RK3188-SOM-EVB is a reference design of a 2-layer board for RK3188-SOM. It expands the features of RK3188-SOM by adding HDMI, LCD, 100Mb Ethernet, USB-OTG, 4 USB hosts, and 0.1'' GPIO headers. The hardware sources are available as Eagle CAD files, so everyone can modify and tailor according to his needs.
Reference design of a 2-layer board comaptible with RK3188-SOM that adds HDMI, 100MB Ethernet, USB-OTG, 4x USB HS/FS/LS hosts, RTC with backup battery. The RK3188-SOM-EVB board also adapts the 0.05'' step GPIO headers to 0.1'' step headers so you can easily attach an LCD or UEXT module. Its hardware design is open source and available as Eagle CAD files, so everyone can modify and tailor it according to the specific needs. Templates for RK3188-SOM receiptacle are available for Eagle and KiCAD.
RK3188-SOM(-4GB) matching connectors
Power barrel jack, +6V to +16V DC
HDMI video output with a standard connector
LCD video output on a 40 pin at 0.1" step connector (compatible with Olimex LCD displays)
100Mb Ethernet interface with a connector
2 × UEXT connectors
USB-OTG with power control and current limiter
4 × USB host
Built-in RTC module
Coin battery connector that keeps the RTC powered
2 × GPIO connectors × 40 pin @ 0.1" step
Dimensions of the SOM part: (3.2×1.8)'' ~ (81×56)mm
Dimensions of the EVB part: (5.45×3.35)" ~ (138×85)mm
Image links, instructions, demo software, customer projects and more might be found at the wiki page of RK3188-SOM: RK3188-SOM wiki pages
How do I remove the RK3188-SOM-4GB main board from the RK3188-SOM-EVB peripheral board? It looks like a very tight fit.
Try to use a thin and long object as a lever. Carefully place it on a spot that won't damage other components. Push each side slowly up before attempting to pull out the RK3188-SOM-4GB from the RK3188-SOM-EVB's connectors. Never try to remove the whole side in one go! Doing so would most likely damage the connectors and the male pins! Always try to symetrically push up the RK3188-SOM-4GB frm the EVB.