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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L99LD02 датащи(PDF) 58 Page - STMicroelectronics |
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L99LD02 датащи(HTML) 58 Page - STMicroelectronics |
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58 / 66 page  Electrical specifications L99LD02 58/66 DS12448 Rev 3 6.4.3 System Oscillator and Digital Timings Digital timings guaranteed by scan. WD and auto-restart timings limits added to give indication on application cases. 6.4.4 SPI bus (CSN, SCK, SDI, SDO) Table 38. Digital timings description Symbol Parameter Test conditions Min Typ Max Unit tWD Watchdog timeout period 45 50 55 ms tCSN_TIMEOUT CSN timeout 90 115 140 ms tAUTORESTART Autorestart time in Limp Home mode 45 50 55 ms tVS,UV VS undervoltage filter time 32 µs tVDD_FT VDD Filtering Time 32 µs tWAKEUP Time for a complete wake up (V3V3 > VPOR_L) CSN low for t > tWAKEUP Cap on V3V3 = 1µF V3V3 > 3V 129 µs tSTDBY Time needed for a transition to standby mode (V3V3 < VPOR_L) CSN high for t > tSTDBY Cap on V3V3 = 1µF V3V3 < 2.5V 1ms tOVT Filtering time for overtemperature (OVT bit will be set if Tj > TTSD for more than tOVT) 1.2 µs tBST_OVP BST_OVP flag set filtering time 32 µs tBST_OVP_RST BST_OVP flag reset filtering time 10 ms tBOOST_OUT_FAIL BST_OUT_FAIL flag set filtering time 1.6 µs tTM_LOW Time needed for a transition to pre- standby mode (V3V3 > VPOR_L) 200 µs Table 39. CSN, SCK, SDI input Symbol Parameter Test conditions Min Typ Max Unit VIN_L Input voltage low threshold 0.3 * V3V3 V VIN_H Input voltage high threshold 0.7 * V3V3 V3V3 V IIN_L, SDI,SCK Low level input current VIN = 0.3 * V3V3 1µA IIN_L, CSN -10 µA IIN_H, SDI,SCK High level input current VIN = 0.7 * V3V3 10 µA IIN_H, CSN -1 µA |
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