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L99ASC03 데이터시트(PDF) 44 Page - STMicroelectronics |
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L99ASC03 데이터시트(HTML) 44 Page - STMicroelectronics |
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44 / 73 page ![]() Electrical specifications L99ASC03 44/73 DocID023504 Rev 7 Table 29. SPI timing Symbol Parameter Test condition Min. Typ. Max. Unit fSCK Serial clock frequency 4.5 MHz tCSNQV CSN falling until SDO valid Cout = 50 pF 100 ns tCSNQT CSN rising until SDO tristate Cout = 50 pF 150 ns tSCKQV SCK falling until SDO valid Cout =50 pF 90 ns tSCSN CSN setup time before SCK rising 100 ns tSSDI SDI setup time before SCK rising 40 ns tHSDI SDI hold time after SCK rising 40 ns tHSCK Minimum SCK high time 105 ns tLSCK Minimum SCK low time 105 ns tHCSN Minimum CSN high time 4 µs tSSCK SCK setup time before CSN rising 100 ns tr SDO SDO rise time (20% /80%) COUT =50pF; ILOAD = -1 mA 50 100 ns tf SDO SDO fall time (20% /80%) COUT =50pF; ILOAD = 1 mA 50 100 ns tCSNTimeout CSN low timeout 65 ms |
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