Table 8.1 Register Summary (continued)
Reg
Read
Bit 7
Bit 0
LSb
0
STP0
START
Default
Value
5Ch
6Ah
00h
Reg Name
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Lock
Start
Addr
/Write
MSb
7
3Eh
3Fh
40h
R
R
Company ID
Version / Stepping
Ready/Lock/Start
6
5
4
3
2
1
No
No
Yes
No
No
No
VER3
RES
VER2
RES
VER1
RES
VER0
RES
STP3
OVRID READY
STP2
STP1
LOCK
R/W
Note 8.2
R-C
Note 8.3
R-C
Note 8.2
41h
42h
Interrupt Status Register 1
Interrupt Status Register 2
INT2
D2
AMB
D1
5V
VCC
Vccp
RES
2.5V
12V
00h
00h
No
No
No
ERR2
ERR1
TACH4
TACH3
TACH2
TACH1
No
Note 8.3
R
43h
44h
45h
46h
47h
48h
49h
4Ah
4Bh
4Ch
4Dh
4Eh
4Fh
50h
51h
52h
53h
54h
55h
56h
57h
58h
59h
5Ah
5Bh
VID0-4
2.5V Low Limit
2.5V High Limit
Vccp Low Limit
Vccp High Limit
VCC Low Limit
VCC High Limit
5V Low Limit
RES
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
15
7
15
7
15
7
RES
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
14
6
14
6
14
6
RES
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
13
5
13
5
13
5
VID4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
12
4
12
4
12
4
VID3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
11
3
11
3
11
3
VID2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
10
2
10
2
10
2
VID1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
9
1
9
1
9
1
9
VID0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
8
0
8
0
8
0
8
N/A
00h
FFh
00h
FFh
00h
FFh
00h
FFh
00h
FFh
81h
7Fh
81h
7Fh
81h
7Fh
FFh
FFh
FFh
FFh
FFh
FFh
FFh
FFh
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
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
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
5V High Limit
12V Low Limit
12V High Limit
Remote Diode 1 Low Temp
Remote Diode 1 High Temp
Internal Low Temp
Internal High Temp
Remote Diode 2 Low Temp
Remote Diode 2 High Temp
Tach1 Minimum LSB
Tach1 Minimum MSB
Tach2 Minimum LSB
Tach2 Minimum MSB
Tach3 Minimum LSB
Tach3 Minimum MSB
Tach4 Minimum LSB
Tach4 Minimum MSB
15
14
13
12
11
10
SMSC [ SMSC CORPORATION ]
