參數(shù)資料
型號: STPCCONSUMER-S
廠商: 意法半導(dǎo)體
英文描述: CONNECTOR ACCESSORY
中文描述: 連接器附件
文件頁數(shù): 45/51頁
文件大?。?/td> 836K
代理商: STPCCONSUMER-S
BOARD LAYOUT
45/51
Release B
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
When using DIMM modules, schematics have to
be done carefully in order to avoid data busses
completely crossed on the board. This has to be
checked at the library level. In order to achive lay-
out shown in Figure 6-12, schematics have to im-
plement the crossing described on Figure 6-13.
The DQM signals must be exchanged using the
same order.
Figure 6-11. Clock routing
MCLKO
DIMMCKninput
STPCMCLKI
DIMMCKninput
DIMMCKninput
Lowskewclockdriver:
L
L+75mm*
20pF
* Noadditionnal 75mm whenSDRAMdirectly soldered on board
Figure 6-12. Optimum data bus layout for DIMM
Figure 6-13. Schematics for optimum data bus layout for DIMM
DIMM
STPC
SDRAMI/F
D[15:00]
D[47:32]
D[31:16]
D[63:48]
MD[31:00]
MD[63:32]
MD[15:00],DQM[1:0]
MD[31:16],DQM[3:2]
MD[47:32],DQM[5:4]
MD[63:48],DQM[7:6]
D[15:00],DQM[1:0]
D[31:16],DQM[3:2]
D[47:32],DQM[5:4]
D[63:48],DQM[7:6]
DIMM
STPC
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