W641GG2JB Datasheet, PDF (1/109 Pages) Winbond – 1-Gbit GDDR3 Graphics SDRAM

W641GG2JB
1-Gbit GDDR3 Graphics SDRAM
Table of Contents
1. GENERAL DESCRIPTION .......................................................................................................... 6
2. FEATURES .................................................................................................................................. 7
3. PIN CONFIGURATION ................................................................................................................ 8
3.1 Ballout 1-CS Non-Merged Mode (Top View, MF=0)............................................................................. 8
3.2 Ballout 2-CS Non-Merged Mode (Top View, MF=0)............................................................................. 9
3.3 Ballout Merged Mode (Top View, MF=0) ........................................................................................... 10
4. PIN DESCRIPTION .................................................................................................................... 11
4.1 Signal Description.............................................................................................................................. 11
4.2 Addressing ........................................................................................................................................ 12
5. STATE DIAGRAM ..................................................................................................................... 13
5.1 State Diagram for One Activated Bank ............................................................................................... 13
5.1.1 State diagram for one bank ............................................................................................................................. 13
5.1.2 Function Truth Table for more than one Activated Bank..................................................................................14
5.1.2.1 Function Truth Table ...................................................................................................................................................14
5.1.3 Function Truth Table for CKE ..........................................................................................................................15
5.2 Functional Block Diagram in 1-CS Mode ........................................................................................... 16
5.3 Functional Block Diagram in 2-CS Mode ........................................................................................... 17
6. FUNCTIONAL DESCRIPTION................................................................................................... 18
6.1 System Configurations....................................................................................................................... 18
6.1.1 System Configurations in 1-CS Mode and 2-CS Mode ...................................................................................18
6.1.2 Initialization in 1– CS mode .............................................................................................................................19
6.1.3 Initialization in 2– CS mode .............................................................................................................................20
6.1.3.1 Power Up Sequence ...................................................................................................................................................21
.2 Mirror Function .................................................................................................................................... 22
6.2.1 Ball Assignment with Mirror Function ..............................................................................................................22
6.3 Commands ........................................................................................................................................ 23
6.3.1 Command Overview for 1-CS mode ................................................................................................................23
6.3.2 Command Overview for 2-CS mode ................................................................................................................24
6.3.3 Description of Command .................................................................................................................................25
6.3.4 Minimum delay from RD/A and WR/A to any other command (to another bank) with concurrent AP .............28
6.4 Boundary Scan .................................................................................................................................. 28
6.4.1 General Description ......................................................................................................................................... 28
6.4.2 Disabling the scan feature ............................................................................................................................... 28
6.4.2.1 Internal Block Diagram (Reference only) ....................................................................................................................29
6.4.2.2 Boundary Scan Exit Order...........................................................................................................................................29
6.4.2.3 Scan Pin Description ...................................................................................................................................................30
6.4.2.4 Scan DC Electrical Characteristics and Operating Condition.......................................................................................30
6.4.2.5 Scan Capture Timing...................................................................................................................................................31
Publication Release Date: Apr, 22, 2011
-1-
Revision A01-002