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GENERAL DESCRIPTION

The rfPIC12C509AG/509AF from Microchip Technology is a low-cost, high performance, 8-bit, fully static, EPROM-based CMOS microcontroller combined with a UHF ASK/FSK transmitter. It employs a RISC architecture with only 33 single word/single cycle instructions. All instructions are single cycle (1 μs) except for program branches which take two cycles. The 12-bit wide instructions are highly symmetrical resulting in 2:1 code compression over other 8-bit microcontrollers in its class. The easy to use and easy to remember instruction set reduces development time significantly.

High-Performance RISC CPU:

? Only 33 single word instructions to learn

? All instructions are single cycle (1 μs) except for program branches which are two-cycle

? Operating speed: DC - 4 MHz clock input DC - 1 μs instruction cycle

? 12-bit wide instructions

? 8-bit wide data path

? Seven special function hardware registers

? Two-level deep hardware stack

? Direct, indirect and relative addressing modes for data and instructions

? Internal 4 MHz RC oscillator with programmable calibration (independent from transmitter quartz crystal reference)

? In-Circuit Serial Programming? (ICSP?)

Peripheral Features:

? 8-bit real time clock/counter (TMR0) with 8-bit programmable prescaler

? Power-On Reset (POR)

? Device Reset Timer (DRT)

? Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable operation

? Programmable code-protection

? Power saving SLEEP mode

? Wake-up from SLEEP on pin change

? Internal weak pull-ups on I/O pins

? Internal pull-up on MCLR pin

? Selectable oscillator options:

- INTRC: Internal 4 MHz RC oscillator

- EXTRC: External low-cost RC oscillator

- XT: Standard crystal/resonator

- LP: Power saving, low frequency crystal

UHF ASK/FSK Transmitter:

? Conforms to US FCC Part 15.231 regulations and European ERC 70-03E and EN 300 220-1 requirements

? VCO phase locked to quartz crystal reference; allows narrow band receivers to be used to maximize range and interference immunity

? Integrated crystal oscillator and VCO requiring minimum of external components

? Crystal frequency divide by 4 available (CLKOUT)

? Frequency range set by crystal: 310 – 480 MHz

? ASK Data rate: 0 – 40 Kbps

? FSK through crystal pulling allows modulation at 0 – 20 Kbps

? Adjustable output power: +2 dBm to -12 dBm in six discrete steps

? Differential output configurable for single or double ended loop antenna

? Power amplifier automatically disabled until after PLL lock

CMOS Technology:

? Low power, high speed CMOS EPROM technology

? Fully static design

? Wide operating voltage range

? Wide temperature range:

- Industrial: -40°C to +85°C

? PICmicro? MCU power consumption:

- < 2 mA @ 5V, 4 MHz

- 15 μA typical @ 3V, 32 KHz

- < 1 μA typical standby current

? Transmitter power consumption: (depending on power selection)

- 4.8 mA to 11.5 mA @ 3V

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