Chapter 2

Question 1

4 advantages of C programming

Answer 1

Easier and quicker to write in C
Easier to modify and update
Allows use of function libraries
Portable to other microcontrollers

Question 2

What is a register?

Answer 2

A register is a storage location n-bits wide that can be written to or read from all bits simultaneously

Question 3

Accumulator

Answer 3

Register to accumulate results - most versatile

Question 4

R registers

Answer 4

general purpose registers

Question 5

B registers

Answer 5

similar to accumulators but only for multiplication and division

Question 6

Data pointer

Answer 6

Points to data, the only 16 bit register

Question 7

Program counter

Answer 7

Points to next instruction in memory, 2-byte register

Question 8

Stack pointer

Answer 8

indicates the next value to be removed from the stack

Question 9

Unsigned char

Answer 9

8-bits, range of 0-255

Question 10

Signed char

Answer 10

8-bits, MSB denotes sign, range of -128 to +127

Question 11

Unsigned int

Answer 11

16-bits, range of 0-65535

Question 12

Signed int

Answer 12

16-bits, MSB denotes sign, range of -32768 to +32767

Question 13

Bit

Answer 13

1-bit, used for RAM

Question 14

Sbit

Answer 14

1-bit, used for Special function registers (SFR)

Question 15

Machine cycle

Fetch

Answer 15

Get an instruction from memory

Question 16

Machine cycle

Decode

Answer 16

Translate instruction into computer commands

Question 17

Machine cycle

Execute

Answer 17

Actually process a command

Question 18

Machine cycle

Store

Answer 18

Write the result of a processed command to memory