AS4SD16M72PBG-s/IT,ET,XT
16M x 72, SDR SDRAM, 3.3v Core/ 3.3v IO
Pin Descriptions
BGA Locations
F4, F16,
L2, L13,
SYMBOL
CKx
DESCRIPTION
Clock: CKx is the clock input. All address and
control input signals are sampled on the crossing of the positive
edge of CKx\. Output data (DQ's and
DQS) is referenced to rising edge of CLKx
G4, G16, K2, K13
M6
CKEx
Clock Enable: CKE controls the clock inputs. CKE high enables,
CKE Low disables the clock input pins. Driving CKE Low pro-
vides PRECHARGE POWER-DOWN and SELF REFRESH
operations, or ACT IVE POWER-DOWN. CKE is synchronous
for POWER-DOWN entry and exit, and for SELF REFRESH entry
CKE is Asynchronous for SELF REFRESH exit and for disabling
the outputs. CKE must be maintained HIGH throughout read and
write accesses. Input buffers are disabled during POWER-DOWN
Input buffers are disabled during SELF REFRESH.
G1, G13, K4, K16
M12
CSx\
Chip Select: CSx\ enagles the COMMAND register(s) of each of
the five (5) contained words. All commands are masked when CSx\
is registered HIGH. CSx\ provides for external bank selection
on systems with multiple banks. CSx\ is considered part of the
COMMAND CODE.
F4, F16, G5, G15,
K1, K12, L2, L13,
N7, M9
G4, G16, K2, K14
M7
RASx\, CASx\
WEx\
Command Inputs: RASx, CASx, and Wex\ define the command
being entered
DQMLx, DQMHx
Input Data Mask. DM is an input mask signal for write data.
Input data is masked when DQMLx or Hx is sampled HIGH at
time of a WRIT E access. DM is sampled on both edges of DQSLx
and DQSHx
E8, E9
BA0, BA1
Bank Address Inputs: BA0, BA1 define which bank an ACT IVE
READ, WRIT E, or PRECHARGE command is being applied
Address Input: Provide the row address for Active commands, and
the column address and auto precharge bit (A10) for READ/WRIT E
commands to select one location out of the memory array int the
respective bank. A10 sampled during a PRECHARGE command
determines whether the PRECHARGE applies to one bank or
all banks. T he address inputs also provide the op-code during
a MODE RESIST ER SET command.
A7, A8, A9, A10, B7 A0-A11, A12
B8, B9, B10, C7, C8
C9, C10, D7
Austin Semiconductor, Inc.
Proprietary Material
ASI Product Marketing
AUSTIN [ AUSTIN SEMICONDUCTOR ]
