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HYB25L256160AF-75 Datasheet(PDF) 9 Page - Infineon Technologies AG |
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HYB25L256160AF-75 Datasheet(HTML) 9 Page - Infineon Technologies AG |
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9 / 56 page  Data Sheet 9 Rev. 1.2, 04-2004 HY[B/E]25L256160AF–7.5 256MBit Mobile-RAM Pin Configuration Table 3 Input/Output Signals Pin Symbol Type Polarity Function F2 CLK Input Positive Edge Clock The system clock input. All of the SDRAM inputs are sampled on the rising edge of the clock. F3 CKE Input Active High Clock Enable CKE activates the CLK signal when high and deactivates the CLK signal when low, thereby initiates either the Power Down mode, Suspend mode, or the Self Refresh mode. G9 CS Input Active Low Chip Select CS enables the command decoder when low and disables the command decoder when high. When the command decoder is disabled, new commands are ignored but previous operations continue. F8 RAS Input Active Low Command Inputs Sampled at the rising edge of the clock, RAS, CAS, and WE (along with CS) define the command to be executed by the SDRAM. F7 CAS F9 WE G8 BA1 Input Active High Bank Address Inputs BA0 and BA1 define to which bank an Active, Read, Write or Precharge command is being applied. BA0 and BA1 also determine if the mode register or extended mode register is to be accessed during a MRS or EMRS cycle. G7 BA0 G1 A12 Input Active High Address Inputs During a Bank Activate command cycle, A12 - A0 define the row address (RA12 - RA0) when sampled at the rising clock edge. During a Read or Write command cycle, A8-A0 define the column address (CA8 - CA0) when sampled at the rising clock edge. In addition to the column address, A10/AP is used to invoke autoprecharge operation at the end of the burst read or write cycle. If AP is high, autoprecharge is selected and BA1, BA0 defines the bank to be precharged. If AP is low, autoprecharge is disabled. During a Precharge command cycle, AP is used in conjunction with BA1 and BA0 to control which bank(s) to precharge. If AP is high, all four banks will be precharged regardless of the state of BA0 and BA1. If AP is low, then BA1 and BA0 are used to define which bank to precharge. G2 A11 H9 A10/AP G3 A9 H1 A8 H2 A7 H3 A6 J2 A5 J3 A4 J7 A3 J8 A2 H8 A1 H7 A0 |
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