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CY7C006A-20AC Fiches technique(PDF) 16 Page - Cypress Semiconductor |
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CY7C006A-20AC Fiches technique(HTML) 16 Page - Cypress Semiconductor |
16 / 22 page CY7C006A Document Number: 38-06045 Rev. *G Page 16 of 22 Non-Contending Read/Write Inputs Outputs CE R/W OE SEM I/O0–I/O8 Operation H X X H High Z Deselected: Power-Down H H L L Data Out Read Data in Semaphore Flag X X H X High Z I/O Lines Disabled H X L Data In Write into Semaphore Flag L H L H Data Out Read L L X H Data In Write L X X L Not Allowed Interrupt Operation Example (Assumes BUSYL = BUSYR = HIGH) Left Port Right Port Function R/WL CEL OEL A0L–14L INTL R/WR CER OER A0R–14R INTR Set Right INTR Flag L L X 3FFF XXX X X L[37] Reset Right INTR Flag X X X X X X L L 3FFF H[38] Set Left INTL Flag XXX X L[38] LL X 3FFE X Reset Left INTL Flag X L L 3FFE H[37] X X XXX Semaphore Operation Example Function I/O0–I/O8 Left I/O0–I/O8Right Status No action 1 1 Semaphore free Left port writes 0 to semaphore 0 1 Left Port has semaphore token Right port writes 0 to semaphore 0 1 No change. Right side has no write access to semaphore Left port writes 1 to semaphore 1 0 Right port obtains semaphore token Left port writes 0 to semaphore 1 0 No change. Left port has no write access to semaphore Right port writes 1 to semaphore 0 1 Left port obtains semaphore token Left port writes 1 to semaphore 1 1 Semaphore free Right port writes 0 to semaphore 1 0 Right port has semaphore token Right port writes 1 to semaphore 1 1 Semaphore free Left port writes 0 to semaphore 0 1 Left port has semaphore token Left port writes 1 to semaphore 1 1 Semaphore free Notes 37. If BUSYL = L, then no change. 38. If BUSYR = L, then no change. |
Numéro de pièce similaire - CY7C006A-20AC |
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Description similaire - CY7C006A-20AC |
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