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ST7LITE49K2 数据表(PDF) 208 Page - STMicroelectronics |
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ST7LITE49K2 数据表(HTML) 208 Page - STMicroelectronics |
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208 / 245 page  Electrical characteristics ST7LITE49K2 208/245 Figure 98. Typical application with an external clock source 13.6.1 Auto-wakeup from Halt oscillator (AWU) Table 84. External clock source characteristics Symbol Parameter Conditions Min Typ Max Unit VOSC1H or VCLKIN_H OSC1/CLKIN input pin high level voltage see Figure 98 0.7xVDD VDD V VOSC1L or VCLKIN_L OSC1/CLKIN input pin low level voltage VSS 0.3xVDD tw(OSC1H) or tw(CLKINH) tw(OSC1L) or tw(CLKINL) OSC1/CLKIN high or low time(1) 1. Data based on design simulation and/or technology characteristics, not tested in production. 15 ns tr(OSC1) or tr(CLKIN) tf(OSC1) or tf(CLKIN) OSC1/CLKIN rise or fall time(1) 15 IL OSCx/CLKIN Input leakage current VSS≤VIN≤VDD ±1 μA OSC1/CLKIN OSC2 fOSC EXTERNAL ST7xxx CLOCK SOURCE Not connected internally VOSC1L or VCLKINL VOSC1H or VCLKINH tr(OSC1 or CLKIN)) tf(OSC1 or CLKIN) tw(OSC1H or CLKINH)) tw(OSC1L or CLKINL) IL 90% 10% Table 85. AWU from Halt characteristics Symbol Parameter(1) 1. Guaranteed by Design. Not tested in production. Conditions Min Typ Max Unit fAWU AWU oscillator frequency 16 32 64 kHz tRCSRT AWU oscillator startup time 50 µs |
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