HY5PS12421BFP-E3 Datasheet, PDF (9/38 Pages) Hynix Semiconductor – 512Mb DDR2 SDRAM

1HY5PS12421B(L)FP
1HY5PS12821B(L)FP
1HY5PS121621B(L)FP
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PIN
TYPE
DESCRIPTION
Data Strobe : Output with read data, input with write data. Edge aligned with read data,
centered in write data. For the x16, LDQS correspond to the data on DQ0~DQ7; UDQS
corresponds to the data on DQ8~DQ15. For the x8, an RDQS option using DM pin can
be enabled via the EMRS(1) to simplify read timing. The data strobes DQS, LDQS,
UDQS, and RDQS may be used in single ended mode or paired with optional comple-
mentary signals DQS, LDQS,UDQS and RDQS to provide differential pair signaling to the
system during both reads and wirtes. An EMRS(1) control bit enables or disables all
complementary data strobe signals.
DQS, (DQS)
(UDQS),(UDQS)
(LDQS),(LDQS)
(RDQS),(RDQS)
Input/
Output
In this data sheet, "differential DQS signals" refers to any of the following with A10 = 0
of EMRS(1)
x4 DQS/DQS
x8 DQS/DQS
if EMRS(1)[A11] = 0
x8 DQS/DQS, RDQS/RDQS,
if EMRS(1)[A11] = 1
x16 LDQS/LDQS and UDQS/UDQS
"single-ended DQS signals" refers to any of the following with A10 = 1
of EMRS(1)
x4 DQS
x8 DQS
if EMRS(1)[A11] = 0
x8 DQS, RDQS, if EMRS(1)[A11] = 1
x16 LDQS and UDQS
NC
VDDQ
VSSQ
VDDL
VSSDL
VDD
VSS
VREF
No Connect : No internal electrical connection is present.
Supply DQ Power Supply: 1.8V +/- 0.1V
Supply DQ Ground
Supply DLL Power Supply : 1.8V +/- 0.1V
Supply DLL Ground
Supply Power Supply : 1.8V +/- 0.1V
Supply Ground
Supply Reference voltage for inputs for SSTL interface.
Rev. 0.7 / Oct. 2007
9