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IDT70P35L25BY Datasheet(PDF) 8 Page - Integrated Device Technology |
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IDT70P35L25BY Datasheet(HTML) 8 Page - Integrated Device Technology |
8 / 22 page 6.42 IDT70P35/34L(IDT70P25/24L) ADVANCED High-Speed 1.8V 8/4K x 18 (8/4K x 16) Dual-Port Static RAM Industrial and Commercial Temperature Ranges 8 Truth Table I: Non-Contention Read/Write Control NOTE: 1. A0L — A12L ≠ A0R — A12R for IDT70P35 and IDT70P25; A0L — A11L ≠ A0R — A11R for IDT70P34 and IDT70P24. 2. Outputs for IDT70P25/24 are I/O0x - I/O7x. 3. Outputs for IDT70P25/24 are I/O8x - I/O15x. Inputs(1) Outputs Mode CE R/W OE UB LB SEM I/O9-17(3) I/O0-8(2) 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 LL 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 L H 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 5683 tbl 02 Truth Table II: Semaphore Read/Write Control(1) NOTE: 1. There are eight semaphore flags written to via I/O0 and read from all of the I/O's (I/O0-I/O17 for IDT70P35/34 and I/O0-I/O15 for IDT70P25/24). These eight semaphores are addressed by A0-A2. Inputs Outputs Mode CE R/W OE UB LB SEM I/O9-17(1) I/O0-8(1) HHL X X L DATAOUT DATAOUT Read Data in Semaphore Flag XH L H H L DATAOUT DATAOUT Read Data in Semaphore Flag H ↑ XX X 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 5683 tbl 03 |
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