PCM-072/phyCORE-AM64xx System on Module
L-860e.A0
© PHYTEC America L.L.C. 2022
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6
System Memory
The following sub-sections detail each memory type supported on the phyCORE-AM64xx as well as how to configure which
memory system to boot from. This section is split into memories populated on the SOM and potential CB memory
interfaces.
6.1 SOM Memory
6.1.1 DDR4 RAM
The RAM on the phyCORE-AM64xx is comprised of one DDR4 SDRAM chip for a 16-bit wide interface providing up to 2GB
of SDRAM which can run at up to 1600MT/s. These chips are connected to the dedicated DDR subsystem of the AM64xx
processor. Typically, the DDR4 SDRAM initialization is performed by a bootloader or operating system following a power-
on reset and must not be changed at a later point by any application code. When writing custom code independent of an
operating system or bootloader, SDRAM must be initialized through the appropriate SDRAM configuration registers on
the AM64xx processor. Refer to the
AM64xx Technical Reference Manual
about accessing and configuring these registers.
Contact our sales team for information on the available DDR4 population options:
6.1.2 EEPROM
The phyCORE-AM64xx is populated with one nonvolatile 32KB EEPROM with an I
2
C interface. This memory can be used to
store configuration data or other general-purpose data. The device is accessed through the I2C0 on the AM64xx at address
0x50.
6.1.3 eMMC Flash
An eMMC flash device is populated on the SOM as a programmable nonvolatile storage. The eMMC flash is connected to
the MMC0 8-bit interface of the phyCORE-AM64xx which supports the JEDEC eMMC electrical standard v5.1. Contact our
sales team for information on the available eMMC population options:
6.1.4 OSPI
An Octal Serial Peripheral Interface (OSPI) Flash is populated on the SOM as a programmable nonvolatile storage. The OSPI
interface supports single, dual, quad, or octal read/write access to the flash device. The OSPI Flash can be used for a fast
boot. Contact our sales team for information on the available OSPI population options:
