Bhg2 (07.11.2005 13:30, просмотров: 1) ответил zlogic на Вот такая история с ADuC847... Переехало с телесисов...
А на какой частоте ядрa у вас aduc847 пашет ? Если вдруг на максимально возможной, то проблемы могут быть из-за вот этого:
4. ADC Noise [er004]
Background: The ADuC845 incorporates two 24-bit ?-? ADCs, and the ADuC847 and ADuC848 incorporate a 24-bit and 16-bit ?-?
ADC, respectively. These ADCs are specified for typical noise performance as described in the relevant noise tables of the
data sheet.
Issue: ADC noise performance degrades when operating at maximum MCU clock frequency as determined via the CD bits in the
PLLCON SFR.
Workaround: For the duration of an ADC conversion, the CD bits should be set to 0x3 or greater.
Note that the default CD setting is 0x3.
Related Issues: None.
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