EMC2105_09 Datasheet, PDF (45/89 Pages) SMSC Corporation – RPM-Based High Side Fan Controller with Hardware Thermal Shutdown

RPM-Based High Side Fan Controller with Hardware Thermal Shutdown
Datasheet
Table 6.1 EMC2105 Register Set (continued)
ADDR R/W
E6h
R
EF R/W
FCh
R
FDh
R
FEh
R
FFh
R
REGISTER
NAME
GPIO Status
Software Lock
Product Features
Product ID
Manufacturer ID
Revision
FUNCTION
Indicates change of state for inputs on
GPIO 1
Lock Register
Locks all SWL registers
Revision Registers
Stores information about which pin
controlled product features are set
Stores the unique Product ID
Stores the Manufacturer ID
Revision
DEFAULT
VALUE LOCK
00h
No
00h
SWL
00h
No
1Bh
No
5Dh
No
02h
No
PAGE
Page 72
Page 72
Page 72
Page 73
Page 73
Page 73
6.1.1
During Power-On-Reset (POR), the default values are stored in the registers. A POR is initiated when
power is first applied to the part and the voltage on the VDD supply surpasses the POR level as
specified in the electrical characteristics. Any reads to undefined registers will return 00h. Writes to
undefined registers will not have an effect.
Lock Entries
The Lock Column describes the locking mechanism, if any, used for individual registers. All SWL
registers are Software Locked and therefore made read-only when the LOCK bit is set.
6.2
Temperature Data Registers
ADDR
00h
01h
02h
03h
04h
R/W REGISTER
R
Internal Diode
High Byte
R
Internal Diode
Low Byte
External
Diode 1 High
R
Byte
VIN1
External
R Diode 1 Low
Byte
External
Diode 2 High
R
Byte
VIN2
Table 6.2 Temperature Data Registers
B7
B6
B5
B4
B3
B2
Sign 64
32
16
8
4
0.5 0.25 0.125
-
-
-
Sign 64
32
16
400 200 100
50
0.5 0.25 0.125
-
8
4
25
13.5
-
-
Sign 64
32
16
400 200 100
50
8
4
25
13.5
B1
B0 DEFAULT
2
1
00h
-
-
00h
2
1
00h
6.25 3.125
00h
-
-
00h
2
1
00h
6.25 3.125
00h
SMSC EMC2105
45
DATASHEET
Revision 1.78 (04-21-09)