Prelim

Front 1

A memory cell is an electronic circuit wich can memoriza the state of one byte.

Back 1

Register

Front 2

Registers whose function is predetermined by the manufacturer.

Back 2

Special Function Register

Front 3

Registers (called a “port”) connected to the microcontroller pins.

Back 3

Input/Output Ports

Front 4

Part of a microcontroller used for data storage.

Back 4

Memory Unit

Front 5

Used to permamently save the program being executed.

Back 5

ROM

Front 6

This ROM are reserved for the great manufacturers.

Back 6

Masked ROM

Front 7

Programming the chip can only be done only once.

Back 7

One Time Programmable ROM (OTP ROM)

Front 8

Successor to the UV EPROM.Contents of this memory can be written and cleared practically an unlimited number of times.

Back 8

Flash Memory

Front 9

It is used for temporary storing data and intermediate results created and used during the operation of the microcontroller.

Back 9

Random Access Memory(RAM)

Front 10

The contents may be changed during operation but remains permamently saved even upon the power supply goes off.

Back 10

Electrically Erasable Programmable ROM (EEPROM)

Front 11

A unit which monitors and controls all processess within the microcontroller.

Back 11

Central Processor Unit (CPU)

Front 12

Part of the electronics which recognizes program instructions and runs other circuits.

Back 12

Instruction Decoder

Front 13

Performs all mathematical and logical operations upon data.

Back 13

Arithmetical Logic Unit (ALU)

Front 14

Is a SFR closely related to the operation of the ALU.

Back 14

Accumulators

Front 15

Consists of 8, 16 or more wires

Back 15

Bus

Front 16

Consists of as many lines as necessary for memory addressing. It is used to transmit the address from the CPU to the memory.

Back 16

Address Bus

Front 17

Is as wide as data, in our case it is 8 bits or wires wide. Used to connect all circuits inside the microcontroller

Back 17

Data Bus

Front 18

Enables a microcontroller to be connected to another microcontroller or to a PC using a serial cable.

Back 18

Serial Communication

Front 19

Another term for Serial communication.

Back 19

RS232 Communication

Front 20

Is usually configured so as to use quartz crystal or ceramic resonator for frequency stability.

Back 20

Oscillator

Front 21

Resets the whole electronics as soon as the microcontroller inours a state of emergency (voltage drop to a minimum due to electric noise).

Back 21

Brown-out

Front 22

Usually marked as MCLR(Master Clear Reset). Used for external reset of the microcontroller by applying logic 0 or 1 to it.

Back 22

Reset pin

Front 23

These are commonly 8 or 16-bit SFRs the content of which is automatically incremented by each coming pulse.

Back 23

Timers/Counters

Front 24

The microcontroller delegates the 'wait issue' to a 'specialist' which will respond only when something attention worthy happens.

Back 24

Interrupt

Front 25

Make your programs react to the hardware of the microcontrollers

Back 25

Interrupt

Front 26

An electronic timer that is used to detect and recover from computer malfunctions.

Back 26

Watchdog Timer

Front 27

An electronic circuit which converts continuous signals to discrete digital numbers.

Back 27

A/D Converter

Front 28

Program memory is where the instructions are stored.

Back 28

Core Memory

Front 29

Where data values are kept.

Back 29

Data Memory

Front 30

Number of instructions a microcontroller can have is determined by how many bits are in the program word.

Back 30

Core Memory

Front 31

Includes PIC10 family and portions of the PIC12 and PIC16 families.

Back 31

Baseline Architecture

Front 32

Includes members of the PIC12 and PIC16 families.

Back 32

Mid-Range Architecture

Front 33

Encompasses the PIC18 family.

Back 33

High Performace Architecture.