W949D6CB Datasheet, PDF (4/60 Pages) Winbond – 512Mb Mobile LPDDR

W949D6CB / W949D2CB
1. GENERAL DESCRIPTION
512Mb Mobile LPDDR
W949D6CB / W949D2CB is a high-speed Low Power double data rate synchronous dynamic random access
memory (LPDDR SDRAM), An access to the LPDDR SDRAM is burst oriented. Consecutive memory location in one
page can be accessed at a burst length of 2, 4, 8 and 16 when a bank and row is selected by an ACTIVE command.
Column addresses are automatically generated by the LPDDR SDRAM internal counter in burst operation. Random
column read is also possible by providing its address at each clock cycle. The multiple bank nature enables
interleaving among internal banks to hide the pre-charging time. By setting programmable Mode Registers, the
system can change burst length, latency cycle, interleave or sequential burst to maximize its performance. The
device supports low power functions such as Partial Array Self Refresh (PASR) and Automatic Temperature
Compensated Self Refresh (ATCSR).
2. FEATURES
VDD = 1.7~1.95V
VDDQ = 1.7~1.95V;
Data width: x16 / x32
Clock rate: 200MHz(-5),166MHz (-6) ,133MHz (-75)
Partial Array Self-Refresh(PASR)
Auto Temperature Compensated Self-Refresh(ATCSR)
Power Down Mode
Deep Power Down Mode (DPD Mode)
Programmable output buffer driver strength
Four internal banks for concurrent operation
Data mask (DM) for write data
Clock Stop capability during idle periods
Auto Pre-charge option for each burst access
Double data rate for data output
Differential clock inputs (CK and CK )
Bidirectional, data strobe (DQS)
CAS Latency: 2 and 3
Burst Length: 2, 4, 8 and 16
Burst Type: Sequential or Interleave
64 ms Refresh period
Interface: LVCMOS compatible
Support package:
60 balls BGA (x16)
90 balls BGA (x32)
Operating Temperature Range :
Extended (-25°C ~ +85°C)
Industrial (-40°C ~ +85°C)
Publication Release Date: Sep, 21, 2011
-4-
Revision A01-007