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PIC17C756 Datasheet(PDF) 5 Page - Microchip Technology |
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PIC17C756 Datasheet(HTML) 5 Page - Microchip Technology |
5 / 320 page © 1997 Microchip Technology Inc. Preliminary DS30264A-page 5 PIC17C75X 1.0 OVERVIEW This data sheet covers the PIC17C75X group of the PIC17CXXX family of microcontrollers. The following devices are discussed in this data sheet: • PIC17C752 • PIC17C756 The PIC17C75X devices are 68-Pin, EPROM-based members of the versatile PIC17CXXX family of low-cost, high-performance, CMOS, fully-static, 8-bit microcontrollers. All PIC16/17 microcontrollers employ an advanced RISC architecture. The PIC17CXXX has enhanced core features, 16-level deep stack, and multiple internal and external interrupt sources. The separate instruc- tion and data buses of the Harvard architecture allow a 16-bit wide instruction word with a separate 8-bit wide data path. The two stage instruction pipeline allows all instructions to execute in a single cycle, except for pro- gram branches (which require two cycles). A total of 58 instructions (reduced instruction set) are available. Additionally, a large register set gives some of the architectural innovations used to achieve a very high performance. For mathematical intensive applications all devices have a single cycle 8 x 8 Hardware Multi- plier. PIC17CXXX microcontrollers typically achieve a 2:1 code compression and a 4:1 speed improvement over other 8-bit microcontrollers in their class. PIC17C75X devices have up to 902 bytes of RAM and 50 I/O pins. In addition, the PIC17C75X adds several peripheral features useful in many high performance applications including: • Four timer/counters • Four capture inputs • Three PWM outputs • Two independant Universal Synchronous Asyn- chronous Receiver Transmitters (USARTs) • An A/D converter (12 channel, 10-bit resolution) • A Synchronous Serial Port (SPI and I2C w/ Master mode) These special features reduce external components, thus reducing cost, enhancing system reliability and reducing power consumption. There are four oscillator options, of which the single pin RC oscillator provides a low-cost solution, the LF oscil- lator is for low frequency crystals and minimizes power consumption, XT is a standard crystal, and the EC is for external clock input. The SLEEP (power-down) mode offers additional power saving. Wake-up from SLEEP can occur through several external and internal interrupts and device resets. A highly reliable Watchdog Timer with its own on-chip RC oscillator provides protection against software mal- function. There are four configuration options for the device operational mode: • Microprocessor • Microcontroller • Extended microcontroller • Protected microcontroller The microprocessor and extended microcontroller modes allow up to 64K-words of external program memory. Brown-out Reset circuitry has also been added to the device. This allows a device reset to occur if the device VDD falls below the Brown-out voltage trip point (BVDD). The chip will remain in Brown-out Reset until VDD rises above BVDD. Table 1-1 lists the features of the PIC17CXXX devices. A UV-erasable CERQUAD-packaged version (compat- ible with PLCC) is ideal for code development while the cost-effective One-Time Programmable (OTP) version is suitable for production in any volume. The PIC17C75X fits perfectly in applications that require extremely fast execution of complex software programs. These include applications ranging from precise motor control and industrial process control to automotive, instrumentation, and telecom applications. The EPROM technology makes customization of appli- cation programs (with unique security codes, combina- tions, model numbers, parameter storage, etc.) fast and convenient. Small footprint package options (including die sales) make the PIC17C75X ideal for applications with space limitations that require high performance. An In-circuit Serial Programming (ISP) feature allows: • Flexibility of programming the software code as one of the last steps of the manufacturing process High speed execution, powerful peripheral features, flexible I/O, and low power consumption all at low cost make the PIC17C75X ideal for a wide range of embed- ded control applications. 1.1 Family and Upward Compatibility The PIC17CXXX family of microcontrollers have archi- tectural enhancements over the PIC16C5X and PIC16CXX families. These enhancements allow the device to be more efficient in software and hardware requirements. Refer to Appendix A for a detailed list of enhancements and modifications. Code written for PIC16C5X or PIC16CXX can be easily ported to PIC17CXXX devices (Appendix B). 1.2 Development Support The PIC17CXXX family is supported by a full-featured macro assembler, a software simulator, an in-circuit emulator, a universal programmer, a “C” compiler, and fuzzy logic support tools. For additional information see Section 19.0. |
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