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EMC2300 Datasheet(PDF) 45 Page - SMSC Corporation

Part No. EMC2300
Description  Fan Control Device with High Frequency PWM and Temperature Monitors
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Maker  SMSC [SMSC Corporation]
Homepage  http://www.smsc.com
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EMC2300 Datasheet(HTML) 45 Page - SMSC Corporation

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Chapter 8 Register Set
Definition for the Lock and Start columns:
Yes = Register is made read-only when the related bit is set; No = Register is not made read-only when the related bit is set.
Table 8.1 Register Summary
Reg
Addr
Read
/Write
Reg Name
Bit 7
MSb
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
LSb
Default
Value
Lock
Start
20h
R
Reserved
RES
RES
RES
RES
RES
RES
RES
RES
00h
No
No
21h
R
Vccp Reading
7
6
5
4
3
2
1
0
N/A
No
No
22h
R
VCC Reading
7
6
5
4
3
2
1
0
N/A
No
No
23h
R
Reserved
RES
RES
RES
RES
RES
RES
RES
RES
00h
No
No
24h
R
Reserved
RES
RES
RES
RES
RES
RES
RES
RES
00h
No
No
25h
R
Remote Diode 1 Temp Reading
7
6
5
4
3
2
1
0
N/A
No
No
26h
R
Internal Temp Reading
7
6
5
4
3
2
1
0
N/A
No
No
27h
R
Remote Diode 2 Temp Reading
7
6
5
4
3
2
1
0
N/A
No
No
28h
R
Tach1 LSB
7
6
5
4
3
2
1
0
N/A
No
No
29h
R
Tach1 MSB
15
14
13
12
11
10
9
8
N/A
No
No
2Ah
R
Tach2 LSB
7
6
5
4
3
2
1
0
N/A
No
No
2Bh
R
Tach2 MSB
15
14
13
12
11
10
9
8
N/A
No
No
2Ch
R
Tach3 LSB
7
6
5
4
3
2
1
0
N/A
No
No
2Dh
R
Tach3 MSB
15
14
13
12
11
10
9
8
N/A
No
No
2Eh
R
Tach4 LSB
7
6
5
4
3
2
1
0
N/A
No
No
2Fh
R
Tach4 MSB
15
14
13
12
11
10
9
8
N/A
No
No
30h
R/W
Note 8.1
PWM1 Current Duty Cycle
7
6
5
4
3
2
1
0
N/A
Yes
Note 8.1
No
31h
R/W
Note 8.1
PWM2 Current Duty Cycle
7
6
5
4
3
2
1
0
N/A
Yes
Note 8.1
No
32h
R/W
Note 8.1
PWM3 Current Duty Cycle
7
6
5
4
3
2
1
0
N/A
Yes
Note 8.1
No
3Eh
R
Company ID
7
6
5
4
3
2
1
0
5Ch
No
No
3Fh
R
Version / Stepping
VER3
VER2
VER1
VER0
STP3
STP2
STP1
STP0
6Ah
No
No
40h
R/W
Note 8.2
Ready/Lock/Start
RES
RES
RES
RES
OVRID
READY
LOCK
START
00h
Yes
Note 8.2
No


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