Samsung F8274X Computer Hardware User Manual


 
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).