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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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R5F10RB8AFP датащи(PDF) 23 Page - Renesas Technology Corp |
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R5F10RB8AFP датащи(HTML) 23 Page - Renesas Technology Corp |
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23 / 76 page  RL78/L12 2. ELECTRICAL SPECIFICATIONS (TARGET) Page 23 of 73 R01DS0157EJ0001 Rev.0.01 2012.02.20 Under development Preliminary document Specifications in this document are tentative and subject to change. Caution The pins mounted depend on the product. Refer to 1.3.1 32-pin products to 1.3.5 64-pin products. 2.2.3 Subsystem clock oscillator characteristics (TA = −40 to +85°C, 1.6 V ≤ EVDD = VDD ≤ 5.5 V, VSS = EVSS = 0 V) Resonator Recommended Circuit Items Conditions MIN. TYP. MAX. Unit Crystal resonator XT1 XT2 C4 C3 Rd VSS XT1 clock oscillation frequency (fXT) Note 32 32.768 35 kHz Note Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time. Cautions 1. When using the XT1 oscillator, wire as follows in the area enclosed by the broken lines in the above figures to avoid an adverse effect from wiring capacitance. • Keep the wiring length as short as possible. • Do not cross the wiring with the other signal lines. • Do not route the wiring near a signal line through which a high fluctuating current flows. • Always make the ground point of the oscillator capacitor the same potential as VSS. • Do not ground the capacitor to a ground pattern through which a high current flows. • Do not fetch signals from the oscillator. 2. The XT1 oscillator is designed as a low-amplitude circuit for reducing power consumption, and is more prone to malfunction due to noise than the X1 oscillator. Particular care is therefore required with the wiring method when the XT1 clock is used. Remark For the resonator selection and oscillator constant, customers are requested to either evaluate the oscillation themselves or apply to the resonator manufacturer for evaluation. |
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