AS4C16M16MD1-6BCN Alliance Memory

AS4C16M16MD1 256Mb MOBILE DDR SDRAM TABLE OF CONTENTS 1. GENERAL DESCRIPTION ................................................................................................... 4 2. FEATURES ........................................................................................................................... 4 3. PIN DESCRIPTION............................................................................................................... 5 3.1 Signal Descriptions.......................................................................................................................... 6 4. BLOCK DIAGRAM ............................................................................................................... 8 4.1 Block Diagram .................................................................................................................................8 4.2 Simplified State Diagram ................................................................................................................. 9 5. FUNCTION DESCRIPTION ................................................................................................. 10 5.1 Initialization ....................................................................................................................................11 5.1.1 Initialization Flow Diagram ................................................................................................................. 12 5.2 Register Definition .........................................................................................................................13 5.2.1 Mode Register ............................................................................................................................ 13 5.3 Burst Definition .............................................................................................................................. 13 5.2.1.2 Burst Type ............................................................................................................................... 14 5.2.2 Extended Mode Register ............................................................................................................ 14 5.2.2.1 Partial Array Self Refresh ....................................................................................................... 15 5.2.2.2 Temperature Compensated Self Refresh ............................................................................... 15 5.2.2.3 Output Drive Strength ............................................................................................................. 15 6. COMMANDS .................................................................................................................... 16 7. OPERATION ........................................................................................................................ 21 7.1. Deselect ........................................................................................................................................ 21 7.2. No Operation ................................................................................................................................ 21 7.4. Active ............................................................................................................................................ 22 7.5. Read ............................................................................................................................................. 23 7.5.1 Read to Read ...................................................................................................................................... 25 6.5.11 Burst Terminate ................................................................................................................................. 30 7.6 Write .............................................................................................................................................. 30 7.6.1 Write to Write ..................................................................................................................................... 32 7.7 Precharge ...................................................................................................................................... 36 7.8 Auto Precharge ............................................................................................................................. 37 7.9 Refresh Requirements .................................................................................................................. 37 7.10 Auto Refresh ............................................................................................................................... 37 7.11 Self Referesh ............................................................................................................................... 37 7.12 Power Down ................................................................................................................................ 39 7.13 Deep Power Down ...................................................................................................................... 41 7.14 Clock Stop ................................................................................................................................... 42 8. ELECTRICAL CHARACTERISTIC ......................................................................................43 Confidential - 1/56 - Ver.1.1 Oct.2015AS4C16M16MD1 256Mb MOBILE DDR SDRAM 8.1 Absolute Maximum Ratings .......................................................................................................... 43 8.2 Input/Output Capacitance ............................................................................................................. 43 8.3 Electrical Characteristics and AC/DC Operating Conditions ........................................................ 44 8.3.1 Electrical Characteristics and AC/DC Operating Conditions ............................................................... 44 8.4 IDD Specification Parameters and Test Conditions ..................................................................... 45 8.4.1 IDD Specification Parameters and Test Conditions ............................................................................ 45 8.5 AC Timings .................................................................................................................................... 47 8.5.2 Output Slew Rate Characteristics ....................................................................................................... 51 7.5.3 AC Overshoot/Undershoot Specification ............................................................................................. 51 8.5.4 AC Overshoot and Undershoot Definition ........................................................................................... 52 9. PACKAGE DIMENSION ..................................................................................................... 53 10. ORDERING INFORMATION ............................................................................................. 54 11. REVISION HISTORY ........................................................................................................ 55 Confidential - 2/56 - Ver.1.1 Oct.2015