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ST75C530 датащи(PDF) 62 Page - STMicroelectronics |
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ST75C530 датащи(HTML) 62 Page - STMicroelectronics |
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62 / 84 page ![]() SINTR 0 1 2 3 4 5 6 0 1 2 3 4 5 6 7 R S Q (Rx buffer filled) ITRES 3 (write only) R S Q (Tx buffer emptied) ITRES 2 (write only) From ST75C540 DSP ITSRCR (read only) ITMASK (read write) Figure 24 No Yes =0 No Yes RETURN IT READ ITSRCR MASK UNWANTED BITS BIT 2 = 1 EXECUTE IT_TRANSMIT WRITE 00 INTO ITRES2 No Yes BIT 3 = 1 EXECUTE IT_RECEIVE WRITE 00 INTO ITRES3 (Other Interrupts) Execute Tx Buffer Management Reset IT2 Execute Rx Buffer Management Reset IT3 If all sources served return from interrupt Check only the Interrupt sources that we want to manage under Interrupt Figure 25 X - PARALLEL DATA EXCHANGE (continued) ST75C530 - ST75C540 62/84 |
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