Data Sheet TLE 6232 GP

V2.3

Page

2009-11-18

14

Description of the SPI Registers

(SPI Instructions: RD_DIAG)

Register:

DIAG_REG1

7

6

5

4

3

2

1

0

ST7

ST6

ST5

ST4

ST3

ST2

ST1

ST0

State of

Reset:

FFH

Access by

Controller:

Read only

Bit

Name

Description

7-6

DIA4

Diagnostic Bits of power stage 4

5-4

DIA3

Diagnostic Bits of power stage 3

3-2

DIA2

Diagnostic Bits of power stage 2

1-0

DIA1

Diagnostic Bits of power stage 1

Note:

This byte is always clocked out (second SO-byte), except the SI control words says:

RD_SCON or RD_MUX. But: The content of the fault register will only be deleted if the control command

’RD_DIAG’ was clocked in and 16 clock pulses were counted.

Register:

DIA_REG2

7

6

5

4

3

2

1

0

Z

Z

F

OT

ST11

ST10

ST9

ST8

State of

Reset:

FFH

Access by

Controller:

Read only

Bit

Name

Description

7-6

Z

Bit 7 and 6 are always tri-state

5

F

Common error flag

4

OT

Common over-temperature flag

3-2

DIA6

Diagnostic Bits of power stage 6

1-0

DIA5

Diagnostic Bits of power stage 5

Encoding of the Diagnostic (Status) Bits of the Power Stages

ST(2*x-1)

ST(2*x-2)

State of power stage x

x = 1..6

1

1

Power stage o.k.

1

0

Overload, short circuit to battery (SCB) or over-temperature (OT)

0

1

Open load (OL)

0

0

Short circuit to ground (SCG)

Note:

DIA_REG2 is always clocked out as first byte

F, OT Bit = 1: No Fault

F, OT Bit = 0: Fault, Over-temperature

The over-temperature bit is the latched result of an OR-operation out of the 6 signals of

the temperature sensor)

The general fault bit shows the fault occurrence at any of the outputs.

Reset of the Diagnostic Information

The diagnostic information will only be reset after the RD_DIAG command on the rising edge

of slave select or a reset signal is applied (RESET = low).