AT32UC3L064-D3HES ATMEL [ATMEL Corporation], AT32UC3L064-D3HES Datasheet - Page 258

Manufacturer Part Number

AT32UC3L064-D3HES

Manufacturer

ATMEL [ATMEL Corporation]

32099D–06/2010

Synchronization

As the prescaler and counter operate asynchronously from the user interface, the AST needs a

few clock cycles to synchronize the values written to the CR, CV, SCR, WER, EVE, EVD, PIRn,

ARn, and DTR registers. The Busy bit in the Status Register (SR.BUSY) indicates that the syn-

chronization is ongoing. During this time, writes to these registers will be discarded.

Note that synchronization takes place also if the prescaler is clocked from CLK_AST.

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