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L9929

Description of DIA_REG Bit7

5.8

Device Identifier and Revision Number

The IC's identifier is used for production test purposes and features plug & play functionality depending on the

systems software release. It is made up on a device-number and a revision number each one read-only acces-

sible via standardised instructions.

The Device number is defined once to allow indentification of different IC-Types by software.

The Revision number may be utilised to distinguish different states of hardware. The contents is divided into an

upper 4 bit field reserved to define revisions correspondending to specific softwarereleases. The lower 4 bit field

is utilised to indentify the actual maskset.

Both (SWR and MSR) will start with 0000b and are increased by 1 every time an according modification of the

hardware is introduced.

5.9

Reading the IC Identifier (SPI Instruction: RD_IDENT):

5.10 Reading the IC revision number (SPI Instruction: RD_VERSION):

Encoding of the Diagnostic Bits of the Output-Stages OUT1 and OUT2

DIA21

DIA20

DIA11

DIA10

-

-

0

0

Short circuit over load (SCOL)

-

-

0

1

Short circuit to battery on OUT1 (SCB1)

-

-

1

0

Short circuit to ground on OUT1 (SCG1)

-

-

1

1

No error detected on OUT1

0

0

-

-

Open load

0

1

-

-

Short circuit to battery on OUT2 (SCB2)

1

0

-

-

Short circuit to ground on OUT2 (SCG2)

1

1

-

-

No error detected on OUT2

0

0

0

0

EN

DI

DIA_REG Bit7

00

0

01

0

10

1

11

0

IC Identifier1 (Device ID)

765432

10

ID7

ID6

ID5

ID4

ID3

ID2

ID1

ID0

Bit

Name

Description

7...0

ID(7...0)

ID-No.: 1010 0001

IC’s revision number

765432

10

SWR3

SWR2

SWR1

SWR0

MSR3

MSR2

MSR1

MSR0

Bit

Name

Description

7...4

SWR(3...0)

Revision corresponding to Software release: 0Hex

3...0

MSR(3...0)

Revision corresponding to Maskset: 8Hex