18
GETTING TO KNOW YOUR EMBC-1000
©Vecow EMBC-1000 User Manual
2.2.6 CN4 : Mini PCIe, mSATA
Connector
Pin No.
Description
Pin No.
Description
JUSB2
1
USB_VCC
6
USB_D_7N
2
USB_VCC
7
USB_D_7P
3
USB_VCC
8
GND
4
USB_D_6N
9
GND
5
USB_D_6P
10
GND
Both mSATA and Mini PCIe share the same form factor and similar electrical
pinout assignments on their connectors. There was no clear mechanism to
distinguish if a mSATA drive or a Mini PCIe device is plugged into the socket
until recently that SATA I/O issued an ECN change (ECN #045) to redefine pin-
43 on mSATA connector as “no connect” instead of “return current path” (or
GND).
When an mSATA drive is inserted, its pin-43 is “no connect”, and the respective
pin on the socket is being pulled-up to logic 1. When a Mini PCIe device is
inserted, its pin-43 forces the respective pin on the socket to ground, or logic 0.
2
1
2
10
1
9
CN4
