EVOC EC4-1812CLDNA, Manual, Page: 17 / 68

Chapter 2 Installation
EC4­1812CLDNA ­ 13 ­
Digital I/O Interface
GPIO1 is a 2×5Pin (2.0mm) digital I/O interface and the table below shows the pin
definitions of the interface.
SATA Interface
The board provides two standard SATA interfaces, which adopt fool­proof design and
could be used to connect with SATA hard disk; users shall pay attention to the
direction of the socket and insert it gently. The table below shows the pin definitions
of the interface, A1~A7 are interfaces for SATA data cables while B1~B15 are SATA
power interfaces.
Pin Signal Name Pin Signal Name
A1 GND B5 GND
A2 TX+ B6 GND
A3 TX­ B7 +5VL
A4 GND B8 +5V
A5 RX­ B9 +5V
A6 RX+ B10 GND
A7 GND B11 NC
B1 NC B12 GND
B2 NC B13 NC
B3 NC B14 NC
SATA1/SATA2
B4 GND B15 NC
Note: when using on­board SATA power interface to supply power for SATA hard
disk, only 2.5″ SATA hard disk is supported; when using external power, both
2.5″ hard disk and 3.5″ hard disk are supported.
Pin Signal Name Pin Signal Name
1 INPUT0 2 OUTPUT0
3 INPUT1 4 OUTPUT1
5 INPUT2 6 OUTPUT2
7 INPUT3 8 OUTPUT3
GPIO1
9 GND 10 NC