參數(shù)資料
型號： μPD481850
廠商： NEC Corp.
英文描述： Synchronous Graphics Memory (SGRAM)(8M 同步圖形存儲器)
中文描述： 同步圖形存儲器（SGRAM）（8分同步圖形存儲器）
文件頁數(shù)： 6/94頁
文件大小： 1180K
代理商： ΜPD481850
Preliminary Data Sheet
6
μ
PD481850 for Rev.L
14. Read/Write Command Interval ............................................................................................37
14.1 Read to Read Command Interval............................................................................................ 37
14.2 Write to Write Command Interval............................................................................................ 37
14.3 Write to Read Command Interval............................................................................................ 38
14.4 Block Write to Write or Write/Block Write Command Interval.............................................. 39
14.5 Block Write to Read Command Interval................................................................................. 39
14.6 Read to Write/Block Write Command Interval....................................................................... 40
15. Burst Termination.................................................................................................................41
15.1 Burst Stop Command in Full Page......................................................................................... 41
15.2 Precharge Termination............................................................................................................ 42
15.2.1 Precharge Termination in READ Cycle........................................................................... 42
15.2.2 Precharge Termination in WRITE cycle.......................................................................... 43
16. Electrical Specifications (Preliminary) ...............................................................................44
16.1 AC Parameters for Read/Write Cycles.................................................................................... 49
16.2 Relationship between Frequency and Latency ..................................................................... 51
16.3 /CS Function............................................................................................................................. 52
16.4 Basic Cycles............................................................................................................................. 53
16.4.1 Initialization ..................................................................................................................... 53
16.4.2 Mode Register Set........................................................................................................... 54
16.4.3 Refresh Cycle.................................................................................................................. 55
16.4.4 Cycle with Auto Precharge.............................................................................................. 57
16.4.5 Full Page Mode Cycle ..................................................................................................... 61
16.4.6 Precharge Termination Cycle.......................................................................................... 65
16.4.7 Clock Suspension ........................................................................................................... 67
16.4.8 Power Down Mode.......................................................................................................... 71
16.4.9 Other Cycles.................................................................................................................... 72
16.5 Graphics Cycles....................................................................................................................... 74
16.6 Application Cycles ................................................................................................................... 79
16.6.1 Page Cycles with Same Bank ......................................................................................... 79
16.6.2 Cycles with Ping-pong Banks.......................................................................................... 83
16.6.3 READ and WRITE Cycles............................................................................................... 87
16.6.4 Full Page Random Cycles............................................................................................... 89
17. Package Drawing..................................................................................................................91
18. Recommended Soldering Conditions ................................................................................92
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