Cypress microcontrollers integrate programmable analog circuits (Figure

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Cypress microcontrollers integrate programmable analog circuits (Figure [Copy link]

Cypress microcontrollers integrate programmable analog circuits (Figure)

Cypress MicroSystems of the United States recently launched a new product of the "PSoC" series LSI "CY8C27", which integrates programmable analog circuits and 8-bit microcontrollers into a single chip. By adopting the switching capacitor method, the parameters and circuit structure of the analog circuit part can be dynamically changed through software. In this way, there is no need to change or externalize passive components, and the package area can be reduced. It is said that in addition to using it for fan control in Apple's notebook computers in the United States, it has been widely used in commercial purposes such as electric meters, magnetic card readers, and lighting equipment control. The company is a subsidiary of Cypress Semiconductor of the United States. 　　In addition to the products launched by Cypress this time, other programmable analog ICs include the "FPAA (field programmable analog array)" of Anadigm in the United States and the "ispPAC" of Lattice Semiconductor in the United States. The price of these products is about $10, while the characteristic of the PSoC launched this time is that although it integrates a control microcontroller and an AD converter, the cost is less than $2. By integrating a microcontroller, the signal control from the analog circuit can be completed with a single chip. The microcontroller is equipped with the 8-bit CPU core "M8" developed by Cypress, and the operating frequency is 24MHz. 　　CY8C27 integrates analog components based on operational amplifiers. The frequency band of the operational amplifier supports up to 100kHz, and the compensation voltage is +6mV. It supports rail-to-rail function that can swing the signal to the full operating voltage. Using the free development tool "PSoC Designer 4.0" dedicated to PSoC, it is possible to develop the module component structure and the software running on the microcontroller. 　　CY8C27 integrates 16KB flash EEPROM and 256B SRAM for microcontrollers. At the same time, two varieties, "CY8C24" and "CY8C22", which reduce analog components to 6 and 3 respectively, are also launched. The prices are 99 cents and 69 cents respectively. CY8C24 and CY8C22 are mainly used for in-vehicle applications such as airbag control by connecting to the in-vehicle LAN "LIN". (Reporter: Tomonori Shindo)

Article author: Nikkei BP