Samsung S3F80JB Area of ISP Sector ISP Sector Size, ISP Reset Vector and ISP Sector Size, Bit

S3F80JB EMBEDDED FLASH MEMORY INTERFACE

NOTES

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.

Table 15-2. ISP Sector Size

Smart Option (003EH) ISP Size Selection Bit			Area of ISP Sector	ISP Sector Size
Bit 2	Bit 1	Bit 0
1	x	x	0		0
0	0	0	100H – 1FFH (256 Bytes)	256	Bytes
0	0	1	100H – 2FFH (512 Bytes)	512	Bytes
0	1	0	100H – 4FFH (1024 Bytes)	1024 Bytes
0	1	1	100H – 8FFH (2048 Bytes)	2048 Bytes

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 15-3 by setting the ISP reset vector address selection bits. (Refer to Figure 2-2 Smart Option).

Table 15-3. Reset Vector Address

	Smart Option (003EH)			Reset Vector	Usable Area for	ISP Sector Size
ISP Reset Vector Address Selection Bit				Address after POR	ISP Sector
Bit 7		Bit 6	Bit 5
1		x	x	0100H	0	0
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).

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