Datasheet

21
Atmel AT30TSE002B [DATASHEET]
8711G–SEEPR–5/12
11.6 Critical Alarm Trip Register (16-bit Read/Write, Address = 04h)
The Critical Alarm Trip Register holds the user programmed Critical Alarm temperature boundary trip point in
11-bit twos complement format (0.25°C resolution) that can be used to monitor ambient temperature (See Table 11-11
and Table 11-12). When the temperature increases above this trip point, the
EVENT pin will be asserted (if enabled). It
will remain asserted until temperature decreases below or equal to the trip point minus any hysteresis set. This register
becomes read only if the Critical Alarm Trip Lock Bit (CRTALML) bit seven in the configuration register is set to a one.
Table 11-11. Critical Alarm Trip Register Bit Distribution
Table 11-12. Critical Alarm Trip Register Bit Description
Bit 15 14 13 12 11 10 9 8
Symbol RFU SIGN CRITEVT
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 CRITEVT 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
Bit Symbol Description
15:13 RFU Reserved for Future Use. Read as zero.
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 CRITEVT
Critical Alarm Trip temperature bits:
Represented in two’s complement format.
0:1 RFU Reserved for Future Use. Read as zero.