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IDT70V24L35GI Datasheet(PDF) 4 Page - Integrated Device Technology |
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IDT70V24L35GI Datasheet(HTML) 4 Page - Integrated Device Technology |
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4 / 22 page  6.42 IDT70V24S/L High-Speed 4K x 16 Dual-Port Static RAM Industrial and Commercial Temperature Ranges 4 Truth Table I: Non-Contention Read/Write Control Truth Table II: Semaphore Read/Write Control(1) NOTE: 1. A0L — A11L ≠ A0R — A11R NOTE: 1. There are eight semaphore flags written to via I/O0 and read from all of the I/O's (I/O0-I/O15). These eight semaphores are addressed by A0-A2. Inputs(1) Outputs Mode CE R/ W OE UB LB SEM I/O8-15 I/O0-7 H X X X X H High-Z High-Z Deselected: Power Down X X X H H H High-Z High-Z Both Bytes Deselected LL X L H H DATAIN High-Z Write to Upper Byte Only L L X H L H High-Z DATAIN Write to Lower Byte Only LL X L L H DATAIN DATAIN Write to Both Bytes L H LLH H DATAOUT High-Z Read Upper Byte Only LH LH LH High-Z DATAOUT Read Lower Byte Only LH L L LH DATAOUT DATAOUT Read Both Bytes X X H X X X High-Z High-Z Outputs Disabled 2911 tbl 02 Inputs Outputs Mode CE R/ W OE UB LB SEM I/O8-15 I/O0-7 HH L X X L DATAOUT DATAOUT Read Data in Semaphore Flag XH L H H L DATAOUT DATAOUT Read Data in Semaphore Flag H ↑ XXX L DATAIN DATAIN Write DIN0 into Semaphore Flag X ↑ XH H L DATAIN DATAIN Write DIN0 into Semaphore Flag L X XL XL ____ ____ Not Allowed LX X X L L ____ ____ Not Allowed 2911 tbl 03 |
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