Q2406 Datasheet, PDF (19/81 Pages) List of Unclassifed Manufacturers – SELF CONTAINED E GSM/GPRS 900/1800 OR 850/1900 BI BAND MODULE

WM_PRJ_Q2400_PTS_002 - 002
24th January 2003
Pin description
Signal
Pin
I/O
number
I/O type
Description
CT103/TXD1
39
I
CMOS Transmit serial data
CT104/RXD1
32
O
1X
Receive serial data
CT105/RTS1
30
I
CMOS Ready To Send
CT106/CTS1
37
O
1X
Clear To Send
CT107/DSR1
36
O
1X
Data Set Ready
CT108-2/DTR1
34
I
CMOS Data
Terminal
Ready
CT109/DCD1 *
51
O CMOS / 2X Data Carrier Detect
CT125/RI1 **
54
O CMOS / 2X Ring Indicator
CT102/GND Shielding
legs
Ground
* Multplexed with GPIO3
** Multplexed with GPIO2.
The rising time and falling time of the reception signals (mainly CT103) have to
be less than 200 ns.
The Q24x6 Series have been designed to be operated using all the serial
interface signals. In particular, it is necessary to use RTS and CTS for hardware
flow control in order to avoid data corruption during transmission.
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