EMC2303-1-KP-TR Standard Microsystems (SMSC), EMC2303-1-KP-TR Datasheet - Page 28

• Manufacturer Part Number: EMC2303-1-KP-TR
• Manufacturer: Standard Microsystems (SMSC)

Specifications of EMC2303-1-KP-TR

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 12
• Lead Free Status / RoHS Status: Compliant

ADDR
20h
Revision 1.2 (03-22-10)
5.1.1
5.2
ADDR
FCh
FDh
5Ch
5Dh
5Eh
5Fh
FEh
FFh
EF
R/W
R/W
R/W
R/W
R/W
R/W
Configuration
R
R
R
R
R
R
REGISTER
During Power-On-Reset (POR), the default values are stored in the registers. A POR is initiated when
power is first applied to the part and the voltage on the VDD supply surpasses the POR level as
specified in the electrical characteristics. Any reads to undefined registers will return 00h. Writes to
undefined registers will not have an effect.
Lock Entries
The Lock Column describes the locking mechanism, if any, used for individual registers. All SWL
registers are Software Locked and therefore made read-only when the LOCK bit is set.
The Configuration Register controls the basic functionality of the EMC2303. The bits are described
below. The Configuration Register is software locked.
Bit 7 - MASK - Blocks the ALERT# pin from being asserted.
Configuration Register
‘0’ (default) - The ALERT# pin is unmasked. If any bit in either status register is set, the ALERT#
pins will be asserted (unless individually masked via the Mask Register).
‘1’ - The ALERT# pin is masked and will not be asserted.
Product Features
TACH 3 Reading
TACH 3 Reading
Manufacturer ID
TACH 3 Target
TACH 3 Target
Software Lock
REGISTER
Product ID
High Byte
High Byte
Low Byte
Low Byte
Revision
NAME
MASK
B7
Table 5.1 EMC2303 Register Set (continued)
DIS_TO
Holds the target tachometer reading low
Holds the tachometer reading high byte
Holds the tachometer reading low byte
device power up by external pin states
B6
Table 5.2 Configuration Register
Holds the target tachometer reading
Indicates functions determined upon
Stores the unique Product ID
Stores the Manufacturer ID
Locks all SWL registers
Revision Registers
WD_EN
DATASHEET
high byte for Fan 3
Lock Register
B5
byte for Fan 3
FUNCTION
for Fan 3
for Fan 3
Revision
28
B4
-
Multiple RPM-Based PWM Fan Controller for Three Fans
B3
-
B2
DEFAULT
-
VALUE
5Dh
F8h
FFh
FFh
F8h
00h
00h
35h
80h
DR_EXT_
CLK
B1
LOCK
SWL
No
No
No
No
No
No
No
No
SMSC EMC2303
USE_
EXT_
CLK
B0
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Datasheet
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PAGE
DEFAULT
40h