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Register one! Supported MCUs. If you want to receive reply notifications by e-mail, please log in. Writing at91sam7 twi and bit data is not allowed and may lead to unpredictable data corruption.

Once the current command is achieved, then the FRDY flag is automatically set. Command State Chart.

The Flash technology requires that an erase must be done before programming. Step 1. Step 2. Step 3. After programming, the page the whole lock region can be locked to prevent miscellaneous write at91sam7 twi erase sequences. The lock bit at91sam7 twi be automatically set after page programming using WPL.

Data at91sam7 twi be written are stored in an internal latch buffer. The size of the latch buffer corresponds to the page size.

AT91SAM7S datasheet

The latch buffer wraps around within the internal memory area address space and appears to be repeated by the number of pages in it. Note: Writing of 8-bit and bit data is not allowed and may lead to unpredictable data corruption. A command must be previously run to unlock the corresponding region. The erase command has been refused and no page has been erased. A Clear Lock Bit command must be executed at91sam7 twi to unlock the corresponding lock regions. This defines lock regions in the embedded Flash at91sam7 twi plane. After production, the device may have some embedded Flash lock regions locked.


These locked regions are reserved for a default application. Refer to the product definition section for the default at91sam7 twi Flash mapping.

Locked sectors can be unlocked to be erased and then pro- grammed with another application or other data. It is possible to clear lock bits that were set previously. Then the locked region can be erased or programmed. These general-purpose bits are dedicated to protect other parts of the product. They can be set activated at91sam7 twi cleared individually.

Twi or I2C example - Welcome to AT91SAM Community Discussions

Refer to the prod- uct definition section for the general-purpose NVM bit action. It is possible to deactivate a general-purpose NVM bit set previously. In this case, the full memory plane is erased and all lock and at91sam7 twi NVM bits are cleared. When writing the rest of the Flash, this field defines at91sam7 twi number of Master Clock cycles in 1. This number must be rounded up. Warning: The value 0 is only allowed for a master clock period superior to 30 microseconds.Hello.

Welcome to AT91SAM Community Discussions

I have some probloems with my AT91 and a fram i connected via the TWI. I am using the sample code from the atmel-homepage. I'm confused at91sam7 twi pins to use for TWI (I2C) on the AT91SAM7S.

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