EMC2300-AZC-TR SMSC, EMC2300-AZC-TR Datasheet - Page 72

• 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

Revision 0.32 (06-23-08)
8.2.26
8.2.27
Register
Address
Register
Address
85h
86h
88h
90h
91h
92h
93h
Read/
Write
Read/
Write
R/W
R/W
R/W
R/W
R
R
R
Registers 85h-88h: A/D Converter LSbs Registers
There is a 10-bit Analog to Digital Converter (ADC) located in the hardware monitoring block that
converts the measured voltages into 10-bit reading values. Depending on the averaging scheme
enabled, the hardware monitor may take multiple readings and average them to create the values
stored in the reading registers (i.e., 16x averaging, 32x averaging, etc.) The 8 MSb’s of the reading
values are placed in the Reading Registers. When the upper 8-bits located in the reading registers
are read the 4 LSb’s are latched into their respective bits in the A/D Converter LSbs Register. This
give 12-bits of resolution with a minimum value of 1/16
-127.9375 ºC < Temp < 127.9375 ºC and Voltage Range: 0 < Voltage < 256.9375) . See the DC
Characteristics for the accuracy of the reading values.
The eight most significant bits of the 12-bit averaged readings are stored in Reading registers and
compared with Limit registers. The Interrupt Status Register bits are asserted if the corresponding
measured value(s) on the inputs violate their programmed limits.
Registers 90h-93h: TachX Option Registers
These registers become read only when the Lock bit is set. Any further attempts to write to these
registers shall have no effect.
A/D Converter LSbs Reg 1
A/D Converter LSbs Reg 2
A/D Converter LSbs Reg 4
Register Name
Tach1 Option
Tach2 Option
Tach3 Option
Tach4 Option
Table 8.51 Registers 85h-88h: A/D Converter LSbs Registers
Register
Name
(MSb)
Bit 7
VCC.3
(MSb)
RD2.3
Bit 7
RES
DATASHEET
RESERVED
RESERVED
RESERVED
RESERVED
Bit 6
VCC.2
RD2.2
Bit 6
RES
72
Fan Control Device with High Frequency PWM and Temperature Monitors
VCC.1
RD2.1
Bit 5
Bit 5
RES
th
VCC.0
RD2.0
3EDG
3EDG
3EDG
3EDG
Bit 4
Bit 4
RES
per unit measured. (i.e., Temperature Range:
MODE
MODE
MODE
MODE
RD1.3
VCP.3
AM.3
Bit 3
Bit 3
RD1.2
VCP.2
EDG1
EDG1
EDG1
EDG1
AM.2
Bit 2
Bit 2
RD1.1
VCP.1
EDG0
EDG0
EDG0
EDG0
AM.1
Bit 1
Bit 1
RD1.0
VCP.0
SLOW
SLOW
SLOW
SLOW
(LSb)
(LSb)
SMSC EMC2300
AM.0
Bit 0
Bit 0
Datasheet
Default
Default
Value
Value
N/A
N/A
N/A
04h
04h
04h
04h