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S3F8275X EMBEDDED FLASH MEMORY INTERFACE
16-5
ISP
TM
(ON-BOARD PROGRAMMING) SECTOR
ISP
TM
sectors located in program memory area can store on board program software (boot program code for
upgrading application code by interfacing with I/O pin). The ISP
TM
sectors can not be erased or programmed by
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. You can choose appropriate ISP sector size
according to the size of On Board Program software.
(HEX)
3FFFH
3FH
Smart Option Area
FFH
8FFH
Interrupt Vector Area
16K-bytes
Internal Program
Memory Area
Available
ISP Sector Area
3CH
00H
(Decimal)
16,383
255
0
S3F8275X
Figure 16-5. Program Memory Address Space