EMC6D100-DK SMSC [SMSC Corporation], EMC6D100-DK Datasheet - Page 41

• Manufacturer Part Number: EMC6D100-DK
• Description: ENVIRONMENTAL MONITORING AND CONTROL DEVICE WITH AUTOMATIC FAN CAPABILITY
• Manufacturer: SMSC [SMSC Corporation]

Environmental Monitoring and Control Device
Datasheet
8.5
SMSC EMC6D100/EMC6D101
REGISTER
REGISTER
ADDRESS
ADDRESS
22h
23h
24h
70h
71h
72h
25h
26h
27h
INPUT
Vccp
VCC
1.8V
2.5V
3.3V
12V
1.5V
5V
Note: registers 70h-72h are only applicable to the EMC6D100.
The Voltage Reading registers reflect the current voltage of the EMC6D100/EMC6D101 voltage monitoring
inputs. 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 EMC6D100/EMC6D101 Chip with a
minimum 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.
Processor (Zone1) Temp register reports the temperature measured by the Remote1- and Remote1+ pins,
Remote (Zone3) Temp register reports the temperature measured by the Remote2- and Remote2+ pins
and the Internal (Zone2) Temp 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 Table 8.2. The Temperature 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 Temperature Reading registers will be updated
automatically by the EMC6D100/EMC6D101 Chip with a minimum frequency of 4Hz. These registers are
read only – a write to these registers has no effect.
WRITE
WRITE
READ/
READ/
R
R
R
R
R
R
R
R
R
VOLTAGE
NOMINAL
2.25V
12.0V
1.5V
1.8V
2.5V
3.3V
3.3V
5.0V
(Zone1) Temp
(Zone2) Temp
(Zone3) Temp
REGISTER
REGISTER
Processor
Remote
Internal
+3.3V
+1.5V
+1.8V
NAME
NAME
3.3V
12V
5V
READING AT
REGISTER
VOLTAGE
NOMINAL
Table 8.1 - Voltage vs. Register Reading
C0h
C0h
C0h
C0h
C0h
C0h
C0h
C0h
(MSB)
(MSB)
BIT 7
BIT 7
DATASHEET
7
7
7
7
7
7
7
7
7
BIT 6
BIT 6
MAXIMUM
VOLTAGE
6
6
6
6
6
6
6
6
6
16.00V
1.99V
2.39V
3.32V
3.00V
4.38V
4.38V
6.64V
Page 41
BIT 5
BIT 5
5
5
5
5
5
5
5
5
5
BIT 4
BIT 4
READING AT
4
4
4
4
4
4
4
4
4
REGISTER
MAXIMUM
VOLTAGE
FFh
FFh
FFh
FFh
FFh
FFh
FFh
FFh
BIT 3
BIT 3
3
3
3
3
3
3
3
3
3
BIT 2
BIT 2
2
2
2
2
2
2
2
2
2
VOLTAGE
MINIMUM
BIT 1
0V
0V
0V
0V
0V
0V
0V
0V
BIT 1
1
1
1
1
1
1
1
1
1
(LSB)
(LSB)
BIT 0
BIT 0
0
0
0
0
0
0
0
0
0
READING AT
REGISTER
VOLTAGE
MINIMUM
Rev. 09-09-04
00h
00h
00h
00h
00h
00h
00h
00h
DEFAULT
DEFAULT
VALUE
VALUE
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A