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HY5PS12421CFP-E3 Datasheet(PDF) 9 Page - Hynix Semiconductor |
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HY5PS12421CFP-E3 Datasheet(HTML) 9 Page - Hynix Semiconductor |
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9 / 38 page  Rev. 0.8 / Oct. 2007 9 1HY5PS12421C(L)FP 1HY5PS12821C(L)FP 1HY5PS121621C(L)FP PIN TYPE DESCRIPTION DQS, (DQS) (UDQS),(UDQS) (LDQS),(LDQS) (RDQS),(RDQS) Input/ Output 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. 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 No Connect : No internal electrical connection is present. VDDQ Supply DQ Power Supply: 1.8V +/- 0.1V VSSQ Supply DQ Ground VDDL Supply DLL Power Supply : 1.8V +/- 0.1V VSSDL Supply DLL Ground VDD Supply Power Supply : 1.8V +/- 0.1V VSS Supply Ground VREF Supply Reference voltage for inputs for SSTL interface. -Continue- |
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