S3F80P5_UM_ REV1.00 EMBEDDED FLASH MEMORY INTERFACE
SMART OPTION
Smart option is the program memory option for starting condition of the chip. The program memory addresses
used by smart option are from 003CH to 003FH. The S3F80P5 only use 003EH and 003FH. User can write any
value in the not used addresses (003CH and 003DH). The default value of smart option bits in program memory
is 0FFH (Normal reset vector address 100H, ISP protection disable). Before execution the program memory
code, user can set the smart option bits according to the hardware option for user to want to select.
.7 .6 .5 .4 .3 .2 .1 .0MSB LSB
ROM Address: 003FH
RESET Control Bit
0 = External interrupts by P0 and P2 or
SED&R generate the reset signal
1 = External interrupts by P0 and P2 or
SED&R do not generate the reset signal
ISP Reset Vector Address Selection Bits:
(2)
00 = 200H (ISP Area size: 256 bytes)
01 = 300H (ISP Area size: 512 bytes)
10 = 500H (ISP Area size: 1024 bytes)
11 = 900H (ISP Area size: 2048 bytes)
ROM Address: 003EH
ISP Protection Size
Selection Bits:
(4)
00 = 256 bytes
01 = 512 bytes
10 = 1024 bytes
11 = 2048 bytes
.7 .6 .5 .4 .3 .2 .1 .0MSB LSB
ISP Protection Enable/Disable Bit:
(3)
0 = Enable (Not erasable)
1 = Disable (Erasable)
ISP Reset Vector Change Selection Bit:
(1)
0 = OBP Reset vector address
1 = Normal vector (address 100H)
Not used
Not used
ROM Address: 003DH
.7 .6 .5 .4 .3 .2 .1 .0MSB LSB
ROM Address: 003CH
.7 .6 .5 .4 .3 .2 .1 .0MS B LSB
Not used
Not used
(5)
Figure 14-2. Smart Option
14-3