AN211
Rev 0.5 | 18/24
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This value determines the the IAP space size. Users can also change the IAP space size by changing the register IAPLB in the
program (IAP start address = IAPLB*256, IAPLB must be even).
2. The Chip provides 16 K Flash
。
The space near to 0x0000 address is for user AP program, near to 0x3FFF (ie 16K) address is
for ISP code and the space between the 2 spaces is for IAP (including IAP (data), serial number and IAP space). Pleas make
sure the 3 spaces setting are not overlapped (Note that the minimum unit of Flash area division is a sector, which is 512 bytes).
3. If the contents of IAP (Data) and Serial Number are not changed after programming, it is highly recommended not put them
into the same sector with IAP Space. Otherwise, when IAP is erased in the program, IAP (data) and serial number will also be
erased. Suggest put them between tje AP (program) space and IAP space space.
Firmware upgrading
When the following message shows up that means the U1 writer needs to be updated firmware. Please make sure the USB cable
should
NOT
unplug during the updating process. Otherwise, The U1 writer will cause unrecoverable damaged.
Figure 24. Firmware Upgrading Warning
