SoM-A5D36 User Manual
Revision 1.30 © 2015
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Table 25: Boot Options
SODIMM
Pin#
SoM
Pin Name
Processor
Pin Name(s)
Description
157
BOOT_OPTION0
BMS
Serial Boot Mode Select
158
BOOT_OPTION1
-
Disable Serial Flash
2.7
Serial Data Flash
The Serial Flash is connected to SPI0 and uses SPI0_NPCS0 to enable it. The Serial Flash also has a Write-
Protect Provision. To Write-Protect the Serial Flash, pull SoM pin# 154 low. SoM pin# 154 is pulled up by
a 10K ohm resistor on the module.
If this feature is required it would be implemented on the carrier as a jumper or an I/O line.
3
Design Considerations
One of the goals of the SoM-A5D36 is to provide a modular, flexible and inexpensive solution capable of
delivering high-end microcontroller performance with low power requirements.
3.1
Off-the-Shelf Carriers
Many SoM-
A5D36 applications can make use of EMAC’s off
-the-shelf carriers. These carriers provide
power to the SoM as well as a wealth of connectors and interfaces to access peripheral I/O including audio
and LCD.
3.1.1
SoM-200GS
This is a Half-
EBX mounting hole form factor (4.37" x 6.00") carrier that comes with a 4.3” LCD interface
as well as full schematics and a BOM, and can be used as is, or as a reference for a customer’s own design.
•
10/100/1000 BaseT Ethernet with Status LEDs
•
3 serial RS232 ports and 1 RS232/422/485 port
•
Resistive Touchscreen interface
•
480 x 272 Graphic LCD with Touchscreen
•
Battery for nonvolatile RAM and Real Time Clock
•
Micro SD Card Socket
•
2 USB Host & 1 USB OTG ports
•
1 I2S Audio port with Line-In/Line-Out
•
5 VDC Power Requirement
http://emacinc.com/products/system_on_module/SoM-200GS
