Q2686 Wavecom, Q2686 Datasheet - Page 38

• Manufacturer Part Number: Q2686
• Description: Wireless CPU
• Manufacturer: Wavecom

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3.7 Auxiliary Serial Link (UART2)
For future applications (e.g. Bluetooth connectivity) an auxiliary serial interface
(UART2) will be available on the Q2686 product.
See Chapter 3.3, “Electrical information for digital I/O” for Open drain, 2V8 and 1V8 voltage
characteristics and Reset state definition.
* According to PC view
The Q2686 is designed to operate using all the serial interface signals. In
particular, it is recommended to use RTS and CTS for hardware flow control in
order to avoid data corruption during transmission.
The maximum baud rate of UART2 is 115 Kbit/s for the firmware 6.60 and 921
Kbit/s for the later firmware versions.
For use with 2-wire serial interface
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.
WM_PRJ_Q2686_PTS_001-007
~CT106 /
~CT105 /
CT103 /
CT104 /
TXD2*
RXD2*
CTS2*
RTS2*
•
•
•
•
•
•
•
Signal
(and forbidden for AT command or modem use)
configure the AT command (AT+IFC=0,0 see AT commands interface
Guide [7]).
[7] for more information.
This case is possible for connected external chip, but not recommended
The external chip must be a flow control.
CT103/TXD2*, CT104/RXD2*
The signals ~CT105/RTS2*, ~CT106/CTS2* are not used, you must
The signal ~CT105/RTS2* must be configured at low level.
Other signals and their multiplexes are not available.
Please refer to technical appendixes in the AT commands interface Guide
number
Pin
31
30
32
33
confidential ©
UART2 interface pin description
I/O
O
O
I
I
I/O type
1V8
1V8
1V8
1V8
Reset
state
Z
Z
Z
Z
Transmit serial data
Receive serial data
Request To Send
Clear To Send
Description
Q2686 Wireless CPU
Multiplexed
Interfaces
GPIO14
GPIO15
GPIO16
GPIO17
with
March 6, 2007
Page: 37 / 87
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