DSP, Micros & Memory


RF design simplified with single-chip microcontroller solution

21 November 2001 DSP, Micros & Memory

A new microcontroller family from Microchip Technology is claimed to simplify radio frequency designs while reducing component count and board space requirements. The company's 18-pin rfPIC12C509AG features an integrated 315/433 MHz ASK transmitter, while the 20-pin rfPIC12C509AF features an integrated 315/433 MHz FSK/ASK transmitter. Both low-power, single-chip RF solutions are the first of 10 planned devices in the rfPIC family which targets RF connectivity for high-volume embedded control applications, such as remote sensing, remote control, toys, security and access control.

The on-chip 315/433 MHz transmitter enable designs to conform to US FCC Part 15 regulations and European ERC 70-03E and EN 300 220-1 requirements. It features a VCO phase-locked to a quartz crystal reference, which allows narrow receiver bandwidth to maximise range and interference immunity. Both rfPIC devices contain 1024 words of program memory with 41 bytes of user RAM. They offer six I/O pins with on-chip clock oscillator, 33 single-word instructions, full-speed 1 ms instruction cycle at 4 MHz, seven special function hardware registers, two-level deep hardware stack, 8 bit realtime clock/counter with 8 bit programmable prescaler, watchdog timer and direct LED drive.

The rfPIC12C509AG and rfPIC12C-509AF feature Microchip's in-circuit serial programming technology, which allows the devices to be programmed after being placed in a circuit board. The rfPIC devices are supported by the complete range of PICmicro development systems including the MPLAB(r)-ICE 2000 universal in-circuit emulator.

To develop the rfPIC family Microchip has formed the Radio Frequency Products Group. The group expects to introduce 10 rfPIC devices during the next two years including flash and low-power versions.

Avnet Kopp (011) 444 2333

Azona (012) 665 2880

Memec SA (021) 674 4103

Tempe Technologies (011) 452 0530



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