Datasheet

19
AT30TSE004A [DATASHEET]
Atmel-8868C-DTS-AT30TSE004A-Datasheet_122013
6.2.5 Lower Limit Register (16-bit Read/Write, Address = 03h)
The Lower Limit Register holds the user programmed lower temperature boundary trip point in 2’s complement
format (0.125C resolution) that can be utilized to monitor the temperature in an operating window (see
Table 6-7 and Table 6-9). When the temperature decreases below this trip point minus any hysteresis set or
increases to meet or exceed this trip point, then the EVENT pin is asserted (if enabled).
This register becomes read-only if the Alarm Window Lock (WINLOCK) bit six in the Configuration Register is
set to a Logic 1.
Table 6-9. Lower Limit Register Bit Distribution
Table 6-10. Lower Limit Register Bit Description
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
Symbol RFU SIGN ALMWINL
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 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Symbol ALMWINL 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 Logic 0.
12 SIGN
Sign bit:
0 = The temperature is greater than or equal to 0°C.
1 = The temperature is less than 0°C.
11:2 ALMWINL
Lower Limit temperature bits:
Represented in 2’s complement format.
Read-only access if Alarm Window is locked (Configuration Register bit 6 high).
R/W access if the Alarm Window is unlocked.
0:1 RFU Reserved for Future Use. Read as Logic 0.