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CT2553 Datasheet(PDF) 7 Page - Aeroflex Circuit Technology |
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CT2553 Datasheet(HTML) 7 Page - Aeroflex Circuit Technology |
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7 / 36 page ![]() Aeroflex Circuit Technology 7 SCDCT2553 REV B 8/6/99 Plainview NY (516) 694-6700 Figure 6 – Use of Descriptor Stack – BC Mode * Note: STACK POINTERS and MESSAGE COUNTERS are switched via the CONFIGURATION REGISTER under external CPU control. ** Note: DESCRIPTOR STACKS and DATA BLOCKS have 256 word boundries which should be observed. Figure 7 – Use of Descriptor Stack – RTU Mode DESCRIPTOR ** STACKS STACK POINTERS CONFIGURATION REGISTER CURRENT AREA B/A DATA ** BLOCKS DATA BLOCK DATA BLOCK 0 13 15 BLOCK STATUS WORD RESERVED TIME TAG WORD MESSAGE BLOCK ADDR DESCRIPTOR ** STACKS STACK POINTERS CONFIGURATION REGISTER CURRENT AREA B/A DATA ** BLOCKS DATA BLOCK DATA BLOCK 0 13 15 LOOK-UP TABLE (DATA BLOCK ADDR) LOOK-UP TABLE ADDR BLOCK STATUS WORD RESERVED TIME TAG WORD RECEIVED COMMAND WORD * * MESSAGE COUNTER * * * Note: STACK POINTERS and LOOK-UP TABLE are switched via the CONFIGURATION REGISTER under external CPU control. ** Note: DESCRIPTOR STACKS and DATA BLOCKS have 256 word boundries which should be observed. |
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