Department of Computer Scien

ce and Information Engineering

National Cheng Kung University, TAIWAN

HANEL

PROGRAM COUNTER AND ROM SPACEROM Memory Map in 8051 Family

‰No member of 8051 family can access more than 64K bytes of opcode

¾The program counter is a 16-bit register

Byte

Byte

Byte

0000 0FFF

0000

0000

3FFF

7FFF

(^8751) AT89C51
DS89C420/30
DS5000-32