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Read e-book online Embedded Microcontroller Interfacing: Designing Integrated PDF

By Gourab Sen Gupta

ISBN-10: 3642136354

ISBN-13: 9783642136351

Mixed-Signal Embedded Microcontrollers are primary in integrating analog parts had to regulate non-digital digital structures. they're utilized in instantly managed units and items, resembling vehicle engine keep an eye on platforms, instant distant controllers, workplace machines, domestic home equipment, energy instruments, and toys. Microcontrollers make it low-priced to digitally keep an eye on much more units and tactics by means of decreasing the scale and value, in comparison to a layout that makes use of a separate microprocessor, reminiscence, and input/output units. in lots of undergraduate and post-graduate classes, instructing of mixed-signal microcontrollers and their use for undertaking paintings has develop into obligatory. scholars face loads of problems once they need to interface a microcontroller with the electronics they care for. This publication addresses a few problems with interfacing the microcontrollers and describes a few undertaking implementations with the Silicon Lab C8051F020 mixed–signal microcontroller. The meant readers are university and collage scholars focusing on electronics, computers engineering, electric and electronics engineering; researchers concerned with electronics established method, practitioners, technicians and typically anyone attracted to microcontrollers dependent projects.

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1: Internal Bias Generator On. Internal Reference Buffer Enable Bit 0: Internal Reference Buffer Off. 1: Internal Reference Buffer On. Internal voltage reference is driven on the VREF pin. 11 Programmable Counter Array (PCA) The Programmable Counter Array (PCA0) provides enhanced timer functionality while requiring less CPU time. PCA0 consists of a dedicated 16-bit counter/timer and five 16-bit capture/compare modules. Each capture/compare module has its own associated I/O line (CEXn) which is routed through the Crossbar to Port I/O when enabled.

For the Comparator0, the hysteresis is programmed using bits 3-0 in the Comparator0 Control Register CPT0CN. The amount of negative hysteresis voltage is determined by the settings of the CP0HYN bits; in a similar way, the 34 2 Introduction to Silicon Labs C8051F020 Microcontroller amount of positive hysteresis is determined by the setting the CP0HYP bits. 12. VIN- and VIN+ are the input signals at CP0-/CP1- and CP0+/CP1+ respectively. Fig. 3 Comparator Output and Interrupt The output of the comparator can be polled in software, or can be used as an interrupt source.

1. 2 Logical Operators Logical operators operate on Boolean data (True and False) and the outcome is also Boolean. 2. 2 Logical Operators Operator && || ! 3 Bitwise Logical Operators As well as the Logical operators that operate on integer or character data, the C language also has bitwise logical operators. 3. 3 Bit valued logical operators Operator & | ~ ^ Description Bitwise AND Bitwise OR Bitwise NOT Bitwise XOR Bitwise logical operators operate on each bit of the variables individually. Example: X = 0x40 | 0x21; The above statement will assign the value 0x61 to the variable X.

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Embedded Microcontroller Interfacing: Designing Integrated Projects by Gourab Sen Gupta


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