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MC146805E2P Datenblatt(PDF) 11 Page - InnovASIC, Inc |
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MC146805E2P Datenblatt(HTML) 11 Page - InnovASIC, Inc |
11 / 33 page IA6805E2 29 August 2007 Microprocessor Unit As of Production Version 00 I_CC <= 1 SP <= $007F DDRs <= 0 CLR IRQ_N LOGIC TIMER <= $FF PRESCALER <= $7F TCR <= $7f FETCH INSTRUCTION PUT 1FFE,1FFF ON ADDRESS BUS RESET LOAD PC FROM 1FFE/1FFF EXECUTE ALL INSTRUCTION CYCLES CLEAR IRQ_N REQUEST LATCH LOAD PC FROM: SWI: 1FFC/1FFD IRQ_N: 1FFA/1FFB TIMER: 1FF8/1FF9 TIMER WAIT:1FF6/ 1FF7 I <= 1 STACK PC, X, A, CC PC+1=>PC IN RESET ? I BIT ? IRQ_N EDGE ? IS FETCHED INSTRUCTION AN SWI? TCR6=0 AND TCR7=1? RESET_N PIN = LOW RESET_N PIN = LOW SWI TIMER IRQ_N Y Y Y Y N N N N SET CLEAR Figure 8. Reset and Interrupt Processing Flowchart Copyright © 2007 IA211081401-03 www.Innovasic.com Customer Support: Page 11 of 33 1-888-824-4184 © |
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