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SST89E58RD2-33-C-TQI Datasheet(PDF) 35 Page - Silicon Storage Technology, Inc

No. de pieza SST89E58RD2-33-C-TQI
Descripción Electrónicos  FlashFlex51 MCU
Download  81 Pages
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Fabricante Electrónico  SST [Silicon Storage Technology, Inc]
Página de inicio  http://www.sst.com/
Logo SST - Silicon Storage Technology, Inc

SST89E58RD2-33-C-TQI Datasheet(HTML) 35 Page - Silicon Storage Technology, Inc

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Data Sheet
FlashFlex51 MCU
SST89E52RD2/RD / SST89E54RD2/RD / SST89E58RD2/RD
SST89V52RD2/RD / SST89V54RD2/RD / SST89V58RD2/RD
35
©2006 Silicon Storage Technology, Inc.
S71255-05-000
5/06
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.
FIGURE
4-1: Chip-Erase
4.2.4.2 Block-Erase
The Block-Erase command erases all bytes in one of the
two memory blocks (Block 0 or Block 1). The selection of
the memory block to be erased is determined by the
(SFAH[7]) of the SuperFlash Address Register. For
SST89x5xRD2/RD, if SFAH[7] = 0b, the primary flash
memory Block 0 is selected. If SFAH[7:4] = EH, the sec-
ondary flash memory Block 1 is selected. The Block-Erase
command sequence for SST89x5xRD2/RD is as follows:
FIGURE
4-2: Block-Erase
4.2.4.3 Sector-Erase
The Sector-Erase command erases all of the bytes in a
sector. The sector size for the flash memory blocks is 128
Bytes. The selection of the sector to be erased is deter-
mined by the contents of SFAH and SFAL.
FIGURE
4-3: Sector-Erase
Set-Up
MOV SFDT, #55H
Interrupt scheme
MOV SFCM, #81H
Polling scheme
MOV SFCM, #01H
INT1 interrupt
indicates completion
SFST[2] indicates
operation completion
IAP Enable
ORL SFCF, #40H
1255 F08.0
Set-Up
MOV SFDT, #55H
IAP Enable
ORL SFCF, #40H
OR
Interrupt scheme
MOV SFCM, #8DH
Polling scheme
MOV SFCM, #0DH
Erase Block 1
MOV SFAH, #F0H
Erase Block 0
MOV SFAH, #00H
INT1 interrupt
indicates completion
SFST[2] indicates
operation completion
1255 F09.0
Program sector address
MOV SFAH, #sector_addressH
MOV SFAL, #sector_addressL
Interrupt scheme
MOV SFCM, #8BH
Polling scheme
MOV SFCM, #0BH
INT1 interrupt
indicates completion
SFST[2] indicates
operation completion
1255 F10.0
IAP Enable
ORL SFCF, #40H


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