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FM22LD16-55-BG 数据表(PDF) 3 Page - Ramtron International Corporation |
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FM22LD16-55-BG 数据表(HTML) 3 Page - Ramtron International Corporation |
3 / 14 page FM22LD16 - 256Kx16 FRAM Rev. 1.0 Oct. 2008 Page 3 of 14 Functional Truth Table 1,2 /CE /WE A(17:2) A(1:0) Operation H X X X Standby/Idle ↓ H V V Read L H No Change Change Page Mode Read L H Change V Random Read ↓ L V V /CE-Controlled Write L ↓ V V /WE-Controlled Write 2 L ↓ No Change V Page Mode Write 3 ↑ X X X Starts Precharge Notes: 1) H=Logic High, L=Logic Low, V=Valid Data, X=Don’t Care. 2) /WE-controlled write cycle begins as a Read cycle and A(17:2) is latched then. 3) Addresses A(1:0) must remain stable for at least 10 ns during page mode operation. 4) For write cycles, data-in is latched on the rising edge of /CE or /WE, whichever comes first. Byte Select Truth Table /OE /LB /UB Operation H X X Read; Outputs Disabled X H H L H L Read; DQ(7:0) Hi-Z L H Read; DQ(15:8) Hi-Z L L Read X H L Write; Mask DQ(7:0) L H Write; Mask DQ(15:8) L L Write |
类似零件编号 - FM22LD16-55-BG |
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类似说明 - FM22LD16-55-BG |
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