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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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L9965TS Scheda tecnica(PDF) 24 Page - STMicroelectronics |
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L9965TS Scheda tecnica(HTML) 24 Page - STMicroelectronics |
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24 / 62 page  Fault type Assertion condition IC reaction to assertion Release condition IC reaction to status bit clear Maskable WKP_OT WKP_ERR = 1 and TSD = 1 • WKP driver is disabled • WKP_OT = 1 in GEN_STATUS1 • The FLT pin and the SPI FAULT is asserted in NORMAL if MSK_WKP_OT =0 in GEN_CFG3 Clear on read if fault condition is removed The driver is reengaged • TSD status bit non maskable • FLT pin and SPI FAULT maskable by bit MSK_WKP_OT in GEN_CFG3 5.4.2 Electrical parameters Table 18. Thermal shutdown electrical parameters Symbol Parameter Test conditions Min Typ Max Unit TTH_TSD_V5V V5V thermal shut-down, threshold equivalent temperature Guaranteed by design 165 deg TTH_ HYS_TSD_V5V Guaranteed by design 10 deg tFLT_TSD_V5V V5V thermal shut-down, detection filter time Digital filter 17 20 23 µs 5.5 Ground loss monitor To detect failures in grounding, the IC integrates a ground loss monitor. Such diagnostic is available on-demand in NORMAL state to cover latent failures. Diagnostic execution is enabled programming GEN_CGF_4.EN_GND_LOSS = 1. 5.5.1 Diagnostic functions Table 19. Ground loss monitor diagnostics Fault type Assertion condition IC reaction to assertion Release condition Maskable AGND, DGND LOSS • |AGND – DGND| > VGND_LOSS_TH for t > TGND_LOSS_FIL • GND_LOSS = 1 in GEN_STATUS1 • The FLT pin and the SPI FAULT are asserted in NORMAL if MSK_GND_LOSS = 0 in register GEN_CFG3 Clear on read if |AGND – DGND| < VGND_LOSS_TH for t > TGND_LOSS_FIL • GND_LOSS status bit non maskable • FLT pin and SPI FAULT maskable by bit MSK_GND_LOSS in GEN_CFG3 5.5.2 Electrical parameters Table 20. Ground loss monitor characteristics Symbol Parameter Test conditions Min Typ Max Unit Pin VGND_LOSS_TH Ground loss detection threshold Tested in production 100 200 300 mV AGND, DGND TGND_LOSS_FIL Ground loss detection filter time Tested by SCAN 300 µs AGND, DGND 5.6 Oscillators Each transceiver channel embeds two oscillators. A low frequency oscillator operates at fOSCI_SLEEP in the following states: • In DEEPSLEEP state it is the time base for wakeup source detection (SPI, VIF) L9965T/L9965TS Functional description DS14987 - Rev 1 page 24/62 |
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