ARM Co-Processor Interface Quiz

What is the purpose of a Co Processor?

• To enhance the functionality of ARM

• To reduce the instruction set

• To increase the clock speed

• To manage memory

How many coprocessors can be connected to ARM?

• 8

• 16

• 32

• 4

What happens if a coprocessor cannot execute an instruction?

• ARM defines Undefined instruction trap

• The instruction is ignored

• The instruction is executed in software

• The system crashes

What is the function of the Cpi signal?

• Indicates that ARM has identified a coprocessor instruction

• Indicates that the co-processor is busy

• Indicates that there is no co-processor available

• Indicates that the instruction is ready to execute

What does the co-processor do when it receives an instruction?

• It executes the instruction immediately

• It waits for ARM to execute

• It moves data through the input buffer

• It ignores the instruction

What is the maximum number of registers per coprocessor?

• 8

• 16

• 32

• 4

What is the role of the handshake logic in a co-processor?

• To communicate with ARM

• To fetch instructions

• To decode instructions

• To execute instructions

What does the Cpa signal indicate?

• There is no co-processor available

• The co-processor is busy

• The instruction is ready to execute

• The instruction has been accepted

What is the instruction format for a Floating-Point Addition operation?

• ADDS R1,R2,R3

• FADD RF1,RF2,RF3

• SUB R4,R5,R6

• ADD R1,R2,R3

What does the Cpb signal indicate?

• The co-processor cannot begin execution yet

• The instruction is ready to execute

• There is no co-processor available

• The instruction has been accepted