Target Datasheet TLE7230 R/G

V1.1

Page

12. Oct. 2003

10

The input data consist of 16 bit, made up of x control bits and y data bits. The control word is used to

program the device, to operate it in a certain mode as well as providing diagnostic information (see SPI

Commands).

SO - Serial Output. Diagnostic data bits are shifted out serially at this pin, the most significant bit (MSB)

first. SO is in a high impedance state until the CS pin goes to a logic low state. New diagnostic data will

appear at the SO pin following the rising edge.

SPI Control and Commands:

MSB

14

13

12

11

10

9

8

7

6

5

4

3

2

1

LSB

SI:

CMD

x

x

x

ADDR

DATA

SO standard diagnosis

SO:

Ch 8

Ch 7

Ch 6

Ch 5

Ch 4

Ch 3

Ch 2

Ch 1

SO after read command in previous frame

SO:

0

1

0

0

0

ADDR

DATA

CMD

Command :

0 0 : Diagnosis Only :

Reads out the diagnosis register. This command has no other influence on the device.

0 1 : Read register :

With the next SO dataframe the content of the addressed register will be sent.

1 0 : Reset Registers

Sets back all internal registers. Logic registers to default and Fault registers to no error.

1 1 : Write register :

The data of the SI word will be written to the addressed register.

No valid Commands :

If the first 8 bit of the SI word contain no valid bit combination it will not lead to an reac-

tion (register value change, switching channels, ...) of the IC. After Chip Select giong

L H the diagnosis register will not be reset.

ADDR

Address :

Pointer to register for read and write command

DATA

Data:

Data written to or read from register selected by address ADDR

Ch x

Standard diagnosis for channel x:

Details see "SPI Diagnostics"