Technical Manual

Company Confidential 11 Raveon Technologies Corp.
4. Electrical Inputs and Outputs
4.1. LEDs
Status LED (TX) This LED blinks red when the transmitter keys and is putting out RF
power. It blinks green upon the reception of data or RF carrier. It turns orange when
decoding a paging message.
Power LED (PWR) This LED does a short blink, once every two seconds, indicating
to the user that the power to the modem is ON and the modem is working. When the
modem is in the command mode, this LED will blink on and off, once per second.
4.2. I/O Pinout
The I/O connector is a 20-pin header, 2mm pin spacing. Pin-out and connector type
compatible with MaxStream 9XTend.
Pin #
Function
I/O
Function
1
GND
-
Ground. Connect to power ground (negative)
2
Vcc
I
DC Input
3
CD
O
Carrier Detect Out. Low for carrier. Logic high for no carrier. RF or
DATA carrier detect set with ATR1 command. Default: RF RSSI.
4
TX On
O
Pin is High when module is transmitting. Low when off, receiving, or
sleeping.
5
Data In (TXD)
I
Transmit data input.
6
Data Out (RXD)
O
Receive data output.
7
Enable
I
Low (<.7V) to shut down the module. High (>2.5V) to enable it.
8
DTR/Sleep
i
Product Sleep input. When enabled and used, the unit can restart
faster than turning the DC power on and off.
9
CTS
O
Clear to send output. Indicates state of internal input buffer.
ATJF command sets the threshold where CTS is negated.
10
RTS
I
RTS input for serial flow control.
In audio pass-through mode, functions as PTT. 0=TX, 1=RX.
11
RSSI
0
Receiver signal strength indicator
12
3.3V out
O
3.3V out of the M6 module. 50mA max current draw.
13
IOA
AUDIO IN
I/O
General purpose digital I/O. 3V digital logic from CPU on M6. If the
Audio option is used, this pin is used to input transmit audio.
14
IOB
I/O
General purpose I/O. 3V digital logic from CPU on M6. By default
functions as DSR. 0= ready&running. 1=sleeping. If enable=0, this
line will =0.
15
Decode Mode
I
3V digital logic with 10k pull-up.
High/open = POCSAG paging receive mode,
Low/ground=data modem mode.
This feature enabled by setting the alternate protocol with the ATMA
command.
16
STAT1
O
Output to drive external dual-color LED. Connect led between
STAT1 and STAT2.
17
Unused. Do not connect to anything.
18
STAT2
O
Output to drive external dual-color LED. Do not connect the LED to
ground or DC voltage.
19
GND
-
System Ground to M6
20
Unused. Do not connect to anything.