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AXM0F243 数据表(PDF) 21 Page - ON Semiconductor |
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AXM0F243 数据表(HTML) 21 Page - ON Semiconductor |
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21 / 53 page ![]() AXM0F243 www.onsemi.com 21 SWD Interface Table 29. SWD INTERFACE SPECIFICATIONS Parameter Description Min Typ Max Units Details/ Conditions F_SWDCLK1 3.3 V ≤ VDD ≤ 3.6 V – – 14 MHz SWDCLK ≤ 1/3 CPU clock frequency F_SWDCLK2 1.8 V ≤ VDD ≤ 3.3 V – – 7 SWDCLK ≤ 1/3 CPU clock frequency T_SWDI_SETUP [12] T = 1/f SWDCLK 0.25*T – – ns – T_SWDI_HOLD [12] T = 1/f SWDCLK 0.25*T – – – T_SWDO_VALID [12] T = 1/f SWDCLK – – 0.5*T – T_SWDO_HOLD [12] T = 1/f SWDCLK 1 – – – 12.Guaranteed by characterization. Internal Main Oscillator Table 30. IMO DC SPECIFICATIONS * Parameter Description Min Typ Max Units Details/ Conditions IIMO1 IMO operating current at 48 MHz − – 250 mA – IIMO2 IMO operating current at 24 MHz − – 180 mA – *Guaranteed by design. Table 31. IMO AC SPECIFICATIONS Parameter Description Min Typ Max Units Details/ Conditions FIMOTOL1 Frequency variation at 24, 32, and 48 MHz (trimmed) − – ±2 % – TSTARTIMO IMO startup time − – 7 ms – TJITRMSIMO2 RMS jitter at 24 MHz − 145 − ps – Internal Low−Speed Oscillator Table 32. ILO DC SPECIFICATIONS * Parameter Description Min Typ Max Units Details/ Conditions IILO1 ILO operating current − 0.3 1.05 mA – *Guaranteed by design. Table 33. ILO AC SPECIFICATIONS Parameter Description Min Typ Max Units Details/ Conditions TSTARTILO1 [13] ILO startup time − – 2 ms – TILODUTY [13] ILO duty cycle 40 50 60 % – FILOTRIM1 ILO frequency range 20 40 80 kHz – 13.Guaranteed by characterization. Table 34. WATCH CRYSTAL OSCILLATOR (WCO) SPECIFICATIONS Parameter Description Min Typ Max Units Details / Conditions FWCO Crystal Frequency – 32.768 – kHz FTOL Frequency tolerance – 50 250 ppm With 20−ppm crystal ESR Equivalent series resistance – 50 – kW PD Drive Level – – 1 mW |
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