How does the Enhanced Mini-ACE™’s RT global circular buffer option operate?
A. The RT Global Circular Buffer is a programmable option for any subset of the 30 receive(/broadcast) and/or 30 broadcast subaddresses. The size of the global circular buffer is programmable by means of bits 11, 10, and 9 of Configuration Register #6. To enable received words for a particular receive(/broadcast) subaddress to be stored to the global circular buffer, it is necessary to program bits 15, 7, 6, and 5 of the respective subaddress control word to values of logic “1”. If SEPARATE BROADCAST DATA is enabled (bit 0 of Configuration Register #2 = logic “1”), then to enable received words for a particular broadcast subaddress to be stored to the global circular buffer, it is necessary to program bits 15, 2, 1, and 0 of the respective subaddress control word to logic “1”. The pointer to the RT circular buffer is stored in location 101 (if area A is the currently active area, per CURRENT AREA B/A*, bit 13 of Configuration Register #1) or 105 (if area B is the currently active area)
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