Program Memory (Rom) - Samsung S3C9454B User Manual

ADDRESS SPACES

PROGRAM MEMORY (ROM)

Normal Operating Mode
The S3C9454B/F9454B have 4-Kbytes (locations 0H–0FFFH) of internal mask-programmable program memory.
The first 2-bytes of the ROM (0000H–0001H) are interrupt vector address.
Unused locations (0002H–00FFH except 3CH, 3DH, 3EH, 3FH) can be used as normal program memory.
3CH, 3DH, 3EH, 3FH is used smart option ROM cell.
The program Reset address in the ROM is 0100H.
2-2
(Decimal)
4.095
4-Kbyte
Program
Memory
Area
256
Program Start
64
Smart option ROM cell
60
2
Interrupt Vector
1
0
Figure 2-1. Program Memory Address Space
(HEX)
1000H
0100H
0040H
003CH
0002H
0001H
0000H
S3C9454B/F9454B