AS4C64M8D2
Bidirectional Data Strobe:
DQS,
Input /
Output
Output with read data, input with write data for source synchronous operation. Edge-
aligned with read data, center-aligned with write data. DQS# is only used when
differential data strobe mode is enabled via the LOAD MODE command.
DQS#
Data Input Mask:
DM
Input
DM is an input mask signal for write data. Input data is masked when DM is sampled
HIGH along with that input data during a WRITE access.
DQ0 – DQ7 Input /
Data I/O:
Output
Bi-directional data bus.
On Die Termination:
ODT
Input
ODT enables internal termination resistance. It is applied to each DQ, DQS/DQS# and
DM signal. The ODT pin is ignored if the EMR (1) is programmed to disable ODT.
VDD
VSS
Supply
Supply
Supply
Supply
Supply
Supply
Supply
-
Power Supply: +1.8V 0.1V
Ground
VDDL
VSSDL
VDDQ
VSSQ
VREF
NC
DLL Power Supply: +1.8V 0.1V
DLL Ground
DQ Power: +1.8V 0.1V.
DQ Ground
Reference Voltage for Inputs: +0.5*VDDQ
No Connect: These pins should be left unconnected.
Confidential
6
Rev. 1.0
Feb. /2014
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
