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M68ICS08GR bảng dữ liệu(PDF) 161 Page - Freescale Semiconductor, Inc

tên linh kiện M68ICS08GR
Giải thích chi tiết về linh kiện  M68HC08 Microcontrollers
PDF  408 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

M68ICS08GR bảng dữ liệu(HTML) 161 Page - Freescale Semiconductor, Inc

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Flash Memory
FLASH Mass Erase Operation
MC68HC908GR8 — Rev 4.0
Technical Data
MOTOROLA
Flash Memory
161
11.6 FLASH Mass Erase Operation
Use this step-by-step procedure to erase entire FLASH memory to read
as logic 1:
1. Set both the ERASE bit, and the MASS bit in the FLASH control
register.
2. Read from the FLASH block protect register.
3. Write any data to any FLASH address* within the FLASH memory
address range.
4. Wait for a time, tnvs (min. 10µs)
5. Set the HVEN bit.
6. Wait for a time, tMErase (min. 4ms)
7. Clear the ERASE bit.
8. Wait for a time, tnvhl (min. 100µs)
9. Clear the HVEN bit.
10. After a time, trcv (min. 1µs), the memory can be accessed again in
read mode.
* When in Monitor mode, with security sequence failed Monitor ROM (MON), write to the FLASH
block protect register instead of any FLASH address.
NOTE:
Programming and erasing of FLASH locations cannot be performed by
code being executed from the FLASH memory. While these operations
must be performed in the order shown, other unrelated operations may
occur between the steps.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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