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参数资料
| 型号： | SST89V54RDA-33-C-QIF |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, QCC40 |
| 封装： | ROHS COMPLIANT, MO-220IWJJD-5, WQFN-40 |
| 文件页数： | 32/84页 |
| 文件大小： | 1755K |
| 代理商： | SST89V54RDA-33-C-QIF |
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38
Data Sheet
FlashFlex MCU
SST89E54RD2A/RDA / SST89E58RD2A/RDA
SST89V54RD2A/RDA / SST89V58RD2A/RDA
2007 Silicon Storage Technology, Inc.
S71339-01-000
1/07
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
SST89x5xRD2A/RDA, 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 SST89x5xRD2A/RDA is as fol-
lows:
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
1339 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
1339 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
1339 F10.0
IAP Enable
ORL SFCF, #40H
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相关代理商/技术参数 |
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| SST89V554 | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89V554-25-C-NI | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
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