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MT49H8M36 Datasheet(PDF) 11 Page - Micron Technology |
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MT49H8M36 Datasheet(HTML) 11 Page - Micron Technology |
11 / 49 page PDF: 09005aef80a41b46/Source: 09005aef809f284b Micron Technology, Inc., reserves the right to change products or specifications without notice. MT49H8M36_2.fm - Rev. H 8/05 EN 11 ©2002 Micron Technology, Inc. All rights reserved. 288Mb: x36, x18, x9 2.5V VEXT, 1.8V VDD, HSTL, RLDRAM II Commands Commands According to the functional signal description, the following command sequences are possible. All input states or sequences not shown are illegal or reserved. All command and address inputs must meet setup and hold times around the rising edge of CK. Notes: 1. X = “Don’t Care” H = logic HIGH L = logic LOW A = valid address BA = valid bank address. 2. Only A(17:0) are used for the MRS command. 3. See Table 6. VDDQ Supply DQ power supply: Nominally, 1.5V or 1.8V. Isolated on the device for improved noise immunity. See Table 22 on page 44 for range. VSS Supply Ground. VSSQ Supply DQ ground: Isolated on the device for improved noise immunity. VTT Supply Power supply: Isolated termination supply. Nominally, VDDQ/2. See Table 22 on page 44 for range. NF – No function: These balls may be connected to ground. DNU – Do not use: These balls may be connected to ground. Table 6: Address Widths at Different Burst Lengths Burst Length Configuration x36 x18 x9 BL = 2 18:0 19:0 20:0 BL = 4 17:0 18:0 19:0 BL = 8 NA 17:0 18:0 Table 7: Command Table Note 1 Operation Code CS# WE# REF# A[20:0] B[2:0] Notes Device DESELECT/No Operation DESEL/NOP H XXXX MRS: Mode Register Set MRS LLL OPCODE X 2 READ READ L H H A BA 3 WRITE WRITE L L H A BA 3 AUTO REFRESH AREF L H L X BA Table 5: Ball Descriptions (continued) Symbol Type Description |
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