OUTn

SGn

VDD

V

DS(SG)

diagnosis .emf

protective functions

CLn

Tn

OR

SPI

MUX

00

01

10

OLn

CHn

OUTn

STA.

gate control

Pn

GND

SPI Driver for Enhanced Relay Control

SPIDER - TLE7232GS

Block Description and Electrical Characteristics

Data Sheet

20

Rev. 1.0, 2007-12-18

5.3

Diagnostic Features

The SPI of SPIDER - TLE7232GS provides diagnosis information about the device and about the load. There are

following diagnosis flags implemented:

•

The diagnosis information of the protective functions (flags CLn and Tn) of channel n is latched in the diagnosis

flag Pn.

•

The open load diagnosis of channel n is latched in the diagnosis flag OLn.

•

The short to GND monitor information of channel n is latched in the diagnosis flag SGn.

All flags are cleared after a successful SPI transmission.

There is an output state monitor implemented in the device that indicates the switch state of the device in register

STA. Depending on the voltage level at input pin and protective functions the bits are high or low.

Please see Figure 9 for details:

Figure 9

Block Diagram Diagnosis