Target Datasheet TLE7230 R/G

V1.1

Page

12. Oct. 2003

12

mand was valid the rising edge of CS will reset all diagnosis registers and restart the fault filtering time.

In case of an invalid command the device will ignore the data bits and the diagnosis register will not be

reset at the rising CS edge.

Figure 1: Two bits per channel diagnostic feedback

Diagnostic Serial Data O ut SO

HH

Norm al function

HL

O verload , Shorted Load or O vertemperature

LH

O pen Load (off)

LL

Short to G ND

15

3

2

1

0

MSB

Ch.2

Ch.1

LSB

Ch.8

For Full Diagnosis there are two diagnostic bits per channel configured as shown in Figure 1.

Normal function: The bit combination HH indicates that there is no fault condition, i.e. normal function.

Overload, Shorted Load or Overtemperature: HL is set when the current limitation gets active, i.e.

there is a overload, short to supply or overtemperature condition. The second reason for this bit combi-

nation is overtemperature of the corresponding channel.

Open load: LH is set when open load is detected (in off state of the channel)

Short to GND : LL is set when this condition is detected (in off state)

Timing Figures

Figure 5: Power Outputs

t

t

80%

20%