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TMS320DM647 Scheda tecnica(PDF) 103 Page - Texas Instruments

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Il numero della parte TMS320DM647
Spiegazioni elettronici  Digital Media Processor
PDF  181 Pages
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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TMS320DM647 Scheda tecnica(HTML) 103 Page - Texas Instruments

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A1
A1
T
T
DM648
TMS320DM647
TMS320DM648
www.ti.com
SPRS372F – JANUARY 2010 – REVISED SEPTEMBER 2009
Table 6-38. DQS and DQ Routing Specification (1) (continued)
NO.
PARAMETER
MIN
TYP
MAX
UNIT
7
Center to center DQ to other DDR2 trace spacing(2) (6)
4 w
8
Center to Center DQ to other DQ trace spacing(7) (2)
3w
9
DQ/DQS E Skew Length Mismatch(3) (4) (5)
100
Mils
(6)
DQs from other DQS domains are considered other DDR2 trace.
(7)
DQLM is the longest Manhattan distance of each of the DQS and DQ net classes.
Figure 6-18 shows the routing for the DQGATE net classes. Table 6-39 contains the routing specification.
A.
DM648 is shown in this figure as an example of the device and represents the entire set of devices that include:
DM647/DM648.
Figure 6-18. DQGATE Routing
Table 6-39. DQGATE Routing Specification
NO.
PARAMETER
MIN
TYP
MAX
UNIT
1
DQGATEL Length F(1)
CKB0B1
2
DQGATEH Length F(2) (3)
CKB2B3
3
Center to center DQGATE to any other trace spacing
4 w
4
DQS/DQ nominal trace length
DQLM - 50
DQLM
DQLM +
Mils
50
5
DQGATEL Skew(4)
100
Mils
6
DQGATEH Skew(5) (3)
100
Mils
(1)
CKB0B1 is the sum of the length of the CK net plus the average length of the DQS0 and DQS1 nets.
(2)
CKB2B3 is the sum of the length of the CK net plus the average length of the DQS2 and DQS3 nets.
(3)
Only used on 32-bit-wide DDR2 memory systems.
(4)
Skew from CKB0B1
(5)
Skew from CKB2B3
Copyright © 2010–2009, Texas Instruments Incorporated
Peripheral Information and Electrical Specifications
103
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Product Folder Link(s): TMS320DM647 TMS320DM648



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