S3F80JB

EMBEDDED FLASH MEMORY INTERFACE

 

 

ISPTM (ON-BOARD PROGRAMMING) SECTOR

ISPTM sectors located in program memory area can store On Board Program Software (Boot program code for upgrading application code by interfacing with I/O port pin). The ISPTM sectors can’t 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 (Refer to Figure 2-2 and Table 15-2). You can choose appropriate ISP sector size according to the size of On Board Program Software.

(Decimal)

65,536

255

0

384(256+128)byte

Internal RAM

Internal

Program

Memory

(Flash)

ISP Sector

Interrupt Vector Area

Smart Option ROM Cell

(HEX)

FFFFH

FE80H

01FFH, 02FFH, 04FFH or 08FFH

0FFH

03FH

03CH

00H

Figure 15-1. Program Memory Address Space

15-3

Page 282
Image 282
Samsung S3F80JB manual Isptm ON-BOARD Programming Sector, Program Memory Address Space