The Quintessential PIC Microcontroller by Sid Katzen BSc, MSc, DPhil, MIEE, MIEEE, CEng (auth.)
By Sid Katzen BSc, MSc, DPhil, MIEE, MIEEE, CEng (auth.)
The necessary PIC® Microcontroller offers with the significant `intelligence’ of such a lot shrewdpermanent embedded electronic platforms and goals to provide the reader the boldness to layout, build and application a true operating method utilizing the commercial common and well known Microchip PIC kin of units because the exemplar.
Aimed in particular at a readership without past wisdom of software program, electronics or common sense layout, this publication is appropriate for either business engineers and hobbyists. scholars of digital Engineering and laptop technology, taking appropriate classes or engaged in undertaking paintings at both an below- or postgraduate point, will locate it an incredible textbook.
The moment variation has been widely rewritten to either rationalize and make clear the introductory chapters and to replace and expand the middle fabric. while the thrust is still with the Mid-range units, an extra bankruptcy has additionally been further at the Extended-range family.
Key good points include:
• using present real-world and software program items to demonstrate the fabric
• quite a few totally labored examples in addition to self-assessment questions
• An linked site delivering strategies, extra examples, listings and worthwhile assets at http://www.engj.ulst.ac.uk/sidk/quintessential
• transparent and concise presentation of key issues and underlying recommendations
Read Online or Download The Quintessential PIC Microcontroller PDF
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Extra info for The Quintessential PIC Microcontroller
Sample text
20 The SISO shift register. a b _fLJl_ Input lD Cl a b a b c d e J---=-+----i:tlm Q Output d Q Fig. 21 The T flip flop. stant frequency inputpulse train is half this frequency. This waveform is a precision squarewave, provided that the input frequency remains constant. This T flip flop is sometimes known as a binary or a divide-by-2. T flip flops can of course be cascaded, as shown in Fig. 22(a). Here four ~ triggered flip flops are chained, with the output of binary n clocking binary n + 1. Thus if the input Count frequency was 8KHz, then 2.
The circuit illustrated here implements an up count. If the complement Qlines are used as the outputs, but with the clocking arrangements remaining the same, then the count sequence will decrement, that is a down count. Likewise, if ____/ triggered flip flops, such as the 74LS74 dual flip flop (see Fig. 23), are used as the storage element, then the count will be down. It is easily possible to use some simple logic to combine the two functions to produce a programmable up/down counter. It is also feasible to provide logic to Ioad the flip flop array in parallel with any number and then count up or down from that point.
To be able to write short programs using a symbolic assembly-level language and appreciate its one-to-one relationship to machine code. The architecture of the great majority of general-purpose computers and microprocessors is modeled after the von Neumann model shown in S. Katzen, The Quintessential PIC Microcontroller © Springer-Verlag London 2001 42 The Quintessential PIC Microcontroller Fig. 1. 1 The few electronic computers in use up to the late 1940s either only ever ran one program (like the war time code breaking Colossus) or eise needed tobe partly rewired to change their behavior (for example the ENIAC).