EMC2300-AZC-TR SMSC, EMC2300-AZC-TR Datasheet - Page 49

• Manufacturer Part Number: EMC2300-AZC-TR
• Description: Industrial Temperature Sensors Auto Fan Contrllr Up to 4 Fans
• Manufacturer: SMSC

Specifications of EMC2300-AZC-TR

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

Fan Control Device with High Frequency PWM and Temperature Monitors
Datasheet
SMSC EMC2300
8.1
8.2
8.2.1
8.2.2
INPUT
Register
Address
Register
Address
Vccp
VCC
21h
22h
25h
26h
27h
NOMINAL
VOLTAGE
Undefined Registers
Defined Registers
2.25V
Read/
Read/
Write
Write
3.3V
The registers shown in
reads to undefined registers always return 00h. Writes to undefined registers have no effect and do
not return an error.
Registers 20-24h: Voltage Reading
The Voltage Reading registers reflect the current voltage of the
Voltages are presented in the registers at ¾ full scale for the nominal voltage, meaning that at nominal
voltage, each register will read C0h.
The Voltage Reading registers will be updated automatically by the
frequency of 4Hz. These registers are read only – a write to these registers has no effect.
Registers 25-27h: Temperature Reading
The Temperature Reading registers reflect the current temperatures of the internal and remote diodes.
Remote Diode 1 Temp Reading register reports the temperature measured by the Remote1- and
Remote1+ pins, Remote Diode 2 Temp Reading register reports the temperature measured by the
Remote2- and Remote2+ pins, and the Internal Temp Reading register reports the temperature
measured by the internal (ambient) temperature sensor. Current temperatures are represented as 8
bit, 2’s complement, signed numbers in Celsius, as shown below in
Reading register will return a value of 80h if the remote diode pins are not implemented by the board
designer or are not functioning properly (this corresponds to the diode fault interrupt status bits). The
R
R
R
R
R
Remote Diode 1 Temp Reading
Remote Diode 2 Temp Reading
READING AT
Internal Temp Reading
REGISTER
VOLTAGE
NOMINAL
Register Name
Register Name
Vccp Reading
VCC Reading
C0h
C0h
Table 8.4 Registers 25-27h: Temperature Reading
Table 8.2 Registers 20-24h: Voltage Reading
Table 8.1, "Register Summary"
Table 8.3 Voltage vs. Register Reading
MAXIMUM
VOLTAGE
3.00V
4.38V
DATASHEET
(MSb)
(MSb)
Bit 7
Bit 7
7
7
7
7
7
49
Bit 6
Bit 6
6
6
6
6
6
READING AT
REGISTER
MAXIMUM
VOLTAGE
FFh
FFh
Bit 5
Bit 5
5
5
5
5
5
above are the defined registers in the part. Any
Bit 4
Bit 4
4
4
4
4
4
EMC2300
Bit 3
Bit 3
VOLTAGE
MINIMUM
3
3
3
3
3
EMC2300
0V
0V
Bit 2
Bit 2
Table
2
2
2
2
2
voltage monitoring inputs.
8.5. The Temperature
MINIMUM VOLTAGE
Bit 1
Bit 1
Chip with a minimum
Revision 0.32 (06-23-08)
1
1
1
1
1
READING AT
REGISTER
(LSb)
(LSb)
Bit 0
Bit 0
0
0
0
0
0
00h
00h
Default
Default
Value
Value
N/A
N/A
N/A
N/A
N/A