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L9924L датащи(PDF) 50 Page - STMicroelectronics |
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L9924L датащи(HTML) 50 Page - STMicroelectronics |
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50 / 84 page ![]() Watchdog L9924L 50/84 DocID028840 Rev 3 The following picture illustrates a typical watchdog refresh sequence. Figure 23. Typical watchdog refresh sequence 6.1 Power stage watchdog handling When a watchdog error occurs, the power stage is in the following conditions: Excitation off DFM off (the relevant SPI bits are cleared) LIN TX off (the relevant SPI bit is cleared) Lamp drivers: – on/off or off/on. The relevant outputs are conditioned by the relevant activation bits in SPI register (L_HS_EN and L_LS_EN) that cannot be on at the same time and with a default value of 1 for LS and 0 for HS. The effective lamp status is conditioned by L_KEY status. High current lamp drivers: – on/off or off/on. The relevant outputs are conditioned by the relevant activation bits in SPI register (LHC_HS_EN and LHC_LS_EN) that cannot be on at the same time and with a default value of 1 for LS and 0 for HS. The effective lamp status is conditioned by LHC_KEY status. |
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