Отправлено krupskij 21 июля 2004 г. 19:17 В ответ на: опять я про AD7715 отправлено Слон 21 июля 2004 г. 18:25

DRDY Logic Output. A logic low on this output indicates that a new output word is available from the
AD7715 data register. The DRDY pin will return high upon completion of a read operation of a full
output word. If no data read has taken place between output updates, the DRDY line will return
high for 500 ´ tCLKÊ IN cycles prior to the next output update. While DRDY is high, a read operation
should not be attempted or in progress to avoid reading from the data register as it is being updated.
The DRDY line will return low again when the update has taken place. DRDY is also used to indicate
when the AD7715 has completed its on-chip calibration sequence.

Собственно, поведение DRDY конечно кажется немного странным,
но оно не мешает обрабатывать прерывание "по фронту".