OLIMEX© 2018
A20-OLinuXino-MICRO user's manual
address updated.
8. Power jack package updated.
9. SATA package updated.
I (unreleased)
1. eMMC was added.
2. RTL8201CP(LQFP-48) Ethernet chip replaced with LAN8710AI-
EZK(QFN-32). Both are MbE PHYs.
3. All libraries were updated.
4. L7, L15, L16 and L17 were changed from FB0805/600R/200mA(201209-
601) to FB0805/600R/2A.
5. PWR-JAKPWR_JACK_UNI_MILLING_SMALLER_DRILLS changed to PWRJ-
2mm(YDJ-1136).
6. R98 optimized from 10k/1% to 10k.
7. C195 and C208 optimized 22pF to 33pF.
8. R43 and R103 optimized from 51R to 100R.
9. C123, C126 and C135 were changed from
100uF/16V/LOWESR/105C/6.3x11mm_RM2.5 to 2x47uF/6.3V/0805, i.e.
C123||C240, C126||C222 and C135||C223
10. D6 was renamed to D2 and changed to the D4's package.
11. U13 and U15 were changed from SY8008 to SY8009AAAC(SOT23-5).
12. ODT1, SCKE1, SCS1/SA15 and ZQ1 were connected to the 2 DDR
memories with aim to support bigger sizes if one day A40 is
released or A10 is used.
13. All resistor matrices: RM1-RM8 and RM16-
RM21(RA0805_(4X0402)_0R(Board_Mounted)) were removed and the wires
were shortened. The same thing was done for: R106-
R117(0R(Board_Mounted)).
14. The viases that were between GPIO-1 pads 12/14 were removed.
15. The eMMC was placed over the NAND flash.
16. The cream layer was improved.
17. BKUP connector(HN1x2) was added for AXP's power management
option.
18. RM1 and RM2 were added to enable CTP support for the LCD
connector.
19. MP1482DS was exchanged with MP1584EN(SOIC8E). Because of this,
were affected D5, C202, C203 and several other components as well.
20. The files were renamded from 4G to nothing, because the
schematic is universal for all boms generated!
21. C217's value was changed from 220uF/10V/TANT to
220uF/10V/TANT_D!
22. Added reset control for the new PHY – C63 becomes NA down from
10uF, R26 becomes NA down from 10K and R25 is now 100R up from NA.
J (released)
1. Rotated RM1 and RM2 at 90 degrees for better soldering.
2. Created separate design for each of the variants of the board
(1. commercial temperature range and no flash memory – A20-
OLinuXino-MICRO; 2. industrial temperature range and no flash
memory – A20-OLinuXino-MICRO-IND; 3. commercial temperature range
and flash memory – A20-OLinuXino-MICRO-EMMC; 4. industrial
temperature range and flash memory – A20-OLinuXino-MICRO-EMMC-IND)
- each of these boards would have own hardware revision from now
on.
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