W948D6FBHX5E-TR Datasheet, PDF (7/60 Pages) Winbond – 256Mb Mobile LPDDR

W948D6FB / W948D2FB
256Mb Mobile LPDDR
SIGNAL NAME TYPE FUNCTION
DESCRIPTION
CKE
LDQS, UDQS
(x16);
DQS0~DQS3
(x32)
VDD
Input
I/O
Supply
Clock Enable
Data Strobe
Power
CKE HIGH activates, and CKE LOW deactivates internal clock
signals, and device input buffers and output drivers. Taking CKE
LOW provides PRECHARGE, POWER DOWN and SELF
REFRESH operation (all banks idle), or ACTIVE POWER DOWN
(row ACTIVE in any bank). CKE is synchronous for all functions
except for SELF REFRESH EXIT, which is achieved
asynchronously. Input buffers, excluding CK, CK and CKE, are
disabled during power down and self refresh mode which are
contrived for low standby power consumption.
Output with read data, input with write data. Edge-aligned with
read data, centered with write data. Used to capture write data.
x16: LDQS: DQ0~DQ7; UDQS: DQ8~DQ15.
x32: DQS0: DQ0~DQ7; DQS1: DQ8~DQ15;
DQS2: DQ16~DQ23; DQS3: DQ24~DQ31.
Power supply for input buffers and internal circuit.
VSS
Supply
Ground
Ground for input buffers and internal circuit.
VDDQ
Supply
Power for I/O
Buffer
Power supply separated from VDD, used for output drivers to
improve noise.
VSSQ
Supply
Ground for I/O
Buffer
Ground for output drivers.
NC
-
No Connect Non connection pin.
4.2 Addressing Table
ITEM
Number of banks
Bank address pins
Auto precharge pin
Row addresses
X16
Column addresses
tREFI(µ s)
Row addresses
x32
Column addresses
tREFI(µ s)
256 Mb
4
BA0,BA1
A10/AP
A0-A12
A0-A8
7.8
A0-A11
A0-A8
15.6
Publication Release Date : Oct, 15, 2012
-7-
Revision : A01-004