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DM385 参数 Datasheet PDF下载

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型号: DM385
PDF下载: 下载PDF文件 查看货源
内容描述: DM385和DM388 DaVincia ? ¢数字媒体处理器 [DM385 and DM388 DaVinci™ Digital Media Processor]
分类和应用:
文件页数/大小: 280 页 / 2479 K
品牌: TI [ TEXAS INSTRUMENTS ]
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DM385, DM388  
www.ti.com  
SPRS821D MARCH 2013REVISED DECEMBER 2013  
8.13.2.2.2 Compatible DDR2 Devices  
Table 8-48 shows the parameters of the DDR2 devices that are compatible with this interface. Generally,  
the DDR2 interface is compatible with x16 DDR2-800 speed grade DDR2 devices.  
Table 8-48. Compatible DDR2 Devices (Per Interface)  
NO.  
1
PARAMETER  
MIN  
MAX  
UNIT  
DDR2 device speed grade(1)  
DDR2 device bit width  
DDR2 device count(2)  
DDR2-800  
2
x16  
1
x16  
2
Bits  
Devices  
Balls  
3
4
DDR2 device ball count(3)  
84  
92  
(1) Higher DDR2 speed grades are supported due to inherent DDR2 backwards compatibility.  
(2) One DDR2 device is used for a 16-bit DDR2 memory system. Two DDR2 devices are used for a 32-bit DDR2 memory system.  
(3) The 92-ball devices are retained for legacy support. New designs will migrate to 84-ball DDR2 devices. Electrically, the 92- and 84-ball  
DDR2 devices are the same.  
8.13.2.2.3 PCB Stackup  
The minimum stackup required for routing the device is a six-layer stackup as shown in Table 8-49.  
Additional layers may be added to the PCB stackup to accommodate other circuitry or to reduce the size  
of the PCB footprint.  
Table 8-49. Minimum PCB Stackup  
LAYER  
TYPE  
Signal  
Plane  
Plane  
Signal  
Plane  
Signal  
DESCRIPTION  
Top routing mostly horizontal  
Ground  
1
2
3
4
5
6
Power  
Internal routing  
Ground  
Bottom routing mostly vertical  
Copyright © 2013, Texas Instruments Incorporated  
Peripheral Information and Timings  
221  
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Product Folder Links: DM385 DM388  
 
 
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