emc2105 Standard Microsystems Corp., emc2105 Datasheet - Page 57

• Manufacturer Part Number: emc2105
• Description: Emc2105 Rpm-based High Side Fan Controller With Hardware Thermal Shutdown
• Manufacturer: Standard Microsystems Corp.

ADDR
3Ch
3Dh
30h
31h
32h
33h
34h
35h
38h
39h
3Ah
3Bh
RPM-Based High Side Fan Controller with Hardware Thermal Shutdown
Datasheet
APPLICATION NOTE: If any of the External Diode 1, External Diode 2, External Diode 3 is configured to operate
SMSC EMC2105
6.17
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
The EMC2105 contains high limits for all temperature channels and voltage channels. If any
measurement meets or exceeds the high limit then the appropriate status bit is set and the ALERT#
pin are asserted (if enabled).
Additionally, the EMC2105 contains low limits for all temperature channels. If the temperature channel
drops below the low limit, then the appropriate status bit is set and the ALERT# pin are asserted (if
enabled).
All Limit Registers are Software Locked.
Limit Registers
External Diode
External Diode
External Diode
External Diode
External Diode
External Diode
External Diode
External Diode
Internal Diode
Internal Diode
1 High Limit
2 High Limit
3 High Limit
4 High Limit
1 Low Limit
2 Low Limit
3 Low Limit
4 Low Limit
REGISTER
VIN 4 Low
VIN4 High
High Limit
Low Limit
Limit
Limit
as a voltage input, then the corresponding temperature high and low limit registers are
compared against the measured voltage. The data format is the same as the measured
voltage and these registers should be updated accordingly.
752.9
752.9
Sign
Sign
Sign
Sign
Sign
Sign
Sign
Sign
Sign
Sign
B7
Table 6.22 Limit Registers
376.5
376.5
B6
64
64
64
64
64
64
64
64
64
64
DATASHEET
188.2
188.2
B5
32
32
32
32
32
32
32
32
32
32
57
94.12
94.12
B4
16
16
16
16
16
16
16
16
16
16
47.06
47.06
B3
8
8
8
8
8
8
8
8
8
8
23.53
23.53
B2
4
4
4
4
4
4
4
4
4
4
11.76
11.76
B1
2
2
2
2
2
2
2
2
2
2
Revision 1.74 (05-08-08)
5.88
5.88
B0
1
1
1
1
1
1
1
1
1
1
DEFAULT
(+85°C)
(+85°C)
(+85°C)
(+85°C)
(+85°C)
(0.8V)
(0°C)
(0°C)
(0°C)
(0°C)
(0°C)
(0V)
FFh
55h
55h
55h
55h
55h
00h
00h
00h
00h
00h
00h