FlashFlex MCU
SST89E516RD2 / SST89E516RD
SST89V516RD2 / SST89V516RD
Data Sheet
TABLE
EA#
1
1
1
1
1
0
0
0
4-2: IAP Address Resolution
SFCF[1:0]
00
00
00
01, 10, 11
01, 10, 11
00
00
01, 10, 11
Address of IAP Inst.
>= 2000H (Block 0)
>= 2000H (Block 0)
< 2000H (Block 1)
Any (Block 0)
Any (Block 0)
From external
From external
From external
Target Address
>= 2000H (Block 0)
< 2000H (Block 1)
Any (Block 0)
>= 2000H (Block 0)
< 2000H (Block 1)
>= 2000H (Block 0)
< 2000H (Block 1)
Any (Block 0)
Block Being Programmed
None
1
Block 1
Block 0
None
1
Block 1
Block 0
Block 1
Block 0
T4-2.0 1273
1. No operation is performed because code from one block may not program the same originating block
4.2.4 In-Application Programming Mode
Commands
All of the following commands can only be initiated in the
IAP mode. In all situations, writing the control byte to the
SFCM register will initiate all of the operations. All com-
mands will not be enabled if the security locks are enabled
on the selected memory block.
The Program command is for programming new data into
the memory array. The portion of the memory array to be
programmed should be in the erased state, FFH. If the
memory is not erased, it should first be erased with an
appropriate Erase command.
Warning: Do not attempt to
write (program or erase) to a block that the code is cur-
rently fetching from. This will cause unpredictable pro-
gram behavior and may corrupt program data.
4.2.4.1 Chip-Erase
The Chip-Erase command erases all bytes in both memory
blocks. This command is only allowed when EA#=0 (exter-
nal memory execution). Additionally this command is not
permitted when the device is in level 4 locking. In all other
instances, this command ignores the Security Lock status
and will erase the security lock bits and re-map bits.
IAP Enable
ORL SFCF, #40H
Set-Up
MOV SFDT, #55H
Polling scheme
MOV SFCM, #01H
Interrupt scheme
MOV SFCM, #81H
SFST[2] indicates
operation completion
INT1 interrupt
indicates completion
1273 F05.0
©2007 Silicon Storage Technology, Inc.
S71273-03-000
1/07
35
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