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the lcd signals (they can be found on gpio1 pins 2-15 and 2-24).
**Pin 36 provides option on which signal would drive the backlight. By default pwm0_out is chosen. The other two
options provided are p1_18/ehrpwm1a/txd3 and p3_15/spi1_d0(miso). You would need to remove r38 and place it on
the pads of either r36 or r37. Placing r36 would enable p1_18/ehrpwm1a/txd3. Placing r37 would enable
p3_15/spi1_d0(MISO). Warning! Re-configuration might brick your device! It is neither needed for typical operation
nor recommended.
**LCD data pins #0 to #15 are used during initial boot to set the system boot configuration. The default boot priority
set by LCD data pins is usb0->nand->spi0->mmc0. Refer to the am3352 documentation for more information about the
system boot configuration.
6.7 Jumper description
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.
Jumper name
NAND_E
NWP
6.8 Additional hardware components
The components below are mounted on the AM3352-SOM but are not discussed above. They are
listed here for completeness:
RST button – reset – used to reset the board
NMI button – non-masked interrupt – unused
PWR_LED – RED power identification LED
LED1 – GREEN user-programmable LED
512MB = 4Gb (256 M x 16 bit) DDR3 SDRAM – the exact memory used in the board revision
mentioned is SAMSUNG K4B4G1646D-BCK0
The DDR3 memory part name in the schematic might be outdated.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.
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
Type
Default position
SMT
OPEN
Board jumpers
Function
By default both jumpers are open.
You would need to solder those in
order to use the NAND memory pads.
Note that you would also need to
solder NAND memory and the suitable
components of the circuit (marked
as NA in the schematic)
Page 29 of 36
AM3352-SOM user's manual
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