Datasheet

 2015-2017 Microchip Technology Inc. DS20005426C-page 31
MCP9600
5.3 Temperature Alert Registers
This device provides four Temperature Alert registers
that are individually configured, which allow users to
monitor multiple temperature zones with a single
device. The following sections describe each alert
feature in detail.
5.3.1 ALERT LIMIT REGISTERS
This device integrates four individually controlled
Temperature Alert Limit registers. Each alert limit is
individually set to detect a rising or falling temperature,
or either the Thermocouple Temperature (T
H
) register
or the Cold-Junction (T
C
) register. The corresponding
alert limit outputs can also be enabled for temperature
status indicators. All alert functions are configured using
the Alert Limit Configuration registers (Register 5-11)
and the alert output hysteresis function is set using the
Alert Hysteresis registers (Register 5-10).
TABLE 5-4: ALERT LIMIT REGISTERS
Register Register Pointer
Alert 1 Limit – T
ALERT1
0001 0000
Alert 2 Limit – T
ALERT2
0001 0001
Alert 3 Limit – T
ALERT3
0001 0010
Alert 4 Limit – T
ALERT4
0001 0011
REGISTER 5-9: ALERT LIMITS 1, 2, 3 AND 4 REGISTERS
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
SIGN 1024°C 512°C 255°C 128°C 64°C 32°C 16°C
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0
8°C 4°C 2°C 1°C 0.5°C 0.25°C — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 SIGN: Sign bit
1 =T
A
 0°C
0 =T
A
0°C
bit 14-2 Alert 1, 2, 3 and 4: Data in Two’s Complement Format bits
bit 1-0 Unimplemented: Read as ‘0’