 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
EM68C08CWAE-25IH Datasheet(PDF) 5 Page - Etron Technology, Inc. |
|
||||||||||||||||||||||||||||||
EM68C08CWAE-25IH Datasheet(HTML) 5 Page - Etron Technology, Inc. |
|
|
5 / 58 page  EtronTech EM68C08CWAE Rev. 1.1 5 Jul. /2014 Ball Descriptions Table 3. Ball Descriptions Symbol Type Description CK, CK# Input Differential Clock: CK, CK# are driven by the system clock. All SDRAM input signals are sampled on the crossing of positive edge of CK and negative edge of CK#. Output (Read) data is referenced to the crossings of CK and CK# (both directions of crossing). 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-BA2 Input Bank Address: BA0-BA2 define to which bank the BankActivate, Read, Write, or BankPrecharge command is being applied. A0-A13 Input Address Inputs: A0-A13 are sampled during the BankActivate command (row address A0-A13) and Read/Write command (column address A0-A9 with A10 defining Auto Precharge). A13 Row Address use on x8 components only. 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 crossing of positive edges of CK and negative edge 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 crossing of positive edges of CK and negative edge 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 crossing of positive edges of CK and negative edge of CK#. The WE# input is used to select the BankActivate or Precharge command and Read or Write command. DQS, DQS# RDQS RDQS# Input / Output Bidirectional Data Strobe: output with read data, input with write data. Edge aligned with read data, centered with write data. For the RDQS option using DM pin can be enabled via the EMR(1) to simplify read timing.The data strobes DQS and RDQS may be used in single ended mode or paired with the optional complementary signals DQS# and RDQS# to provide differential pair signaling to the system during both reads and writes. An EMRS (1) control bit enables or disables the complementary data strobe signals. DM Input Data Input Mask: Input data is masked when DM is sampled HIGH during a write cycle. x8 device, the function of DM or RDQS/RQDS# is enabled by EMRS command. DQ0 – DQ7 Input / Output Data I/O: Bi-directional data bus. ODT Input On Die Termination: ODT enables internal termination resistance. It is applied to each DQ, DQS/DQS#, RDQS/RDQS# and DM signal. The ODT pin is ignored if the EMR (1) is programmed to disable ODT. |
Similar Part No. - EM68C08CWAE-25IH |
|
Similar Description - EM68C08CWAE-25IH |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
