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TLE6230GP Datasheet(PDF) 9 Page - Infineon Technologies AG |
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TLE6230GP Datasheet(HTML) 9 Page - Infineon Technologies AG |
9 / 16 page Data Sheet TLE 6230 GP V2.3 Page 18. Nov. 2009 9 high level at this pin (within the data byte) will switch on the power switch, provided that the corresponding parallel input is also switched on (AND-operation for channel 1 to 4). SO - Serial Output. Diagnostic data bits are shifted out serially at this pin, the most significant bit first. SO is in a high impedance state until the CS pin goes to a logic low state. New diag- nostic data will appear at the SO pin following the rising edge of SCLK. RESET - Reset pin. If the reset pin is in a logic low state, it clears the SPI shift register and switches all outputs OFF. An internal pull-up structure is provided on chip. Diagnostics FAULT - Fault pin. There is a general fault pin (open drain) which shows a high to low transi- tion as soon as an error occurs for any one of the eight channels. This fault indication can be used to generate a µC interrupt. Therefore a ‘diagnosis’ interrupt routine need only be called after this fault indication. This saves processor time compared to a cyclic reading of the SO information. As soon as a fault occurs, the fault information is latched into the diagnosis register. A new error will over-write the old error report. Serial data out pin (SO) is in a high impedance state when CS is high. If CS receives a LOW signal, all diagnosis bits can be shifted out serially. The rising edge of CS will reset all error registers. 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, Short Circuit to Battery (SCB) or Overtemperature: HL is set when the current limitation gets active, i.e. there is a overload, short to supply or overtemperature condition. Open load: An open load condition is detected when the drain voltage decreases below 3 V (typ.). LH bit combination is set. Short Circuit to GND: If a drain to ground short circuit exists and the drain to ground current exceeds 100 µA, short to ground is detected and the LL bit combination is set. Diagnostic Serial Data Out SO HH Normal function HL Overload, Shorted Load or Overtemperature LH Open Load LL Shorted to Ground Ch.8 Ch.7 Ch.6 Ch.5 15 14 13 12 11 10 9 8 - - - - - Figure 1: Two bits per channel diagnostic feedback |
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