SST89V58RD Silicon Storage Technology, SST89V58RD Datasheet - Page 35

• Manufacturer Part Number: SST89V58RD
• Description: FlashFlex51 MCU
• Manufacturer: Silicon Storage Technology

www.DataSheet4U.com
FlashFlex51 MCU
SST89E52RD2/RD / SST89E54RD2/RD / SST89E58RD2/RD
SST89V52RD2/RD / SST89V54RD2/RD / SST89V58RD2/RD
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.
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:
©2006 Silicon Storage Technology, Inc.
FIGURE
operation completion
MOV SFCM, #01H
SFST[2] indicates
Polling scheme
4-1: Chip-Erase
MOV SFDT, #55H
ORL SFCF, #40H
IAP Enable
Set-Up
indicates completion
MOV SFCM, #81H
Interrupt scheme
INT1 interrupt
1255 F08.0
35
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
FIGURE
operation completion
operation completion
MOV SFCM, #0DH
MOV SFCM, #0BH
MOV SFAH, #00H
SFST[2] indicates
SFST[2] indicates
Polling scheme
Polling scheme
Erase Block 0
4-2: Block-Erase
4-3: Sector-Erase
MOV SFAH, #sector_addressH
MOV SFAL, #sector_addressL
Program sector address
ORL SFCF, #40H
MOV SFDT, #55H
ORL SFCF, #40H
IAP Enable
IAP Enable
Set-Up
OR
indicates completion
indicates completion
MOV SFCM, #8DH
MOV SFCM, #8BH
MOV SFAH, #F0H
Interrupt scheme
Interrupt scheme
Erase Block 1
INT1 interrupt
INT1 interrupt
S71255-05-000
Data Sheet
1255 F09.0
1255 F10.0
5/06