be used to monitor ambient temperature in an operating window
(See Table 6-7 and Table 6-8). When the temperature increases above this trip point, or drops below or is equal
to the trip point (minus any hysteresis set), then the
EVENT
pin is asserted (if enabled). This register becomes read
only if the Alarm Window Lock bit (WINLOCK) bit 6 in the configuration register is set to a ‘1’.
Table 6-7. Upper Alarm Trip Register Bit Distribution
Bit 15 14 13 12 11 10 9 8
Symbol RFU SIGN ALMWINH
Default Value 0 0 0 0 0 0 0 0
R / W access R R R R/W R/W R/W R/W R/W
Bit 7 6 5 4 3 2 1 0
Symbol ALMWINH RFU
Default Value 0 0 0 0 0 0 0 0
R / W access R/W R/W R/W R/W R/W R/W R R
Table 6-8. Upper Alarm Trip Register Bit Description
Bit Symbol Description
15:13 RFU Reserved for future use. Read as ‘0’
12 SIGN Sign bit
0 = Ambient temperature is greater than or equal to 0°C
1= Ambient temperature is less than 0°C
11:2 ALMWINH Upper Alarm Trip temperature bits
Represented in two’s complement format
1:0 RFU Reserved for future use. Read as ‘0’