OLIMEX© 2017
A20-OLinuXino-LIME2 user's manual
6.8 SATA connector and power
The part of the schematic describing the SATA module is shown below:
SATA connector
Pin # Signal name
Processor pin
1
GND
-POWER CIRCUIT-
2
SATA-TXP
T20
3
SATA-TXM
T21
4
GND
-POWER CIRCUIT-
5
SATA-RXM
U21
6
SATA-RXP
U20
7
GND
-POWER CIRCUIT-
The SATA connector allows you to connect hard drives to
the board. There is support for SATA drives in the official
images. The connector is suitable for both regular hard-
drives and SSD ones.
Note that you can power only 5V hard drives via the
board's 5V_SATA_PWR connector. If your hard drive
requires 12V of voltage you would need to provide
external power supply.
To keep the low form factor we have placed the small JST connector.
You can make an adapter cable accordingly. The other options is to check the SATA-CABLE-SET that we
have available.
For more information please visit:
https://www.olimex.com/Products/Components/Cables/SATA-
Pay note the two jumpers 5V_E_SATA and PC3/PB8 located at the bottom of the board (under the HDMI
connector). The first one 5V_E_SATA is open by default because the board has software control of the
powering for the hard disk. If you close 5V_E_SATA there would always be 5V at the 5V_SATA_PWR
connector.
Which pin does the software control of the SATA powering is determined by the position of the PC3/PB8
jumper. By default PC3 is used.
6.9 GPIO connectors
There are four GPIO ports which are used generally to access unused by the board's peripherals pins.
However, there are exceptions – some of the pins might be used to easily peripherals or their levels.
Three of the GPIO connectors have 40 pins and the last one has 20 pins. Note that all GPIO connectors
have 0.05'' (50 mil) step between pins. Olimex sells a compatible extension cable for these connectors
named CABLE-40-40-10CM.
IMPORTANT: the cables and the 0.05'' connectors are very fragile – if you attempt to disconnect the
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