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EMBEDDED FLASH MEMORY INTERFACE S3F8275X
16-6
Table 16-1. ISP Sector Size
Smart Option(003EH) ISP Size Selection Bit
Bit 2 Bit 1 Bit 0
Area of ISP Sector ISP Sector Size
1 x x
−
0
0 0 0 100H – 1FFH (256 byte) 256 Bytes
0 0 1 100H – 2FFH (512 byte) 512 Bytes
0 1 0 100H – 4FFH (1024 byte) 1024 Bytes
0 1 1 100H – 8FFH (2048 byte) 2048 Bytes
NOTE: The area of the ISP sector selected by Smart Option bit (003EH.2 − 003EH.0) can not be erased and programmed
by LDC instruction in user program mode.
ISP Reset Vector and ISP Sector Size
If you use ISP sectors by setting the ISP enable/disable bit to "0" and the Reset Vector Selection bit to "0" at the
Smart Option, you can choose the reset vector address of CPU as shown in Table 16-3 by setting the ISP Reset
Vector Address Selection bits.
Table 16-2. Reset Vector Address
Smart Option (003EH) ISP Reset
Vector Address Selection Bit
Bit 7 Bit 6 Bit 5
Reset Vector
Address After POR
Usable Area for ISP
Sector
ISP Sector Size
1 x x 0100H
− −
0 0 0 0200H
100H − 1FFH
256 Bytes
0 0 1 0300H
100H − 2FFH
512 Bytes
0 1 0 0500H
100H − 4FFH
1024 Bytes
0 1 1 0900H
100H − 8FFH
2048 Bytes
NOTE: The selection of the ISP reset vector address by smart option (003EH.7 – 003EH.5) is not dependent of the
selection of ISP sector size by smart option (003EH.2 – 003EH.0).