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OLIMEX AM3352-SOMEVBIND [13/36] Mounted powering
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OLIMEX© 2015 AM3352-SOM user's manual
3.3.2 Mounted powering
Typically, AM3352-SOM gets evaluated when mounted atop AM3352-SOM-EVB. In this case the
former is powered via the latter. The power line, altogether with a number of other important
processor lines, is transferred via the 40-pin headers. AM3352-SOM receives power from AM3352-
SOM-EVB, but what are the requirements to power AM3352-SOM-EVB?
You need to provide 6V to 16V DC voltage to the power jack (named PWR) of AM3352-SOM-
EVB board. The DC barrel jack has 2.0mm inner pin and 6.3mm hole. More information about the
exact component might be found here: https://www.olimex.com/wiki/PWRJACK
For the European customers, we also stock and sell basic power supply adapters compatible with
the power jack.
Do not provide AC voltage to the AM3352-SOM-EVB board! Do not provide more than 16V of
voltage to the AM3352-SOM-EVB board!
The typical consumption of AM3352-SOM-EVB + AM3352-SOM is around 0.20A @ 10V but
might reach peaks up to 0.25A @ 10V during initial boot. These values were measured without
anything else connected to the board (e.g. no keyboard, no mouse, no LCD display, etc).
The board can NOT be powered by a personal computer using the USB_OTG connector.
During operation it is typical for some integrated circuits to appear hotter than others. This is
perfectly normal for some electronic components – for instance – the voltage regulators and the
main processor.
3.4 Button functions
The board comes with two buttons listed bellow:
RST – reset button – used for hardware reset of the board – before using it, please refer to the note
below
NMI – non-masked interrupt button – the button is not used in the default Linux image, however it
is required for some distributions
It is always recommended to perform a software “turn off” of the board or software “reset”. Then
you are free to remove the power supply.
If you disconnect the power supply (either the USB or the power jack) before turning off the board
you may corrupt your SD card.
Page 13 of 36
Содержание
- Am3352 som 1
- System on module linux enabled board 1
- User s manual 1
- Disclaimer 2
- There is no warranty for the design materials and the components used to create am3352 som and am3352 som evb they are considered suitable only for am3352 som and am3352 som evb respectively 2
- Chapter 1 overview 5 3
- Chapter 2 board description 8 3
- Chapter 3 setting up the am3352 som board 10 3
- Chapter 4 the am3352 processor 18 3
- Chapter 5 control circuity 20 3
- Chapter 6 connectors and pinout 21 3
- Disclaimer 2 3
- Table of contents 3
- Chapter 7 schematics 31 4
- Chapter 8 revision history and support 32 4
- Chapter 1 overview 5
- Introduction to som system on a module 5
- Introduction to the chapter 5
- Features of am3352 som 6
- Target market of the board 6
- Board variants 7
- Board versions used in the manual 7
- Document organization 7
- Chapter 2 board description 8
- Introduction to the chapter 8
- Layout top view 8
- Layout bottom view 9
- Chapter 3 setting up the am3352 som board 10
- Electrostatic and electrical polarity warnings 10
- Introduction to the chapter 10
- Requirements 11
- Powering the board 12
- Stand alone powering 12
- Button functions 13
- Mounted powering 13
- Interacting with the board 14
- Changing the default image resolution 15
- Expanding the debian file system space 15
- Connecting and calibrating a display 16
- Software support 17
- Chapter 4 the am3352 processor 18
- Introduction to the chapter 18
- The processor 18
- Block diagram 19
- The block diagram was taken from the based on the am3352 s documentation 19
- Chapter 5 control circuity 20
- Clocks 20
- Introduction to the chapter 20
- Power supply circuit 20
- Chapter 6 connectors and pinout 21
- Communication with am3352 som in linux 21
- Introduction to the chapter 21
- Uart0 header 21
- Microsd card connector 22
- Sd mmc slot 23
- Sd mmc slot is a microsd card slot connector located on the bottom of the board 23
- The schematic related to the sd mmc microsd connector is shown below 23
- This slot is typically used for booting the os due to the larger capacities of the microsd cards compared to sd or mmc cards it is suggested to have an sd card with a proper linux it is recommended to use class 10 10mbyte sec card for faster read write operations since lower class cards especially higher capacity ones might slow down the whole system 23
- You can find the table with the pinout of the microsd connector on the next page 23
- Gpio connectors 24
- Am_con gpio1 general purpose input output 40pin connector 25
- Am_con gpio2 general purpose input output 40pin connector 26
- Am_con gpio3 general purpose input output 40pin connector 27
- Am_con lcd 40pin connector 28
- Full list of recommended displays for the board might be found in chapter 3 connecting and calibrating a display 28
- Important you need additional adapter board and two different 40pin ribbon cables to connect an olimex display and the lcd_con the evaluation board am3352 som evb provides a 0 step lcd connector which eases the hardware interfacing between the board and the display 28
- The am_lcd con pins are led out on a separate 40pin connecter for the ease of connecting an lcd we have tested the ability of the board to interact with such a display they allow the user to attach additional hardware check readings or perform hardware debug 28
- The lcd connector is suitable but not plug and play due to the different pin step for a number of olimex displays and touchscreen panels with different native resolution the smallest available is the 4 one called lcd olinuxino 4 ts with native screen resolution of 480 272 through the 7 one named lcd olinuxino 7 with 800 480 to the 1024 600 10 lcd olinuxino 10 28
- The official linux image of the board lacks ready touschreen support 28
- Additional hardware components 29
- Jumper description 29
- Led1 green user programmable led 29
- Mb 4gb 256 m x 16 bit ddr3 sdram the exact memory used in the board revision mentioned is samsung k4b4g1646d bck0 29
- Pwr_led red power identification led 29
- Rst button reset used to reset the board nmi button non masked interrupt unused 29
- The board has two smt jumpers both are related to the optional nand memory these jumpers and their functions are not important for the general use of the board if you feel insecure of your soldering cutting technique it is better not to try to adjust the jumper since it is possible to damage the board 29
- The components below are mounted on the am3352 som but are not discussed above they are listed here for completeness 29
- The ddr3 memory part name in the schematic might be outdated we have used a number of different but fully compatible ddr3 memories due to supply unavailability it is always recommended to check the exact memory name printed on the component itself 29
- There are pads provided for nand flash memory the exact memory we had in mind while designing the board might be seen in the latest schematic you would need to place all 29
- Components missing from the circuit not only the memory you would also need to close the nand_e smt jumper note that we haven t performed any software tests with the nand memory 30
- Chapter 7 schematics 31
- Eagle schematic 31
- General physical dimensions 31
- Introduction to the chapter 31
- Board revision 32
- Chapter 8 revision history and support 32
- Document revision 32
- Introduction to the chapter 32
- Useful web links 32
- How to purchase 33
- Order codes 33
- Frequently asked questions 34
- For product support hardware information and error reports mail to support olimex com all document or hardware feedback is welcome note that we are primarily a hardware company and our software support is limited please consider reading the paragraph below about the warranty of olimex products 36
- Olimex 2015 am3352 som user s manual 36
- Page 36 of 36 36
- Product support 36
- The full text might be found at https www olimex com wiki gtc warranty for future reference 36
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