EMC6D103S-CZC SMSC, EMC6D103S-CZC Datasheet - Page 64

• Manufacturer Part Number: EMC6D103S-CZC
• Description: Industrial Temperature Sensors Auto Fan Contrllr Up to 4 Fans
• Manufacturer: SMSC

Specifications of EMC6D103S-CZC

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Revision 0.3 (03-01-07)
8.2.13
INPUT
Register
Address
Vccp
2.5V
VCC
12V
5V
4Ch
4Dh
44h
45h
46h
47h
48h
49h
4Ah
4Bh
VOLTAGE
NOMINAL
2.25V
12.0V
2.5V
3.3V
5.0V
/Write
Read
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Software uses the information in this register to determine the voltage that the processor is designed
to operate at. With this information, software can then dynamically determine the correct values to
place in the Vccp Low Limit and Vccp High Limit registers.
This register is read only – a write to this register has no effect.
Registers 44-4Dh: Voltage Limit Registers
Setting the Lock bit has no effect on these registers.
If a voltage input either exceeds the value set in the voltage high limit register or falls below or equals
the value set in the voltage low limit register, the corresponding bit will be set automatically by the
EMC6D103 in the interrupt status registers (41-42h). Voltages are presented in the registers at ¾ full
scale for the nominal voltage, meaning that at nominal voltage, each input will be C0h, as shown in
Table
8.21.
SETTING AT
REGISTER
VOLTAGE
NOMINAL
Register Name
Vccp High Limit
2.5V High Limit
VCC High Limit
Vccp Low Limit
VCC Low Limit
2.5V Low Limit
12V High Limit
12V Low Limit
5V High Limit
C0h
C0h
C0h
C0h
C0h
5V Low Limit
Table 8.20 Registers 44-4Dh: Voltage Limit Registers
Table 8.21 Voltage Limits vs. Register Setting
Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features
MAXIMUM
VOLTAGE
16.00V
3.32V
3.00V
4.38V
6.64V
DATASHEET
(MSb)
Bit 7
7
7
7
7
7
7
7
7
7
7
64
Bit 6
6
6
6
6
6
6
6
6
6
6
SETTING AT
REGISTER
MAXIMUM
VOLTAGE
Bit 5
FFh
FFh
FFh
FFh
FFh
5
5
5
5
5
5
5
5
5
5
Bit 4
4
4
4
4
4
4
4
4
4
4
Bit 3
VOLTAGE
3
3
3
3
3
3
3
3
3
3
MINIMUM
0V
0V
0V
0V
0V
Bit 2
2
2
2
2
2
2
2
2
2
2
Bit 1
MINIMUM VOLTAGE
1
1
1
1
1
1
1
1
1
1
SETTING AT
REGISTER
SMSC EMC6D103
(LSb)
Bit 0
0
0
0
0
0
0
0
0
0
0
00h
00h
00h
00h
00h
Datasheet
Default
Value
00h
FFh
00h
FFh
00h
FFh
00h
FFh
00h
FFh