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Low cost Flash memory devices

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MICROCHIP Technology has expanded its PIC18F family of PICmicro Flash microcontrollers, to include low-cost 48kB and 64kB memory devices that offer designers added I/Os, timers, a feature-rich peripheral set and the flexibility of field self-programmability.

Available in 64 and 80-pin TQFP packages, the PIC18F8525/6525 and PIC18F8621/6621 microcontrollers are code-compatible with the company's current 18, 28 and 40-pin portfolio.

This enables designers to migrate to higher performance devices and to re-use software and hardware in existing platforms, thus lowering overall development costs and enabling a quicker time-to-market.

These are the newest members of Microchip's 8-bit PICmicro microcontroller family, which recently secured the number one position in worldwide 8-bit microcontroller unit shipments, according to Gartner Dataquest.

The microcontrollers feature Microchip's advanced PMOS Electrically Erasable Cell (PEEC) process technology, which provides best-in-class erase/write endurance, retention, and disturb reliability for both program and on-chip data EEPROM memory.

Featuring an optimised programming time, an entire memory array can be fully erased and programmed in less than 2 seconds. An individual word can be erased and programmed in less than 3 milliseconds.

The devices are specified for up to 1,000,000 data memory ERASE/WRITE cycles and up to 100,000 program memory ERASE/WRITE cycles with 40 years of data retention.

The devices feature either 48 or 64 kilobytes of Flash memory, 4kB of RAM memory and 1024 bytes of high-endurance EEPROM data memory.

The peripheral set includes an analogue-to-digital converter (ADC) with up to 16 channels x 10-bit resolution, 2 Capture/Compare/PWM modules, 3 Enhanced Capture/Compare/PWM modules, up to 10 MIPS performance at 10 MHz, two 8-bit timers, three 16-bit timers and one watch-dog timer (WDT), dual analogue comparators and a parallel slave port (PSP).

Additional features include an operating voltage range of 2.0 - 5.5 volts, programmable brown-out detection/reset (PBOR), programmable 16-level Low Voltage Detection module (PLVD), 32kHz secondary oscillator clock input and a 4x phase lock loop (PLL) for high-frequency oscillators.

Serial I/O features include SPI?, I2C?, and two LIN compatible addressable USART modules supporting RS485 and RS232.

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