3.4.8.2.2 eMMC Interface
The processor card supports eMMC Flash memory (part number Micron MTFC16GAPALBH-IT), connected to
MMC0 port of the AM64x processor. The flash is connected to 8 bits of the MMC0 interface supporting HS400
double data rates up to 200 MHz.
Figure 3-16. eMMC Interface
3.4.8.3 OSPI Interface
The GP EVM has 512 Mbit OSPI memory device of part number S28HS512TGABHM010 from Cypress is
connected to OSPI0 interface of AM64x SoC. The OSPI interface supports single and double data rates with
memory speed up to 200 MBps SDR and 400 MBps DDR (200 MHz clock speed).
Two signals are routed to OSPI0_DQS:
1. OSPI0_DQS from the memory device
2. OSPI0_LBCLK from SoC
To route DQS from memory device: Mount R601 & R592 and DNI R600 & R591.
To route OSPI0_LBCLK from SoC: Mount R600 & R591 and DNI R601 & R592
Note
For more information, see the
OSPI and QSPI Board Design and Layout Guidelines
section in the
AM64x Sitara™ Processors Data Manual
OSPI & QSPI implementation: 0 ohm resistors are provided for DATA[7:0], DQS, INT# and CLK signals.
Footprints to mount external pull up resistors are provided on DATA[7:0] to prevent bus floating. The
footprint for the OSPI memory also allows the installation of either a QSPI memory or an OSPI memory.
S25FL256SABHI200 from Cypress shall be used in variants where QSPI flash is required. The 0 ohm resistors
used in pins OSPI_DATA[4:7] will be removed if QSPI flash is mounted
Note
For QSPI Configuration
Remove 0E resistors from the following
1. OSPI_DQ4 to OSPI_DQ7 nets (R432, R441, R442, R443)
2. OSPI_INTn (R158)
System Description
SPRUIX0B – FEBRUARY 2021 – REVISED MARCH 2021
AM64x GP EVM User's Guide
29
Copyright © 2021 Texas Instruments Incorporated