Overview As a representative of electronic medical products, blood pressure monitors have rapidly spread in many families in recent years. With the widespread use of the upper-arm blood pressure monitor, the demand for a wrist-type blood pressure monitor that can be easily measured is increasing, and the miniaturization of the device and the life of the battery are particularly necessary. In addition, in order to measure the sharing of data, and wherever data can be called up, it is necessary to strengthen the communication function of the computer or mobile phone and USB/Bluetooth to the general network. Depending on the long life of the battery, or the miniaturization of the device, the number of batteries required can be reduced, and thus low power consumption is required. The measurement of blood pressure is that the pressure sensor changes the frequency through the frequency conversion circuit, so the method of using the timer to measure is popularized. In addition, a built-in PWM timer that pressurizes the measurement airbag and a UART that supports communication functions are also necessary. Renesas has a rich line of MCUs, including 78K0/Lx3, R8C/Lx with built-in LCD driver control circuit for low power consumption, built-in peripheral functions required for blood pressure monitors, and built-in watchdog timer (WDT), real-time clock (RTC), reduce external components, and achieve cost reduction. Functional block diagram Related Renesas products main controller The 78K0R / LX3 microcontroller is a 16-bit microcontroller microcontroller. It includes 78K0R CPU core and peripheral functional devices such as ROM/RAM, LCD controller/driver, A/D, D/A converter, operational amplifier, multi-function serial interface, multi-function timer, real-time counter, and watch Door dog timer. Details: 78K0LC3 low power 8-bit MCU with built-in LCD The R8CLx has a built-in LCD low-power 8-bit MCU, and the R8C/Lx series has an LCD driver control circuit. It inherits many of the peripheral functions of the R8C/3x family of products (such as multi-function timers and various communication functions) and the easy-to-use LCD driver control circuit in the 38000/740 and H8/300L ultra-low power series. The R8C/Lx series has the following main features and supports a variety of LCD panel devices. Details: R8CLx built-in LCD low power 8-bit MCU sensor Details: HA1630xxx series Universal surge absorbing circuit protection Details: HSM123 Switching Diode HRC0103C Schottky Diode USB interface Details: RKZ6.8Z4KT Zener diode for surge protection Motor, valve, pulsation Details: UPA2761UGR P-Channel MOSFET
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