Multiple RPM-Based PWM Fan Controller
Datasheet
Table 5.31 ADDR_SEL Pin Configuration
ADR[2:0]
SLAVE ADDRESS
2
0
0
0
0
1
1
1
0
0
1
1
0
0
0
0
1
0
1
0
1
0101_110(r/w)
0101_111(r/w)
0101_100(r/w)
0101_101(r/w)
1001_100(r/w)
1001_101(r/w)
Bits 2-0 - FAN_SPD[2:0] - Indicates the selected fan speed if the CLK pin pull-up decode is enabled
via the ADDR_SEL pin.
Table 5.32 FAN_SPD Pin Configuration
FAN_SPD [2:0]
FAN SPEED
2
0
0
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
0% Drive
30% Drive
50% Drive
75% Drive
100% Drive
5.21
Product ID Register
Table 5.33 Product ID Register
ADDR
FDh
R/W
R
REGISTER
Product ID
B7
0
B6
0
B5
1
B4
1
B3
0
B2
1
B1
0
B0
1
DEFAULT
35h
The Product ID Register contains a unique 8-bit word that identifies the product.
Revision 1.1 (10-12-09)
44
SMSC EMC2303
DATASHEET
SMSC [ SMSC CORPORATION ]
