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ADDRESS SPACES S3C84E5/C84E9/P84E9
2-2
PROGRAM MEMORY (ROM)
Program memory (ROM) stores program codes or table data. The S3C84E5/84E9 has 16Kbytes and 32Kbytes of
internal mask programmable program memory. The program memory address range is therefore 0H–3FFFH and 0H-
7FFFH (see Figure 2-1).
The first 256 bytes of the ROM (0H-0FFH) are reserved for interrupt vector addresses. Unused locations in this
address range can be used as normal program memory. If you use the vector address area to store a program code,
be careful not to overwrite the vector addresses stored in these locations.
The ROM address at which a program execution starts after a reset is 0100H.
(Decimal)
32,767
255
(HEX)
7FFFH (S3C84E9/P84E9)
0FFH
0H0
32-KByte
Interrupt
Vector Area
(HEX)
3FFFH (S3C84E5)
(Decimal)
16,383
16-KByte
Figure 2-1. Program Memory Address Space