STP16DPS05XTTR datasheet(17/34 Pages) STMICROELECTRONICS

Nome de Peças	STP16DPS05XTTR

Descrição Electrónicos	Low voltage 16-bit constant current LED Sink driver with outputs error detection

PDF	34 Pages

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Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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17 / 34 page

STP16DPS05

Detection mode functionality

Doc ID 16538 Rev 2

17/34

7.2

Phase two: “error detection”

The 16 data bits must be set “1” in order to set ON all the outputs during the detection. The

data are latched by LE/DM1 and after that the outputs are ready for the detection process.

When the microcontroller switches the OE/DM2 to LOW, the device drives the LEDs in order

to analyze if an OPEN or SHORT condition has occurred.

The LEDs status will be detected at least in 1 microsecond and after this time the

microcontroller sets OE/DM2 in HIGH state and the output data detection result will go to

the microprocessor via SDO.

Detection mode and normal mode use both the same format data. As soon as all the

detection data bits are available on the serial line, the device may go back to normal mode

of operation. To re-detect the status the device must go back in normal mode and re-

entering in error detection mode.

Figure 15.

Detection diagram

STP16DPS05XTTR Folha de dados(PDF) 17 Page - STMicroelectronics