EMC2302 datasheet(39/44 Pages) SMSC

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Dual RPM-Based PWM Fan Controller

Datasheet

SMSC EMC2302

Revision 1.1 (10-12-09)

DATASHEET

5.19

Software Lock Register

The Software Lock Register controls the software locking of critical registers. This register is software

locked.

Bit 0 - LOCK - this bit acts on all registers that are designated SWL. When this bit is set, the locked

registers become read only and cannot be updated.

‘0’ (default) - all SWL registers can be updated normally.

‘1’ - all SWL registers cannot be updated and a hard-reset is required to unlock them.

5.20

Product ID Register

The Product ID Register contains a unique 8-bit word that identifies the product.

5.21

Manufacturer ID Register

The Manufacturer ID Register contains an 8-bit word that identifies SMSC.

5.22

Revision Register

The Revision Register contains an 8-bit word that identifies the die revision.

Table 5.29 Software Lock Register

ADDR

R/W

DEFAULT

EFh

R/W

Software

Lock

LOCK

00h

Table 5.30 Product ID Register

ADDR

R/W

DEFAULT

FDh

Product ID

36h

Table 5.31 Manufacturer ID Register

ADDR

R/W

DEFAULT

FEh

Manufacturer ID

5Dh

Table 5.32 Revision Register

ADDR

R/W

DEFAULT

FFh

Revision

80h

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