Specifications

Product Technical Specification & Customer Design Guidelines
Interfaces
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prior written agreement.
WA_DEV_Q64_PTS_001-003 January 9, 2009
3.7 Auxiliary Serial Link (UART2)
An auxiliary serial interface (UART2) is available on Q64. This interface may be used
to connect a Bluetooth or a GPS chip controlled by an Open AT
®
Plug-in.
3.7.1 Features
Maximum baud rate of the UART2 is 921 Kbit/s.
The signals are as follows:
• TX data (DTM3)
• RX data (DFM3)
2-wire serial interface hardware design:
• DTM3*, DFM3*
• Please configure the AT command (AT+IFC=0,0) to start accessing UART2.
• Please refer to the document [4] AT Command Interface Guide for Open AT
®
Firmware v6.5
.
3.7.2 Pin Description
Signal Pin
number
I/O I/O type Reset
state
Description
DTM3*
43
I 2V8-2 Z Transmit serial data
DFM3*
44
O
2V8-2
Z Receive serial data
GND*
2, 4, 6,
8, 10, 12
GND Ground
* According to PC view
See chapter
3.4, “Electrical Information for Digital I/O” on page 30 for 2V8-1, 2V8-2, pull-up and open drain
voltage characteristics and for Reset state definition.