EMC2305-1-AP-TR SMSC, EMC2305-1-AP-TR Datasheet - Page 31

• Manufacturer Part Number: EMC2305-1-AP-TR
• Description: Industrial Temperature Sensors Penta RPM-Based PWN Fan Speed Controller
• Manufacturer: SMSC

Specifications of EMC2305-1-AP-TR

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

ADDR
20h
Multiple RPM-Based PWM Fan Controller for Five Fans
Datasheet
SMSC EMC2305
5.1.1
5.2
ADDR
FCh
FDh
FEh
FFh
EF
R/W
R/W
R/W
R/W
Configuration
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 EMC2305. The bits are described
below. The Configuration Register is software locked.
Bit 7 - MASK - Blocks the ALERT# pin from being asserted.
Bit 6 - DIS_TO - Disables the SMBus timeout function for the SMBus client (if enabled).
Bit 5 - WD_EN - Enables the Watchdog timer to operate in Continuous Mode (see
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.
‘0’ - The SMBus timeout function is enabled.
‘1’ (default) - The SMBus timeout function is disabled allowing the device to be fully I
‘0’ (default) - The Watchdog timer does not operate continuously. It will function upon power up and
at no other time.
‘1’ - The Watchdog timer operates continuously as described in
Product Features
Manufacturer ID
Software Lock
REGISTER
Product ID
Revision
NAME
MASK
B7
Table 5.1 EMC2305 Register Set (continued)
DIS_TO
device power up by external pin states
B6
Table 5.2 Configuration Register
Indicates functions determined upon
Stores the unique Product ID
Stores the Manufacturer ID
Locks all SWL registers
Revision Registers
WD_EN
DATASHEET
Lock Register
B5
FUNCTION
Revision
31
B4
-
B3
-
B2
Section
DEFAULT
-
VALUE
5Dh
00h
00h
34h
80h
DR_EXT_
4.8.
CLK
B1
Revision 1.2 (03-22-10)
LOCK
SWL
No
No
No
No
Section
2
C compliant.
USE_
EXT_
CLK
B0
4.8.2).
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DEFAULT
40h