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ST72334J2TA/XXX 데이터시트(PDF) 119 Page - STMicroelectronics |
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ST72334J2TA/XXX 데이터시트(HTML) 119 Page - STMicroelectronics |
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119 / 150 page ![]() ST72334xx-Auto, ST72314xx-Auto, ST72124Jx-Auto 119/150 CLOCK AND TIMING CHARACTERISTICS (Cont’d) 15.5.3.2 Typical Ceramic Resonators Note: tSU(OSC) is the typical oscillator start-up time measured between VDD=2.8V and the fetch of the first instruction (with a quick VDD ramp-up from 0 to 5V (<50µs). Figure 68. Application with Ceramic Resonator Notes: 1. Resonator characteristics given by the ceramic resonator manufacturer. 2. tSU(OSC) is the typical oscillator start-up time measured between VDD=2.8V and the fetch of the first instruction (with a quick VDD ramp-up from 0 to 5V (<50µs). 3. The oscillator selection can be optimized in terms of supply current using a high quality resonator with small RS value. Refer to Table 23 and Table 24 and to the ceramic resonator manufacturer’s documentation for more details. Symbol Parameter Conditions Typ Unit tSU(osc) Ceramic resonator start-up time LP 2MHz 4.2 ms MP 4MHz 2.1 MS 8MHz 1.1 HS 16MHz 0.7 OSC2 OSC1 fOSC CL1 CL2 i2 RF ST72XXX RESONATOR WHEN RESONATOR WITH INTEGRATED CAPACITORS RD RF(EXT) |
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