AN3981 datasheet(31/54 Pages) STMICROELECTRONICS

Il numero della parte	AN3981

Spiegazioni elettronici	LED array drivers

PDF	54 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

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31 / 54 page

AN3981

STP24DP05

Doc ID 022217 Rev 1

31/54

For proper device operation, the entering sequence must be followed by a resuming

sequence as it is not possible to insert consecutive equal sequences.

Figure 36.

Example of error detection with the STP24DP05

Figure 36 shows an example of error detection where OUT15 and OUT0 are faulty, whereas

all other outputs are considered good.

4.6.3

Correctness of the error detection results

It is important to underline that the result of the diagnostic process must be compared with

the data loaded into the shift register.

In fact, if a channel is not switched on, the result of the detection is “0” anyway.

It is recommended to follow the approach shown in Figure 26.

Figure 34.

Digital key for entering error

detection mode in 32-bit LED

drivers

Figure 35.

Digital key for exiting error

detection mode in 32-bit LED

drivers

AN3981 Scheda tecnica(PDF) 31 Page - STMicroelectronics