EMC6D103 datasheet(59/92 Pages) SMSC

59 / 92 page

Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features

Datasheet

SMSC EMC6D103

Revision 0.3 (03-01-07)

DATASHEET

8.2.7

The Company ID register contains the company identification number. This number is a method for

uniquely identifying the part manufacturer.

This register is read only – a write to this register has no effect.

8.2.8

The four least significant bits of the Version / Stepping register [3:0] contain the current stepping of the

EMC6D103 silicon. Stepping numbers are to begin from a value of 08h, to indicate that the register

set is enhanced from previous hardware monitoring standards. The four most significant bits [7:4]

reflect the version number, which will be fixed at 0110b. For the A0 stepping of this device, the register

will read 01101000b. For the A1 stepping, this register will read 01101001b.

The register is used by application software to identify which device has been implemented in the given

system. Based on this information, software can determine which registers to read from and write to.

Further, application software may use the current stepping to implement work-arounds for bugs found

in a specific silicon stepping. This register is read only – a write to this register has no effect.

8.2.9

Setting the Lock bit makes the Lock bit read only.

Table 8.11 Register 3Eh: Company ID

Address

Read/

Write

Bit 7

(MSb)

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

(LSb)

Default

Value

3Eh

Company ID

5Ch

Table 8.12 Register 3Fh: Version / Stepping

Address

Read/

Write

Bit 7

(MSb)

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

(LSb)

Default

Value

3Fh

Version / Stepping

VER3

VER

STP

STP0

68h

Table 8.13 Register 40h: Ready/Lock/Start Monitoring

Address

Read/

Write

Bit 7

(MSb)

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

(LSb)

Default

Value

40h

R/W

Ready/Lock/Start

RES

OVRID

READY

LOCK

START

00h

EMC6D103 Datasheet(PDF) 59 Page - SMSC Corporation

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