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  • PIC16F639 Microcontroller Overview
    The PIC16F639 is a suitable microcontroller for bidirectional communications, remote passive keyless entry and low-frequency sensing applications. The device includes a PIC16F636 microcontroller and a three channel Low-Frequency (LF) front-end device in a single 20-pin SSOP package. These two
  • Interfacing Microchip SPI Serial EEPROMs to NXP P89LPC9XX Microcontrollers Using Hardware Peripheral
    The 25XXX series serial EEPROMs from Microchip Technology are SPI compatible and have maximum clock frequencies ranging from 3 MHz to 20 MHz. Many times when designing an application which utilizes a serial EEPROM device, it may be beneficial to use a microcontroller which features a hardware
  • Implementation of an Asynchronous Serial I/O
    time of 200 ns @ 20 MHz input clock. Many microcontroller applications require chip-to-chip serial data communications. Since the PIC16C5X series has no on-chip serial ports, serial communication has to be performed in software. For many cost-sensitive high volume applications, implementation
  • Resistance and Capacitance Meter Using a PIC 16C622
    . The internal voltage reference has two ranges, each capable of 16 distinct voltage levels. Typical applications such as appliance controllers or low-power remote sensors can now be implemented using fewer external components thus reducing cost and power consumption. The 18-pin SOIC or 20-pin SSOP packages
  • Four-Channel Digital Voltmeter with Display and Keyboard
    The PIC16C71 is a member of the mid-range family of 8-bit, high-speed microcontrollers, namely, the PIC16CXXX. The PIC16C71 device's I/O ports have an improved sink/source specification. Each I/O pin can sink up to 25 mA and source 20 mA. In addition, total PORTB source current is 100 mA and sink
  • PLD Replacement
    microcontrollers from Microchip Technology Inc. It employs a Harvard architecture, (i.e., has a separate data bus [8-bit] and program bus [12-bit]). All instructions are single word and execute in one cycle except for program branches. The instruction cycle time is 200 ns at 20 MHz. PIC16C5X microcontrollers
  • Using the PIC16F639 MCU for Smart Wireless Applications
    The PIC16F639 is a suitable microcontroller for bidirectional communications and low-frequency sensing applications. The device includes a PIC16F636 microcontroller and a three channel Low-Frequency (LF) front-end device in a single 20-pin SSOP package. These two devices are internally connected
  • Interfacing 8051 MCUs with SPI Serial EEPROMs
    The 25XXX series serial EEPROMs from Microchip Technology support a half-duplex protocol that functions on a master-slave paradigm that is ideally suited to data stream applications. The bus is controlled by the microcontroller (master), which accesses the 25XXX serial EEPROM (slave) via a simple

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