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EM6AA160TSC-4G Datasheet(PDF) 4 Page - Etron Technology, Inc. |
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EM6AA160TSC-4G Datasheet(HTML) 4 Page - Etron Technology, Inc. |
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4 / 63 page  EtronTech EM6AA160 Etron Confidential 4 Rev. 1.3 Mar. /2014 Pin Descriptions Table 2. Pin Details of EM6AA160 Symbol Type Description CK, CK Input Differential Clock: CK, CK are driven by the system clock. All SDRAM input signals are sampled on the positive edge of CK. Both CK and CK increment the internal burst counter and controls the output registers. CKE Input Clock Enable: CKE activates (HIGH) and deactivates (LOW) the CK signal. If CKE goes low synchronously with clock, the internal clock is suspended from the next clock cycle and the state of output and burst address is frozen as long as the CKE remains low. When all banks are in the idle state, deactivating the clock controls the entry to the Power Down and Self Refresh modes. BA0, BA1 Input Bank Activate: BA0 and BA1 define to which bank the BankActivate, Read, Write, or BankPrecharge command is being applied. A0-A12 Input Address Inputs: A0-A12 are sampled during the BankActivate command (row address A0-A12) and Read/Write command (column address A0-A8 with A10 defining Auto Precharge). CS Input Chip Select: CS enables (sampled LOW) and disables (sampled HIGH) the command decoder. All commands are masked when CS is sampled HIGH. CS provides for external bank selection on systems with multiple banks. It is considered part of the command code. RAS Input Row Address Strobe: The RAS signal defines the operation commands in conjunction with the CAS and WE signals and is latched at the positive edges of CK. When RAS and CS are asserted "LOW" and CAS is asserted "HIGH," either the BankActivate command or the Precharge command is selected by the WE signal. When the WE is asserted "HIGH," the BankActivate command is selected and the bank designated by BA is turned on to the active state. When the WE is asserted "LOW," the Precharge command is selected and the bank designated by BA is switched to the idle state after the precharge operation. CAS Input Column Address Strobe: The CAS signal defines the operation commands in conjunction with the RAS and WE signals and is latched at the positive edges of CK. When RAS is held "HIGH" and CS is asserted "LOW," the column access is started by asserting CAS "LOW." Then, the Read or Write command is selected by asserting WE "HIGH" or “LOW”. WE Input Write Enable: The WE signal defines the operation commands in conjunction with the RAS and CAS signals and is latched at the positive edges of CK. The WE input is used to select the BankActivate or Precharge command and Read or Write command. LDQS, UDQS Input / Output Bidirectional Data Strobe: Specifies timing for Input and Output data. Read Data Strobe is edge triggered. Write Data Strobe provides a setup and hold time for data and DQM. LDQS is for DQ0~7, UDQS is for DQ8~15. LDM, UDM Input Data Input Mask: Input data is masked when DM is sampled HIGH during a write cycle. LDM masks DQ0-DQ7, UDM masks DQ8-DQ15. DQ0 - DQ15 Input / Output Data I/O: The DQ0-DQ15 input and output data are synchronized with positive and negative edges of LDQS and UDQS. The I/Os are byte-maskable during Writes. |
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