参数资料
型号: SAF-XC866-2FRA
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 26.7 MHz, MICROCONTROLLER, PDSO38
封装: PLASTIC, GREEN, TSSOP-38
文件页数: 57/116页
文件大小: 1640K
代理商: SAF-XC866-2FRA
XC866
Functional Description
Data Sheet
41
V1.2, 2007-10
3.3.2
Flash Programming Width
For the P-Flash banks, a programmed wordline (WL) must be erased before it can be
reprogrammed as the Flash cells can only withstand one gate disturb. This means that
the entire sector containing the WL must be erased since it is impossible to erase a
single WL.
For the D-Flash bank, the same WL can be programmed twice before erasing is required
as the Flash cells are able to withstand two gate disturbs. Hence, it is possible to
program the same WL, for example, with 16 bytes of data in two times (see Figure 12).
Figure 12
D-Flash Programming
Note: When programming a D-Flash WL the second time, the previously programmed
Flash memory cells (whether 0s or 1s) should be reprogrammed with 0s to retain
its original contents and to prevent “over-programming”.
0000 ….. 0000
H
0000 ….. 0000
H
32 bytes (1 WL)
1111 ….. 1111
H
0000 ….. 0000
H
16 bytes
0000 ….. 0000
H
1111 ….. 1111
H
Flash memory cells
32-byte write buffers
1111 ….. 0000
H
1111 ….. 1111
H
0000 ….. 0000
H
1111 ….. 0000
H
Program 1
Program 2
Note: A Flash memory cell can be programmed
from 0 to 1, but not from 1 to 0.
相关PDF资料
PDF描述
SAF-XC866-2RRI 8-BIT, FLASH, 26.7 MHz, MICROCONTROLLER, PDSO38
SAF-XC866-4FRA3V 8-BIT, FLASH, 26.7 MHz, MICROCONTROLLER, PDSO38
SAF-XC866-4FRA 8-BIT, FLASH, 26.7 MHz, MICROCONTROLLER, PDSO38
SAK-XC866-2FRI3V 8-BIT, FLASH, 26.7 MHz, MICROCONTROLLER, PDSO38
SAK-XC866-4FRI3V 8-BIT, FLASH, 26.7 MHz, MICROCONTROLLER, PDSO38
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