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W632GG8KB-12 Datasheet(PDF) 2 Page - Winbond |
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W632GG8KB-12 Datasheet(HTML) 2 Page - Winbond |
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2 / 159 page  W632GG8KB Publication Release Date: Jul. 28, 2014 Revision: A04 - 2 - 8.9 Write Leveling .....................................................................................................................................30 8.9.1 DRAM setting for write leveling & DRAM termination function in that mode ....................31 8.9.2 Write Leveling Procedure.................................................................................................31 8.9.3 Write Leveling Mode Exit .................................................................................................33 8.10 Multi Purpose Register ........................................................................................................................34 8.10.1 MPR Functional Description.............................................................................................35 8.10.2 MPR Register Address Definition.....................................................................................36 8.10.3 Relevant Timing Parameters............................................................................................36 8.10.4 Protocol Example .............................................................................................................36 8.11 ACTIVE Command..............................................................................................................................42 8.12 PRECHARGE Command ....................................................................................................................42 8.13 READ Operation .................................................................................................................................43 8.13.1 READ Burst Operation .....................................................................................................43 8.13.2 READ Timing Definitions..................................................................................................44 8.13.2.1 READ Timing; Clock to Data Strobe relationship....................................................45 8.13.2.2 READ Timing; Data Strobe to Data relationship .....................................................46 8.13.2.3 tLZ(DQS), tLZ(DQ), tHZ(DQS), tHZ(DQ) Calculation .............................................47 8.13.2.4 tRPRE Calculation..................................................................................................48 8.13.2.5 tRPST Calculation ..................................................................................................48 8.13.2.6 Burst Read Operation followed by a Precharge......................................................54 8.14 WRITE Operation................................................................................................................................56 8.14.1 DDR3 Burst Operation .....................................................................................................56 8.14.2 WRITE Timing Violations .................................................................................................56 8.14.2.1 Motivation ...............................................................................................................56 8.14.2.2 Data Setup and Hold Violations..............................................................................56 8.14.2.3 Strobe to Strobe and Strobe to Clock Violations.....................................................56 8.14.2.4 Write Timing Parameters ........................................................................................56 8.14.3 Write Data Mask...............................................................................................................57 8.14.4 tWPRE Calculation...........................................................................................................58 8.14.5 tWPST Calculation ...........................................................................................................58 8.15 Refresh Command ..............................................................................................................................65 8.16 Self-Refresh Operation .......................................................................................................................67 8.17 Power-Down Modes ............................................................................................................................69 8.17.1 Power-Down Entry and Exit .............................................................................................69 8.17.2 Power-Down clarifications - Case 1 .................................................................................75 8.17.3 Power-Down clarifications - Case 2 .................................................................................75 8.17.4 Power-Down clarifications - Case 3 .................................................................................76 8.18 ZQ Calibration Commands..................................................................................................................77 8.18.1 ZQ Calibration Description ...............................................................................................77 8.18.2 ZQ Calibration Timing ......................................................................................................78 8.18.3 ZQ External Resistor Value, Tolerance, and Capacitive loading......................................78 8.19 On-Die Termination (ODT) ..................................................................................................................79 8.19.1 ODT Mode Register and ODT Truth Table ......................................................................79 8.19.2 Synchronous ODT Mode..................................................................................................80 8.19.2.1 ODT Latency and Posted ODT...............................................................................80 8.19.2.2 Timing Parameters .................................................................................................80 8.19.2.3 ODT during Reads..................................................................................................82 8.19.3 Dynamic ODT ..................................................................................................................83 8.19.3.1 Functional Description: ...........................................................................................83 |
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