AS8267 datasheet(86/136 Pages) AMSCO

Part #	AS8267

Description	Single-Phase 2-Current Energy Measurement Integrated Circuits with Microcontroller, RTC, Programmable Multi-Purpose I/Os

PDF	136 Pages

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Manufacturer	AMSCO [ams AG]

Direct Link	http://www.ams.com

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86 / 136 page

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

AS8267 Datasheet(PDF) 86 Page - ams AG