Isp Reset Vector And Isp Sector Size - Samsung S3F80P5X User Manual

EMBEDDED FLASH MEMORY INTERFACE
1. By setting ISP Reset Vector Change Selection Bit (3EH.7) to '0', user can have the available ISP
area.
If ISP Reset Vector Change Selection Bit (3EH.7) is '1', 3EH.6 and 3EH.5 are meaningless.
2. If ISP Reset Vector Change Selection Bit (3EH.7) is '0', user must change ISP reset vector address
from 0100H to some address which user want to set reset address (0200H, 0300H, 0500H or
0900H).
If the reset vector address is 0200H, the ISP area can be assigned from 0100H to 01FFH (256bytes).
If 0300H, the ISP area can be assigned from 0100H to 02FFH (512bytes). If 0500H, the ISP area can
be from 0100H to 04FFH (1024bytes). If 0900H, the ISP area can be from 0100H to 08FFH
(2048bytes).
3. If ISP Protection Enable/Disable Bit is '0', user can't erase or program the ISP area selected by
3EH.1 and 3EH.0 in flash memory.
4. User can select suitable ISP protection size by 3EH.1 and 3EH.0. If ISP Protection Enable/Disable Bit
(3EH.2) is '1', 3EH.1 and 3EH.0 are meaningless.
Smart Option (003EH) ISP Size Selection Bit
Bit 2 Bit 1
1
0
0
0
0
NOTE: The area of the ISP sector selected by smart option bit (3EH.2 – 3EH.0) can't 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 14-2 by setting the ISP reset
vector address selection bits. (Refer to Figure 2-2 Smart Option).
Smart Option (003EH)
ISP Reset Vector Address Selection Bit
Bit 7 Bit 6
1
0
0
0
0
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).
14-4
Table 14-1. ISP Sector Size
Bit 0
x x
0 0
0 1
1 0
1 1
Table 14-2. Reset Vector Address
Bit 5
x x
0 0
0 1
1 0
1 1
NOTES
Area of ISP Sector
0
100H – 1FFH (256 Bytes)
100H – 2FFH (512 Bytes)
100H – 4FFH (1024 Bytes)
100H – 8FFH (2048 Bytes)
Reset Vector
Address after POR
0100H
0200H
0300H
0500H
0900H
S3F80P5_UM_ REV1.00
ISP Sector Size
256 Bytes
512 Bytes
1024 Bytes
2048 Bytes
Usable Area for
ISP Sector Size
ISP Sector
0
100H – 1FFH
100H – 2FFH
100H – 4FFH
100H – 8FFH
0
0
256 Bytes
512 Bytes
1024 Bytes
2048 Bytes