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LPDDR

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Summary[edit]

Micron LPDDR.JPG

Low Power Double Data Rate memory (LPDDR) is also called Mobile DDR (MDDR). This form of memory operates at 1.8 volts as opposed to the more traditional 2.5 volts and is commonly used in portable electronics. As with all DDR memory, the double data rate is achieved by transferring data on both clock edges of the device. The following table describes LPDDR in relation to interfacing with the OMAP3530 device.


Supported devices Any JEDEC 209 compliant device
Supported Size Up to 1 Gigabyte
Max Clock Speed 266 MHz* (see note 1)
Device Count 1 or 2* (see note 2)
Data Width (bits) 16 or 32

Note 1: Higher speed grades are supported due to inherent JEDEC LPDDR backwards compatibility
Note 2: 1 x16 LPDDR device is used for 16 bit LPDDR memory system. 1x32 or 2x16 LPDDR devices are used for a 32 bit LPDDR memory system.


Supported Devices[edit]

Any JEDEC 209 compliant device.

Related Documents[edit]

Please refer to this section of the OMAP3530 data sheet for more details about LPDDR and OMAP3530.
OMAP3530 SDRC

Block Diagrams[edit]

Memories.JPG

Example for interfacing to OMAP SDRC[edit]

SDRC MDDR.JPG

The following link describes how to connect an external memory module to the OMAP3530 SDRC and calculate the timing parameters for the device.

Connecting a 512MB module to OMAP3530 SDRC (see section 11.2.6.3 Typical SDRC connection to an External SDRAM Device)


A 512 Mb mobile DDR SDRAM memory with the following characteristics has been chosen:

Type Mobile DDR SDRAM
Size 512 Mbits (8M ´ 16 ´ 4 banks)
Data bus 16-bit width
Speed 133-MHz clock frequency, 7.5-ns clock period
E2e.jpg {{
  1. switchcategory:MultiCore=
  • For technical support on MultiCore devices, please post your questions in the C6000 MultiCore Forum
  • For questions related to the BIOS MultiCore SDK (MCSDK), please use the BIOS Forum

Please post only comments related to the article LPDDR here.

Keystone=
  • For technical support on MultiCore devices, please post your questions in the C6000 MultiCore Forum
  • For questions related to the BIOS MultiCore SDK (MCSDK), please use the BIOS Forum

Please post only comments related to the article LPDDR here.

C2000=For technical support on the C2000 please post your questions on The C2000 Forum. Please post only comments about the article LPDDR here. DaVinci=For technical support on DaVincoplease post your questions on The DaVinci Forum. Please post only comments about the article LPDDR here. MSP430=For technical support on MSP430 please post your questions on The MSP430 Forum. Please post only comments about the article LPDDR here. OMAP35x=For technical support on OMAP please post your questions on The OMAP Forum. Please post only comments about the article LPDDR here. OMAPL1=For technical support on OMAP please post your questions on The OMAP Forum. Please post only comments about the article LPDDR here. MAVRK=For technical support on MAVRK please post your questions on The MAVRK Toolbox Forum. Please post only comments about the article LPDDR here. For technical support please post your questions at http://e2e.ti.com. Please post only comments about the article LPDDR here.

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