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HYE18M512160BF-6 Datasheet(PDF) 10 Page - Qimonda AG |
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HYE18M512160BF-6 Datasheet(HTML) 10 Page - Qimonda AG |
10 / 24 page Internet Data Sheet 10 Rev.1.80, 2006-11 07092007-3E44-UTNM HY[B/E]18M512160BF 512-Mbit DDR Mobile-RAM Functional Description 6) All states and sequences not shown are illegal or reserved. 7) Not bank-specific; requires that all banks are idle and no bursts are in progress. 8) Reads or Writes listed in the Command/Action column include Reads or Writes with Auto Precharge enabled and Reads or Writes with Auto Precharge disabled. 9) May or may not be bank-specific; if multiple banks are to be precharged, each must be in a valid state for precharging. 10) A WRITE command may be applied after the completion of the Read burst; otherwise, a BURST TERMINATE command must be used to end the Read burst prior to issuing a WRITE command. 11) Not bank-specific; BURST TERMINATE affects the most recent Read burst, regardless of bank. 12) Requires appropriate DM masking. Table 7 Current State Bank n - Command to Bank m (different bank) Current State CS RAS CAS WE Command / Action Notes Any H X X X DESELECT (NOP / continue previous operation) 1)2)3)4)5)6) 1) This table applies when CKEn-1 was HIGH and CKEn is HIGH (see Table 5) and after t XP or tXSR has been met (if the previous state was power-down or self refresh). 2) This table describes alternate bank operation, except where noted, i.e., the current state is for bank n and the commands shown are those allowed to be issued to bank m (assuming that bank m is in such a state that the given command is allowable). Exceptions are covered in the notes below. L H H H NO OPERATION (NOP / continue previous operation) 1) to 6) Idle XXXX Any command otherwise allowed to bank m 1) to 6) Row Activating, Active, or Precharging L L H H ACTIVE (select and activate row) 1) to 6) L H L H READ (select column and start Read burst) 1) to 7) L H L L WRITE (select column and start Write burst) 1) to 7) L L H L PRECHARGE (Deactivate row in bank or banks) 1) to 6) Read (Auto- Precharge Disabled) L L H H ACTIVE (select and activate row) 1) to 6) L H L H READ (truncate Read and start new Read burst) 1) to 7) L H L L WRITE (truncate Read and start Write burst) 1) to 8) L L H L PRECHARGE (Deactivate row in bank or banks) 1) to 6) Write (Auto- Precharge Disabled) L L H H ACTIVE (select and activate row) 1) to 6) L H L H READ (truncate Write and start Read burst) 1) to 7), 9) L H L L WRITE (truncate Write and start new Write burst) 1) to 7) L L H L PRECHARGE (Deactivate row in bank or banks) 1) to 6) Read (with Auto- Precharge) L L H H ACTIVE (select and activate row) 1) to 6) L H L H READ (truncate Read and start new Read burst) 1) to 7) L H L L WRITE (truncate Read and start Write burst) 1) to 8) L L H L PRECHARGE (deactivate row in bank or banks) 1) to 6) Write (with Auto- Precharge) L L H H ACTIVE (select and activate row) 1) to 6) L H L H READ (truncate Write and start Read burst) 1) to 7) L H L L WRITE (truncate Write and start new Write burst) 1) to 7) L L H L PRECHARGE (Deactivate row in bank or banks) 1) to 6) |
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