Program Memory Address Space - Samsung S3F80JB User Manual

S3F80JB
TM
ISP (ON-BOARD PROGRAMMING) SECTOR
TM
ISP sectors located in program memory area can store On Board Program Software (Boot program code for
upgrading application code by interfacing with I/O port pin). The ISP
'LDC' instruction for the safety of On Board Program Software.
The ISP sectors are available only when the ISP enable/disable bit is set 0, that is, enable ISP at the Smart
Option. If you don't like to use ISP sector, this area can be used as a normal program memory (can be erased or
programmed by 'LDC' instruction) by setting ISP disable bit ("1") at the Smart Option. Even if ISP sector is
selected, ISP sector can be erased or programmed in the tool program mode by serial programming tools.
The size of ISP sector can be varied by settings of smart option (Refer to Figure 2-2 and Table 15-2). You can
choose appropriate ISP sector size according to the size of On Board Program Software.
(Decimal)
65,536
255
0
384(256+128)byte
Internal RAM
Internal
Program
Memory
(Flash)
ISP Sector
Interrupt Vector Area
Smart Option ROM Cell
Figure 15-1. Program Memory Address Space
EMBEDDED FLASH MEMORY INTERFACE
TM
sectors can't be erased or programmed by
(HEX)
FFFFH
FE80H
01FFH, 02FFH, 04FFH or 08FFH
0FFH
03FH
03CH
00H
15-3