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CYDMX128B16 Datasheet(PDF) 6 Page - Cypress Semiconductor |
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CYDMX128B16 Datasheet(HTML) 6 Page - Cypress Semiconductor |
6 / 25 page CYDMX256A16, CYDMX256B16 CYDMX128A16, CYDMX128B16 CYDMX064A16, CYDMX064B16 Document #: 001-08090 Rev. *G Page 6 of 25 Architecture The CYDMX256A16, CYDMX128A16, CYDMX064A16, CYDMX256B16, CYDMX128B16, and CYDMX064B16 consist of an array of 16K, 8K, and 4K words of 16 dual-ported SRAM cells, IO, address lines, and control signals (CS#, ADV#, OE#, and WE#). Between the two access ports, one is a dedicated time multiplexed address and data interface; the other is a pin selectable port to either standard SRAM or time multiplexed address and data interface. Independent control signals for each port permit simultaneous access to any location in memory. To handle the situation of writing and reading to the same location, a BUSY# pin is provided on each port. For port to port communication, an Interrupt (INT#) pin is also available on each port. Table 1. ADM Interface Read/Write with Byte Select Operations ADV# CS# WE# OE# UB# LB# IO0 - IO15 Mode X H X X X X High Z Deselected or power down X X X H X X High Z Output disable XXXX H H High Z Upper and lower byte deselected Pulse L H L L L Data Out (IO0-IO15) Read upper and lower bytes Pulse L H L H L Data Out (IO0-IO7) High Z (IO8-IO15) Read lower byte only Pulse L H L L H High Z (IO0-IO7) Data Out (IO8-IO15) Read upper byte only Pulse L L X L L Data In (IO0-IO15) Write upper and lower bytes Pulse L L X H L Data In (IO0-IO7) High Z (IO8-IO15) Write lower byte only Pulse L L X L H High Z (IO0-IO7) Data In (IO8-IO15) Write upper byte only Table 2. Standard SRAM Interface Read/Write with Byte Select Operations CS# WE# OE# UB# LB# IO0-IO15 Mode H X X X X High Z Deselected or power down X X H X X High Z Output disable X X X H H High Z Upper and lower byte deselected L H L L L Data Out (IO0-IO15) Read upper and lower bytes L H L H L Data Out (IO0-IO7) High Z (IO8-IO15) Read lower byte only L H L L H High Z (IO0-IO7) Data Out (IO8-IO15) Read upper byte only L L X L L Data In (IO0-IO15) Write upper and lower bytes L L X H L Data In (IO0-IO7) High Z (IO8-IO15) Write lower byte only L L X L H High Z (IO0-IO7) Data In (IO8-IO15) Write upper byte only [+] Feedback |
Similar Part No. - CYDMX128B16 |
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Similar Description - CYDMX128B16 |
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