CQ7-A30
CQ7-A30 - Rev. First Edition: 1.0 - Last Edition: 2.0 - Author: S.B. - Reviewed by G.G. Copyright © 2016 SECO S.r.l.
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SRST# signal (pin 15 of connector CN41) can have two different routings, depending on the settings of
jumper JP24
Two other 3-way jumpers can be used to place a pull-up or pull-down resistor on signals MFG_NC3 and
MFG_NC4.
When MFG_NC1 and MFG_NC2 signals are not routed to connector CN41 (i.e., jumpers JP20 and JP21 are set to position 2-3), then it is
possible to have a debug USB port on mini-B USB connector CN42
This debug USB port is realised converting the Debug UART signals to USB by using a Silicon Labs
®
CP2104 USB-to-UART bridge.
By using Silicon Labs
®
VCP drivers on the PC connected to this USB port (drivers available at
http://www.silabs.com/products/interface/usbtouart/Pages/usb-to-
, the debug USB port will be exploitable by any COM port application, exactly like if it were a standard serial port. Please remember that Qseven
®
module will have to work in device (i.e. client) mode.
JP24 position SRST# connected to
1-2
RSTBTN# signal
2-3
MFG_NC4 signal
JP18 position MFG_NC3 pull-up / pull-down
1-2
10k
Ω
pull-up to +3.3V_S
2-3
10k
Ω
pull-down
JP19 position
MFG_NC4 pull-up / pull-down
1-2
10k
Ω
pull-up to +3.3V_S
2-3
10k
Ω
pull-down
