AN2674 datasheet(9/22 Pages) STMICROELECTRONICS

部件名	AN2674

功能描述	PCB layout guidelines for SPEAr3xx

PDF	22 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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9 / 22 page

AN2674

DDR memory interface

Doc ID 14204 Rev 2

9/22

DDR_CLK_N

2.4

DDR_CS_0

3.3

130

DDR_CS_1

6.1

241

DDR_ODT_0

3.8

148

DDR_ODT_1

2.6

104

DDR_DATA_0

P11

6.9

270

DDR_DATA_1

R11

2.9

112

DDR_DATA_2

T11

4.6

181

DDR_DATA_3

U11

4.2

165

DDR_DATA_4

T12

6.3

246

DDR_DATA_5

R12

5.4

212

DDR_DATA_6

P12

2.9

113

DDR_DATA_7

P13

5.5

217

DDR_DQS_0

U10

3.7

144

DDR_nDQS_0

T10

2.2

DDR_DM_0

U12

5.4

211

DDR_GATE_0

R10

6.6

261

DDR_DATA_8

T17

4.8

188

DDR_DATA_9

T16

4.6

181

DDR_DATA_10

U17

6.5

257

DDR_DATA_11

U16

5.7

222

DDR_DATA_12

U14

4.1

161

DDR_DATA_13

U13

4.3

169

DDR_DATA_14

T13

3.3

129

DDR_DATA_15

R13

5.5

217

DDR_DQS_1

U15

4.3

167

DDR_nDQS_1

T15

3.7

147

DDR_DM_1

T14

3.4

133

DDR_GATE_1

R14

6.6

258

Table 1.

Package substrate trace length (continued)

Signal name

Ball

Package substrate trace length

(mm)

(mils)

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