Скачать или смотреть Raspberry Pi Compute Module 3+

1 Introduction
The Raspberry Pi Compute Module 3+ (CM3+) is a range of DDR2-SODIMM-mechanically-compatible
System on Modules (SoMs) containing processor, memory, eMMC Flash (on non-Lite variants) and
supporting power circuitry. These modules allow a designer to leverage the Raspberry Pi hardware and
software stack in their own custom systems and form factors. In addition these modules have extra IO
interfaces over and above what is available on the Raspberry Pi model A/B boards, opening up more
options for the designer.
The CM3+ contains a BCM2837B0 processor (as used on the Raspberry Pi 3B+), 1Gbyte LPDDR2
RAM and eMMC Flash. The CM3+ is currently available in 4 variants, CM3+/8GB, CM3+/16GB,
CM3+/32GB and CM3+ Lite, which have 8, 16 and 32 Gigabytes of eMMC Flash, or no eMMC Flash,
respectively.
The CM3+ Lite product is the same as CM3+ except the eMMC Flash is not fitted, and the SD/eMMC
interface pins are available for the user to connect their own SD/eMMC device.
Note that the CM3+ is electrically identical and, with the exception of higher CPU z-height, physically
identical to the legacy CM3 products.
CM3+ modules require a software/firmware image dated November 2018 or newer to function correctly
9.4 USB
The BCM2837 USB port is On-The-Go (OTG) capable. If using either as a fixed slave or fixed master,
please tie the USB OTGID pin to ground.
The USB port (Pins USB DP and USB DM) must be routed as 90 ohm differential PCB traces.
Note that the port is capable of being used as a true OTG port however there is no official documentation.
Some users have had success making this work.
9.5 HDMI
BCM283x supports HDMI V1.3a.
It is recommended that users follow a similar arrangement to the Compute Module IO Board circuitry
for HDMI output.
The HDMI CK P/N (clock) and D0-D2 P/N (data) pins must each be routed as matched length 100
ohm differential PCB traces. It is also important to make sure that each differential pair is closely phase
matched. Finally, keep HDMI traces well away from other noise sources and as short as possible.
Failure to observe these design rules is likely to result in EMC failure.