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AS8267 bảng dữ liệu(PDF) 86 Page - ams AG

tên linh kiện AS8267
Giải thích chi tiết về linh kiện  Single-Phase 2-Current Energy Measurement Integrated Circuits with Microcontroller, RTC, Programmable Multi-Purpose I/Os
PDF  136 Pages
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nhà sản xuất  AMSCO [ams AG]
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AS8267 bảng dữ liệu(HTML) 86 Page - ams AG

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Data Sheet AS8267 / AS8268
Revision 1.0, 19-Jun-07
Page 86 of 136
General Description
Based on the software development flow it only makes sense to lock the software after the development is
finished. Therefore we can distinguish between access to the Flash during the software development and
access to the Flash after the development is finished.
The protection is implemented in such a way that the external Flash memory access (UART1, SPI via
SPI_Flash) is blocked.
Access during Software Development
During the development phase of the meter software each external access to the Flash must be enabled.
This means that the listed commands are enabled
READ
WRITE Byte
WRITE Page
PAGE ERASE
MASS ERASE
Access after Software Development
After the completion of the software development there are two possible modes of protecting the Flash content.
a) Protection via PASSWORD
If this mode is selected the listed commands are disabled:
READ
WRITE Byte
WRITE Page
PAGE ERASE
MASS ERASE
b) Protection via PASSWORD and ATTACK COUNTER
If this mode is selected the listed commands are disabled and the Attack Counter is enabled:
READ
WRITE Byte
WRITE Page
PAGE ERASE
MASS ERASE



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