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M32C/8B bảng dữ liệu(PDF) 334 Page - Renesas Technology Corp

tên linh kiện M32C/8B
Giải thích chi tiết về linh kiện  RENESAS MCU M16C FAMILY / M32C/80 SERIES
PDF  406 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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M32C/8B bảng dữ liệu(HTML) 334 Page - Renesas Technology Corp

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Under development
M32C/8B Group
23. Flash Memory
Preliminary specification
Specifications in this manual are tentative and subject to change.
REJ09B0450-0050 Rev.0.50 Oct 31, 2008
Page 317 of 385
(9) Read Protect Bit Status Command
The read protect bit status command reads a protect bit status of a given block.
Execute the read protect bit status command by the program placed in the RAM. By writing xx61h in the first
bus cycle and reading the protect bit address of the specified block in the second bus cycle, the protect bit status
of the block can be read by the bit 6 of the read data. When the bit 6 is 0 (protected), the flash memory is
protected by the specified protect bit; when the bit 6 is 1 (unprotected), the flash memory is not protected by the
specified protect bit. Figure 23.14 shows a flow chart of read protect bit status command. The flash memory
enters read protect bit status mode after this command is executed. A protect bit status can be read in succession
by reading a protect bit address.
Figure 23.14
Read Protect Bit Status Command
Start
End
Read the bit 6 of the read data
Write the command code xx61h
Read the protect bit address
Write command code to an even address.
Write by a program placed in the RAM.



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