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RFPIC12C509AG Datasheet(PDF) 6 Page - Microchip Technology |
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RFPIC12C509AG Datasheet(HTML) 6 Page - Microchip Technology |
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6 / 104 page 
rfPIC12C509AG/509AF DS70031A-page 4 Premilinary © 2001 Microchip Technology Inc. 1.0 GENERAL DESCRIPTION The rfPIC12C509AG/509AF from Microchip Technol- ogy 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 architec- ture 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. The rfPIC12C509AG/509AF product is equipped with special features that reduce system cost and power requirements. The Power-on Reset (POR) and Device Reset Timer (DRT) eliminate the need for external RESET circuitry. There are four oscillator configura- tions to choose from, including INTRC internal oscilla- tor mode and the power-saving LP (Low Power) oscillator mode. Power saving SLEEP mode, Watch- dog Timer and code protection features also improve system cost, power and reliability. The Transmitter is a fully integrated UHF ASK/FSK transmitter consisting of crystal oscillator, phase- locked loop (PLL), open-collector differential-output Power Amplifier (PA), and mode control logic. External components consist of bypass capacitors, crystal, and PLL loop filter. There are no internal electrical connec- tions between the PICmicro MCU and the transmitter. The PICmicro MCU oscillator is independent from the transmitter crystal oscillator. The rfPIC12C509AG is capable of Amplitude Shift Key- ing (ASK) modulation by turning the PA on and off. The rfPIC12C509AF is capable of ASK or Frequency Shift Keying (FSK) modulation by employing an internal FSK switch to pull the transmitter crystal via a second load capacitor. The rfPIC12C509AG/509AF is a single channel device. The transmit frequency is fixed and set by an external reference crystal. Transmit frequencies in the range of 310 to 480 MHz can be selected. Output drive is an open-collector differential amplifier. The differential out- put is well suited for loop antennas. Output power is adjustable from +2 dBm to -12 dBm in six discrete steps. The rfPIC12C509AG/509AF are radio frequency (RF) emitting devices. Wireless RF devices are governed by a country’s regulating agency. For example, in the United States it is the Federal Communications Com- mittee (FCC) and in Europe it is the European Confer- ence of Postal and Telecommunications Administrations (CEPT). It is the responsibility of the designer to ensure that their end product conforms to rules and regulations of the country of use and/or sale. RF devices require correct board level implementation in order to meet regulatory requirements. Layout con- siderations are given in Section 7.0 UHF ASK/FSK Transmitter. The rfPIC12C509AG/509AF is available in the cost- effective One-Time-Programmable (OTP) version which is suitable for production in any volume. The cus- tomer can take full advantage of Microchip’s price lead- ership in OTP microcontrollers while benefiting from the OTP’s flexibility. The rfPIC12C509AG/509AF product is supported by a full-featured macro assembler, a software simulator, an in-circuit emulator, a ‘C’ compiler, a low-cost develop- ment programmer, and a full featured programmer. All the tools are supported on IBM® PC and compatible machines. 1.1 Applications The rfPIC12C509AG/509AF fits perfectly in applica- tions ranging from wireless remote operation, security systems, to low-power remote transmitters. The EPROM technology makes customizing application programs (transmitter codes, appliance settings, etc.) extremely fast and convenient. The small footprint packages make this rfPIC™ perfect for applications with space limitations. Low-cost, low-power, high per- formance, ease of use and I/O flexibility make the rfPIC12C509AG/509AF very versatile. |
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