Renesas offers a broad product portfolio of CMOS microprocessor and peripheral devices for timing and digital ICs. Included in this product lineup are our legacy 80C/82C CMOS 8-bit/16-bit microprocessors and CMOS clock generator drivers, as well as SPI Bus peripherals.
Product Selector: CMOS Microprocessor & Peripheral Devices
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Product SelectorDocumentation
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240 KB
AI-generated Summary:
Clock generation for the CDP1802 microprocessor uses a simple, stable crystal-controlled oscillator leveraging the on-chip oscillator amplifier and start/stop logic. Crystal oscillators require minimal external components, with frequency stability dependent on crystal Q and load capacitance. Practical designs recommend a 10MΩ to 22MΩ feedback resistor and capacitors around 20-30pF. For low-frequency needs, external RC oscillators provide cost-effective alternatives. Buffering the clock signal with a CMOS inverter reduces loading and noise. The document also details component selection and circuit examples for reliable clock generation.
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