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M16C/26 数据表(PDF) 35 Page - Renesas Technology Corp |
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M16C/26 数据表(HTML) 35 Page - Renesas Technology Corp |
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35 / 239 page  Clock Generating Circuit 29 Renesas Technology Corp. M16C/26 Group SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER Under development Preliminary Specifications Rev. 0.9 Specifications in this manual are tentative and subject to change. Microcomputer (Built-in feedback resistor) XIN XOUT Externally derived clock Open Vcc Vss Microcomputer (Built-in feedback resistor) XIN XOUT Rd CIN COUT (Note) Note: Insert a damping resistor if required. The resistance will vary depending on the oscillator and the oscillation drive capacity setting. Use the value recommended by the maker of the oscillator. When the oscillation drive capacity is set to low, check that oscillation is stable. Also, if the oscillator manufacturer's data sheet specifies that a feedback resistor be added external to the chip, insert a feedback resistor between XIN and XOUT following the instruction. Microcomputer (Built-in feedback resistor) XCIN XCOUT Externally derived clock Open Vcc Vss Note: Insert a damping resistor if required. The resistance will vary depending on the oscillator and the oscillation drive capacity setting. Use the value recommended by the maker of the oscillator. Also, if the oscillator manufacturer's data sheet specifies that a feedback resistor be added external to the chip, insert a feedback resistor between XCIN and XCOUT following the instruction. Microcomputer (Built-in feedback resistor) XCIN XCOUT (Note) CCIN CCOUT RCd Figure 1.8.2. Examples of sub-clock Figure 1.8.1. Examples of main clock Figure 1.8.1 shows some examples of the main clock circuit, one using an oscillator connected to the circuit, and the other one using an externally derived clock for input. Figure 1.8.2 shows some examples of sub-clock circuits, one using an oscillator connected to the circuit, and the other one using an externally derived clock for input. Circuit constants in Figures 1.8.1 and 1.8.2 vary with each oscillator used. Use the values recommended by the manufacturer of your oscillator. |
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