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70V261L35PFG Datasheet(PDF) 3 Page - Integrated Device Technology |
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70V261L35PFG Datasheet(HTML) 3 Page - Integrated Device Technology |
3 / 17 page 6.42 IDT70V261S/L High-Speed 16K x 16 Dual-Port Static RAM with Interrupt Industrial and Commercial Temperature Ranges 3 Truth Table II: Semaphore Read/Write Control(1) Truth Table I: Non-Contention Read/Write Control NOTE: 1. A0L — A13L ≠ A0R — A13R NOTE: 1. There are eight semaphore flags written to via I/O0 and read from all 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 XXXX H High-Z High-Z Deselected: Power-Down X X X H H H High-Z High-Z Both Bytes Deselected: Power-Down LL X L H H DATAIN High-Z Write to Upper Byte Only LL X H L H High-Z DATAIN Write to Lower Byte Only LL X L L H DATAIN DATAIN Write to Both Bytes LH L L H H DATAOUT High-Z Read Upper Byte Only LH LH LH High-Z DATAOUT Read Lower Byte Only L H LLL H DATAOUT DATAOUT Read Both Bytes XX H XXX High-Z High-Z Outputs Disabled 3040 tbl 02 Inputs(1) Outputs Mode CE R/W OE UB LB SEM I/O8-15 I/O0-7 HHL X X L DATAOUT DATAOUT Read Data in Semaphore Flag XH LH H L DATAOUT DATAOUT Read Data in Semaphore Flag H ↑ XXX L DATAIN DATAIN Write I/O0 into Semaphore Flag X ↑ XH H L DATAIN DATAIN Write I/O0 into Semaphore Flag LX X L X L ____ ____ Not Allowed L XXX L L ____ ____ Not Allowed 3040 tbl 03 |
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