AN2797 Datasheet, PDF (1/23 Pages) STMicroelectronics – PCB layout guidelines for SPEAr600

AN2797
Application note
PCB layout guidelines for SPEAr600
Introduction
SPEAr600 is a 23 x 23 mm PBGA420 device with 1 mm ball pitch. It is a member of the
SPEAr^® family of 32-bit embedded MPUs. The device features dual ARM926 cores running
at up to 333 MHz, an external DDR2 memory interface and a full set of powerful on-chip
peripherals.
This application note provides guidelines for successfully designing the PCB layout for
SPEAr600. It covers following main topics:
■ Power integrity
■ DDR memory interface
■ USB signals
■ GPIO/CLD signals
■ External clock
Placement guidelines for the decoupling capacitors are provided in Appendix A.
December 2009
Doc ID 14841 Rev 1
1/23
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