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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) 21 Page - Renesas Technology Corp |
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R5F10RB8AFP датащи(HTML) 21 Page - Renesas Technology Corp |
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21 / 76 page  RL78/L12 2. ELECTRICAL SPECIFICATIONS (TARGET) Page 21 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 Oscillator Characteristics 2.2.1 Main system clock oscillator characteristics (TA = −40 to +85°C, 1.6 V ≤ EVDD = VDD ≤ 5.5 V, VSS = EVSS = 0 V) Resonator Recommended Circuit Parameter Conditions MIN. TYP. MAX. Unit 2.7 V ≤ VDD ≤ 5.5 V 1.0 20.0 MHz 1.8 V ≤ VDD < 2.7 V 1.0 8.0 MHz Ceramic resonator C1 X2 X1 C2 VSS Rd X1 clock oscillation frequency (fX) Note 1.6 V ≤ VDD <1.8 V 1.0 4.0 MHz 2.7 V ≤ VDD ≤ 5.5 V 1.0 20.0 MHz 1.8 V ≤ VDD < 2.7 V 1.0 8.0 MHz Crystal resonator C1 X2 X1 C2 VSS Rd X1 clock oscillation frequency (fX) Note 1.6 V ≤ VDD <1.8 V 1.0 4.0 MHz Note Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time. Cautions 1. When using the X1 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. Since the CPU is started by the high-speed on-chip oscillator clock after a reset release, check the X1 clock oscillation stabilization time using the oscillation stabilization time counter status register (OSTC) by the user. Determine the oscillation stabilization time of the OSTC register and the oscillation stabilization time select register (OSTS) after sufficiently evaluating the oscillation stabilization time with the resonator to be used. |
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