TN-41-16: DDR3 MT41K512M16 DDP to SDP Transition

TN-41-16: DDR3 MT41K512M16 DDP to SDP Transition Guide
Introduction
Technical Note
Transitioning DDR3 8Gb DDP 2CS to 8Gb SDP 1CS
Introduction
This technical note explains how to transition a dual-rank 8Gb 2CS (dual die)
MT41K512M16 DDP device to a single-rank 8Gb 1CS (monolithic) MT41K512M16 SDP
device without changing density, bandwidth, ball assignments, or trace routing in the
PCB design.
This document is for custom design purposes only. For complete specifications, see the
product data sheet.
PDF: 09005aef857b1683
tn-41-16_ddr3_ddp_to_sdp.pdf - Rev. A 2/14 EN
1
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2013 Micron Technology, Inc. All rights reserved.
Products and specifications discussed herein are subject to change by Micron without notice.
TN-41-16: DDR3 MT41K512M16 DDP to SDP Transition Guide
8Gb 2CS DDP Block Diagram and Ball Assignments
8Gb 2CS DDP Block Diagram and Ball Assignments
Figure 1: Functional Block Diagram for DDP (64 Meg x 16 x 8 Banks x 2 Ranks)
Rank 1
(32 Meg x 16 x 8 banks)
Rank 0
(32 Meg x 16 x 8 banks)
CS1#
RAS#
CKE1
CAS#
ODT1
WE#
CK
CK#
CS0#
CKE0
A[14:0],
BA[2:0]
ZQ1
ODT0
ZQ0
DQS, DQS#
DQ[15:0]
DM/TDQS
TDQS#
PDF: 09005aef857b1683
tn-41-16_ddr3_ddp_to_sdp.pdf - Rev. A 2/14 EN
2
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2013 Micron Technology, Inc. All rights reserved.
TN-41-16: DDR3 MT41K512M16 DDP to SDP Transition Guide
8Gb 2CS DDP Block Diagram and Ball Assignments
Figure 2: DDP Ball Assignments – 96-Ball FBGA – x16 (Top View)
Note:
PDF: 09005aef857b1683
tn-41-16_ddr3_ddp_to_sdp.pdf - Rev. A 2/14 EN
1. Dark balls with rings designate balls that differ from the SDP version. Pin M7 (RFU) must
be NC (no connection) on the DDP layout for transition to SDP as the A15 pin.
3
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2013 Micron Technology, Inc. All rights reserved.
TN-41-16: DDR3 MT41K512M16 DDP to SDP Transition Guide
Ball Assignment Changes
Ball Assignment Changes
To transition from DDP to SDP, follow the pin changes outlined in Table 1.
Table 1: Ball Assignment Changes
Ball Number
DDP
SDP
Notes
J9
CKE1
NC
1
J1
ODT1
NC
1
L1
CS1#
NC
1
L9
ZQ1
NC
1
M7
RFU
A15
2
K9
CKE0
CKE
3
K1
ODT0
ODT
3
L2
CS0#
CS#
3
L8
ZQ0
ZQ
3
Notes:
1. NC = no connection.
2. New connection.
3. Same connection.
For NC, the ball has no connection to the device or to other balls within the SDRAM
package. It is recommended that the remaining PCB traces connected to the SDP NC
balls be driven to V SS or V DD via a system firmware change.
After completing the transitions in Table 1, verify all connections, values, and system
signal integrity simulations following the design guidance for DDR 3 signal integrity
outlined in TN-41-13: DDR 3 Point-to-Point Design Support.
A system firmware change to adjust the controller and DRAM DQ/DQS drive strength
may be required depending on system signal integrity simulation results.
PDF: 09005aef857b1683
tn-41-16_ddr3_ddp_to_sdp.pdf - Rev. A 2/14 EN
4
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2013 Micron Technology, Inc. All rights reserved.
TN-41-16: DDR3 MT41K512M16 DDP to SDP Transition Guide
8Gb 1CS SDP Block Diagram and Ball Assignments
8Gb 1CS SDP Block Diagram and Ball Assignments
Figure 3: Functional Block Diagram for SDP (64 Meg x 16 x 8 Banks)
(64 Meg x 16 x 8 banks)
RAS#
CAS#
WE#
CK
CK#
CS#
CKE
A[15:0],
BA[2:0]
ODT
ZQ
DQS, DQS#
DQ[15:0]
DM/TDQS
TDQS#
PDF: 09005aef857b1683
tn-41-16_ddr3_ddp_to_sdp.pdf - Rev. A 2/14 EN
5
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2013 Micron Technology, Inc. All rights reserved.
TN-41-16: DDR3 MT41K512M16 DDP to SDP Transition Guide
8Gb 1CS SDP Block Diagram and Ball Assignments
Figure 4: SDP Ball Assignments – 96-Ball FBGA – x16 (Top View)
1
2
3
VDDQ
DQ13
VSSQ
4
5
6
7
8
9
DQ15
DQ12
VDDQ
VSS
VDD
VSS
UDQS#
DQ14
VSSQ
VDDQ
DQ11
DQ9
UDQS
DQ10
VDDQ
VSSQ
VDDQ
UDM
DQ8
VSSQ
VDD
VSS
VSSQ
DQ0
LDM
VSSQ
VDDQ
VDDQ
DQ2
LDQS
DQ1
DQ3
VSSQ
VSSQ
DQ6
LDQS#
VDD
VSS
VSSQ
VREFDQ
VDDQ
DQ4
DQ7
DQ5
VDDQ
NC
VSS
RAS#
CK
VSS
NC
ODT0
VDD
CAS#
CK#
VDD
CKE
NC
CS
WE#
A10/AP
ZQ
NC
VSS
BA0
BA2
A15
VREFCA
VSS
VDD
A3
A0
A12/BC#
BA1
VDD
VSS
A5
A2
A1
A4
VSS
VDD
A7
A9
A11
A6
VDD
VSS
RESET#
A13
A14
A8
VSS
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
Note:
PDF: 09005aef857b1683
tn-41-16_ddr3_ddp_to_sdp.pdf - Rev. A 2/14 EN
1. Dark balls with rings designate balls that differ from the DDP version. Balls marked with
a star indicate a change from the DDP version.
6
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2013 Micron Technology, Inc. All rights reserved.
TN-41-16: DDR3 MT41K512M16 DDP to SDP Transition Guide
Revision History
Revision History
Rev. A – 02/14
• Initial release
8000 S. Federal Way, P.O. Box 6, Boise, ID 83707-0006, Tel: 208-368-3900
www.micron.com/productsupport Customer Comment Line: 800-932-4992
Micron and the Micron logo are trademarks of Micron Technology, Inc.
All other trademarks are the property of their respective owners.
This data sheet contains minimum and maximum limits specified over the power supply and temperature range set forth herein.
Although considered final, these specifications are subject to change, as further product development and data characterization sometimes occur.
PDF: 09005aef857b1683
tn-41-16_ddr3_ddp_to_sdp.pdf - Rev. A 2/14 EN
7
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2013 Micron Technology, Inc. All rights reserved.