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TNETV2685FIBZUT7 Datasheet(PDF) 110 Page - Texas Instruments

No. de pieza TNETV2685FIBZUT7
Descripción Electrónicos  Digital Media Processor
PDF  191 Pages
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TNETV2685FIBZUT7 Datasheet(HTML) 110 Page - Texas Instruments

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A1
A1
T
T
DM648
TMS320DM647
TMS320DM648
SPRS372H – MAY 2007 – REVISED APRIL 2012
www.ti.com
Table 6-39. 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 6-40 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 6-40. 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
110
Peripheral Information and Electrical Specifications
Copyright © 2007–2012, Texas Instruments Incorporated
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Product Folder Link(s): TMS320DM647 TMS320DM648



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