DekTec DTM-3237 DVB-S2 Receiver - Manual (Page 12)

DTM-3237 – OEM DVB-S2 Receiver with DVB-ASI Output
User Manual
12
3.4.4 Control connector
The pinning of the control connector is shown in the table below. It’s a dual row pin header for
connecting the LVTTL serial control port or I 2 C control bus.
Pin Function Pin Function
1 LVTTL serial control port TX 2 LVTTL serial control port CTS
3 LVTTL serial control port RX 4 LVTTL serial control port RTS
5 NC 6 NC
7 GND 8 I 2 C SCL
9 I 2 C SDA 10 I 2 C SCL
The pinning of this connector in the table above must be read from the DTM-3237’s point of view.
For example: Pin 1 TX is the DTM-3237 transmitter pin, which should be connected to the RX pin on
the equipment which uses the DTM-3237.
An I
2 C controller can be connected to SDA and SCL on pin 11 and 12, with signal ground on pin 9.
3.4.5 Power connector
The DTM-3237 must be powered from an external source with a voltage of 12V DC. Power
consumption is max. 5W without the LNB power enabled. Two power connectors are available,
connector 6 and 7. Please refer to §3.1- Physical layout for the connector layout. The pinning of these
power connectors is shown below.
Connector 6 – Pin header 2.54 mm pitch
Pin Function Pin Function
1 +12V DC in 2 +12V DC in
3 Ground 4 Ground
4 Reset 6 Reset
Connector 7 - Molex KK series 2.54 mm
pitch
Pin Function
1 +12V DC in
2 Ground
3 Reset
The board can be reset by pulling the reset pin to ground for at least 100ms. The reset pin is connected
with a resistor to the 12V DC input voltage. When connecting a driver to the reset pin of the DTM-
3237, make sure it is 12V tolerant. To trigger a reset, the voltage on the reset pin shall be 700mV or
less.