GETTING STARTED WITH THE MTQ-LEU7-B02
14
Dragonfly
TM
MTQ-LEU7 Device Guide
Communications Flow
No Processor Model (B02)
Note:
Simultaneous serial and USB communication is allowed on this LEU7 device.
Communicating with the Device
Following are three options for communicating with the device.
Install USB drivers and plug into the micro USB connector. No need for a host board.
Access the device's USB interface via pins 6 and 7 of the 40-pin connector. Data pins 6 and 7 are in parallel
with the micro USB connector on the device. There is no connection to pins 6 and 7 on the developer board.
Establish serial communication using Multitech developer board MTUDK2. See the
Universal Developer Kit
2.0 Developer Guide
(PN S000610) for more information.
Powering Down The Device
CAUTION:
Failing to properly power down the device before removing power may corrupt your device's file
system.
To properly power down your device, use the following sequence:
1.
Issue the AT+QPOWD command or hold the reset line (pin 35) low.
2.
Wait up to 65 seconds for POWERED DOWN message or until RADIO_VDD (pin 27) goes low.
3.
Remove power to the MTQ.
Device Reset (Pin 35)
Minimum pulse is 50 ms.
- If the reset line is held low for >50ms the radio is turned off.
- When the reset line is released, the radio is turned on.
Note:
A supervisory processor handles this function as issuing a direct reset to the radio is not recommended.
