sx8744emstrt Semtech Corporation, sx8744emstrt Datasheet - Page 17

• Manufacturer Part Number: sx8744emstrt
• Description: Precision Diode Digital Temperature For Up To 3 External Sensors
• Manufacturer: Semtech Corporation

ACS Revision 2.91/February 2010
©2010 Semtech Corp.
ADVANCED COMMUNICATIONS & SENSING
Bits
Bits
Bits
Bits
Bits
Bits
Bits
7:6
5:0
7:0
7:4
7:0
7:0
3:2
1:0
7:4
3:0
3
2
1
0
7
6
5
4
AlarmPolarity
Hysteresis2
Hysteresis1
Threshold1
Threshold2
Direction2
Direction1
Reserved
Reserved
Reserved
ExtOffset
ExtGain
SelExt3
SelExt2
SelExt1
Select2
Select1
Name
Name
Name
Name
Name
Name
Name
SelInt
Mode
Mode
Mode
Mode
Mode
Mode
Mode
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
01000000
01000000
xxxxxxxx
xxxxxx
Reset
Reset
Reset
Reset
Reset
Reset
Reset
0000
0100
0100
00
00
11
0
0
0
1
0
0
0
0
Addr: 0x26 RegAlarmHyst
Addr: 0x07 RegExtOffset
Addr: 0x25 RegAlarmSet
Addr: 0x06 RegExtGain
Addr: 0x22 RegSensor
Addr: 0x23 RegAlarm1
Addr: 0x24 RegAlarm2
Description
Write to 00
Gain adjustement for external temperature measurement
Do not write to avoid production calibration altering
Description
Offset adjustement for external temperature measurement.
Do not write to avoid production calibration altering
Description
Write to 0000
0: External sensor 3 not in temp. scan sequence
1: Enable external sensor 3 to be in temp. scan sequence
0: External sensor 2 not in temp. scan sequence
1: Enable external sensor 2 to be in temp. scan sequence
0: External sensor 1 not in temp. scan sequence
1: Enable external sensor 1 to be in temp. scan sequence
0: Internal sensor not in temp. scan sequence
1: Enable internal sensor to be in temp. scan sequence
Description
Alarm1 temperature threshold. The data is coherent with the binary and offset format.
1LSB=1
Description
Alarm2 temperature threshold. The data is coherent with the binary and offset format.
1LSB=1
Description
Write to 0
0: Alarm1, Alarm2 outputs active high
1: Alarm1, Alarm2 outputs active low
0: Trigger on over-temperature for Alarm2
1: Trigger on under-temperature for Alarm2
0: Trigger on over-temperature for Alarm1
1: Trigger on under-temperature for Alarm1
00: External 1 sensor controls Alarm2
01: External 2 sensor controls Alarm2
10: External 3 sensor controls Alarm2
11: Internal sensor controls Alarm2
00: External 1 sensor controls Alarm1
01: External 2 sensor controls Alarm1
10: External 3 sensor controls Alarm1
11: Internal sensor controls Alarm1
Description
Defines Alarm2 hysteresis with 1ºC resolution. (0 to 15ºC)
Defines Alarm1 hysteresis with 1ºC resolution. (0 to 15ºC)
Page 17
ºC
ºC
SX8733/SX8743/SX8744
Precision Diode Digital Temperature
For Up To 3 External Sensors
www.semtech.com
DATASHEET