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UPD45128841 数据表(PDF) 19 Page - NEC |
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UPD45128841 数据表(HTML) 19 Page - NEC |
19 / 92 page Data Sheet M12650EJBV0DS00 19 µµµµPD45128441, 45128841, 45128163 4.5 Command Truth Table for CKE Current State CKE /CS /RAS /CAS /WE Address Action Notes n – 1 n Self refresh H ×××× × × INVALID, CLK (n – 1) would exit self refresh LH H ×× × × Self refresh recovery LH LH H ×× Self refresh recovery LH LH L ×× ILLEGAL LH L L ×× × ILLEGAL LL ××× × × Maintain self refresh Self refresh recovery H H H ×× × × Idle after tRC HH L H H ×× Idle after tRC HH L H L ×× ILLEGAL HH L L ×× × ILLEGAL HL H ×× × × ILLEGAL HL L H H ×× ILLEGAL HL L H L ×× ILLEGAL H LLL ×× × ILLEGAL Power down H ×××× × INVALID, CLK (n – 1) would exit power down LH H ×× × × EXIT power down → Idle LH LH H H × EXIT power down → Idle LL ××× × × Maintain power down mode All banks idle H H H ×× × Refer to operations in Operative Command Table HH L H ×× Refer to operations in Operative Command Table HH L L H × Refer to operations in Operative Command Table H H LLL H × CBR (auto) Refresh H H L L L L Op-Code Refer to operations in Operative Command Table HL H ×× × Refer to operations in Operative Command Table HL L H ×× Refer to operations in Operative Command Table H LLL H × Refer to operations in Operative Command Table H LLLL H × Self refresh 1 H LLLL L Op-Code Refer to operations in Operative Command Table L ×××× × × Power down 1 Row active H ×××× × × Refer to operations in Operative Command Table L ×××× × × Power down 1 Any state other than H H ××× × Refer to operations in Operative Command Table listed above H L ××× × × Begin clock suspend next cycle 2 LH ××× × × Exit clock suspend next cycle LL ××× × × Maintain clock suspend Notes 1. Self refresh can be entered only from the all banks idle state. Power down can be entered only from all banks idle or row active state. 2. Must be legal command as defined in Operative Command Table. Remark H = High level, L = Low level, × = High or Low level (Don't care) |
类似零件编号 - UPD45128841 |
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类似说明 - UPD45128841 |
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