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4 control connector, 5 power connector – DekTec DTM-3237 DVB-S2 Receiver User Manual

Page 12

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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.