eorex
EM44AM1684LBA
to provide differential pair signaling to the system during both reads
and writes. An EMRS(1) control bit enables or disables all
complementary data strobe signals. In this data sheet, "differential
DQS signals" refers to A10 = 0 of EMRS(1) using LDQS/LDQS and
UDQS/UDQS. "single-ended DQS signals" refers to A10 = 1 of
EMRS(1) using LDQS and UDQS.
(Input Data Mask)
DM is an input mask signal for write data. Input data is masked
when DM is sampled HIGH coincident with that input data during a
Write access. DM is sampled on both edges of DQS. Although DM
pins are input only, the DM loading matches the DQ and DQS
loading.
(Data Input/Output)
Data inputs and outputs are on the same pin.
(Power Supply/Ground)
VDD and VSS are power supply for internal circuits.
(DQ Power Supply/DQ Ground)
VDDQ and VSSQ are power supply for the output buffers.
(DLL Power Supply/DLL Ground)
VDDL and VSSDL are power supply for DLL circuits
(Reference Voltage)
SSTL_1.8 reference voltage
(No Connection)
No internal electrical connection is present
.
B3,F3
UDM,LDM
G8,G2,H7,H3,H1,
H9,F1,F9,C8,
C2,D7,D3,D1,
D9,B1,B9
A1,E1,J9,M9,R1/
A3,E3,J3,N1,P9
A9,C1,C3,C7,C9,E
9,G1,G3,G7,G9/
A7,B2,B8,D2,D8,E
7,F2,F8,H2,H8
J1/J7
J2
A2,E2,L1,R3,R7,
R8
DQ0~15
VDD/VSS
VDDQ/VSSQ
VDDL/VSSDL
VREF
NC
Jul. 2006
5/29
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