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NCV7383DB0R2G Datasheet(PDF) 6 Page - ON Semiconductor |
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NCV7383DB0R2G Datasheet(HTML) 6 Page - ON Semiconductor |
6 / 21 page NCV7383 http://onsemi.com 6 Table 3. INTERNAL FLAGS Flag Comment Reset Condition Set Condition SPI Error SPI error is detected: Number of SCK falling edges while CSN is Low is different from 16 or SCK is not Low at CSN falling or rising edge CSN falling edge is detected or Track mode is entered The status bits update is discarded if SPI Error is detected Error Any of the following flags is set: • Bus error • Thermal Shutdown • TxEN Timeout • VCC Under−voltage • VIO Under−voltage • SPI Error All of the following Flags (Track mode) or Status bits (Latched mode) are reset: • Bus error • Thermal Shutdown • TxEN Timeout • VCC Under−voltage • VIO Under−voltage • SPI Error ERRN is set Low if Error flag is set and STBN is High Internal Error Flag There are two Error Signaling modes: • Track mode − the common Error flag is reset when all of the Error related flags are reset − Error flag is directly visible on ERRN pin if STBN pin is High. Minimum ERRN pin indication time is dBDERRNSTABLE. • Latched mode − the common Error flag is reset when all of the related Status Bits are reset (requires successful status Register read−out while all these flags are reset). The common Error flag is visible on ERRN pin if STBN pin is High and the particular flags are accessible via SPI interface. After Power−up the Error signaling is switched to the Latched mode by default (internal Pull−Up on CSN pin). When VIO is not in under−voltage Error indication Track mode can be selected by host request (setting CSN pin Low for longer than dERRNModeChange while SCK is set High − see Figure 5), or simply by leaving CSN pin permanently connected to GND and SCK pin permanently connected to VIO. As soon as Error Indication Track mode is selected, CSN pin internal Pull−Up is switched to Pull−Down providing the CSN pin input current is reduced. CSN SCK Error indication Latched Mode Error indication Track Mode dERRNModeChange (Internal Pull−Up) Error indication Latched Mode (Internal Pull−Up) (Internal Pull−Down) (Internal Pull−Up) Don’t care Don’t care Figure 5. Timing Diagram of Error Indication Mode Control. |
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