W948D2FBJX5E【PDF 1/60 页】IC LPDDR SDRAM 256MBIT 90VFBGA

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录369

[1页]2页 3页 4页 5页

W948D6FB / W948D2FB

256Mb Mobile LPDDR

TABLE OF CONTENTS

1. GENERAL DESCRIPTION .................................................................................................. 4

2. FEATURES.......................................................................................................................... 4

3. PIN CONFIGURATION ........................................................................................................ 5

3.1 Ball Assignment: LPDDR x16 ..................................................................................................... 5

3.2 Ball Assignment: LPDDR x32 ..................................................................................................... 5

4. PIN DESCRIPTION ............................................................................................................. 6

4.1 Signal Descriptions ..................................................................................................................... 6

4.2 Addressing Table ........................................................................................................................ 7

5. BLOCK DIAGRAM .............................................................................................................. 8

5.1 Block Diagram ............................................................................................................................ 8

5.2 Simplified State Diagram ............................................................................................................ 9

6. FUNCTION DESCRIPTION ............................................................................................... 10

6.1 Initialization ............................................................................................................................... 10

6.1.1 Initialization Flow Diagram ............................................................................................................. 11

6.1.2 Initialization Waveform Sequence ................................................................................................. 12

6.2 Register Definition .................................................................................................................... 12

6.2.1 Mode Register Set Operation ........................................................................................................ 12

6.2.2 Mode Register Definition ............................................................................................................... 13

6.2.3. Burst Length ................................................................................................................................. 13

6.3 Burst Definition ......................................................................................................................... 14

6.4 Burst Type ................................................................................................................................ 15

6.5 Read Latency............................................................................................................................ 15

6.6 Extended Mode Register Description ....................................................................................... 15

6.6.1 Extended Mode Register Definition ............................................................................................... 16

6.7 Status Register Read ................................................................................................................ 16

6.7.1 SRR Register (A[n:0] = 0) .............................................................................................................. 17

6.7.2 Status Register Read Timing Diagram .......................................................................................... 18

6.8 Partial Array Self Refresh ......................................................................................................... 19

6.9 Automatic Temperature Compensated Self Refresh ................................................................ 19

6.10 Output Drive Strength ............................................................................................................. 19

6.11 Commands ............................................................................................................................. 19

6.11.1 Basic Timing Parameters for Commands .................................................................................... 19

6.11.2 Truth Table - Commands ............................................................................................................. 20

6.11.3 Truth Table - DM Operations ....................................................................................................... 21

6.11.4 Truth Table - CKE ........................................................................................................................ 21

6.11.5 Truth Table - Current State BANKn - Command to BANKn ........................................................ 22

6.11.6 Truth Table - Current State BANKn, Command to BANKn ......................................................... 23

7. OPERATION...................................................................................................................... 24

7.1. Deselect ................................................................................................................................... 24

7.2. No Operation ........................................................................................................................... 24

7.2.1 NOP Command ............................................................................................................................. 25

7.3 Mode Register Set .................................................................................................................... 25

Publication Release Date : Oct, 15, 2012

-1-

Revision : A01-004

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式