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M68HC08 bảng dữ liệu(PDF) 63 Page - Freescale Semiconductor, Inc

tên linh kiện M68HC08
Giải thích chi tiết về linh kiện  MC68HC908JB16 Technical Data
PDF  332 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
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M68HC08 bảng dữ liệu(HTML) 63 Page - Freescale Semiconductor, Inc

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FLASH Memory
MC68HC908JB16 — Rev. 1.1
Technical Data
Freescale Semiconductor
FLASH Memory
63
4.6 FLASH Mass Erase Operation
Use the following procedure to erase the entire FLASH memory:
1. Set both the ERASE bit and the MASS bit in the FLASH control
register.
2. Write any data to any FLASH address within the address range
$FFD0–$FFFF.
3. Wait for a time, tnvs (5µs).
4. Set the HVEN bit.
5. Wait for a time tMErase (200ms).
6. Clear the ERASE bit.
7. Wait for a time, tnvhl (100µs).
8. Clear the HVEN bit.
9. After time, trcv (1µs), the memory can be accessed in read mode
again.
NOTE:
Programming and erasing of FLASH locations cannot be performed by
executing code from the FLASH memory; the code must be executed
from RAM. While these operations must be performed in the order as
shown, but other unrelated operations may occur between the steps.



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