30
GETTING TO KNOW YOUR E
cho-40F
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cho-40F
User Manual
2.4.8 CN18 : Mini PCIe, mSATA
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.
IP11 Pin-43 is defined for switching mSATA/ Mini PCIe device, the header
definitions are listed in the following table :
CN18
JP11
Header
Interface
1-2
Auto Detection
2-4
Mini PCIe
1-3
mSATA
