Connectors & Jumpers - MDB USB Standard

The MDB-USB Standard can be jumpered for various functionalities. The jumpers are easy to find if you open the case.

"USB Power In" is used to communicate with the interface and by default, to power the interface. If there is the need to power the device from MDB, it is necessary to change the jumpers' configuration, please refer to the jumper section below.

Connector	Description
1	USB Connector , this connector is used for data communication with the host and also powers the unit (5V, up to 500mA)
2	TTL Connector (3v3 Uart). Is also used as an input for Auto Mode.
3	MDB Connectors - VMC (left) and Peripheral (right) 'VMC', is an MDB master interface suitable to BE a VMC and connect peripherals, and the right connector labelled 'Peripheral' is an MDB slave port which usually connects to a VMC or other MDB master

All Jumpers and what they mean - New Version

Jumper	Name	Description
1	Firmware Update	When closed, automatically sets up the device to Firmware Update Mode
2	Master/Slave Jumper	These jumpers bridge the two MDB connectors (Master and Slaver). Jumper should normally be installed (they are necessary for sniffing). Remove them if you need separate master and slave functionality (also known as Split Mode). NOTE: These jumpers must be set horizontally according to the direction of the schematic above.
3	Ground	These jumpers are to connect all the grounds (if needed) and has to be vertically

Single/Sniffer Mode

This mode is suitable for situations where the MDB-USB Ultra is to operate either in Slave Mode or Master Mode Only. It is also possible to use sniffer mode with this configuration, either in coexistence with Master or Slave, or alternatively Only Sniffer. To have such configuration, jumper set 2 must be inserted.

Split Mode

Split mode is a special mode where the MDB USB acts as a peripheral to the Vending Machine and as a Vending Machine to the payment devices. This is typically only needed when the device is performing some sort of integration between otherwise incompatible MDB elements. To configure this mode, jumper set 2 must be removed.

This mode does not allow sniffing.

Old Version

Connectors

Connector	Description
1	USB Power In
2	MDB Connectors

All Jumpers and what they mean - Old Version

Jumper	Name	Description
1	Firmware Update	Sets the device to Update mode
2	Debug Port	Debug port of the device
3	CPU PWR Selector 1	When Jumper 4 is Closed you can switch between the MDB and USB power supply; If closed on bottom 2 pins = USB Power If closed on top 2 pins = MDB Power
4	GND Bind Jumper	Must be set when MDB USB is powered from MDB. Connects MDB GND level with USB GND Level. Useful for situations where MDB-USB is drawing its power from the MDB Bus or the USB (type A) is used to power the host.
5	Host Jumper	Enables VMC Host interface. Set this jumper if you are a Host/VMC/Master
6	VMC/Peripheral Bridge	These jumpers bridge the two MDB connectors (Master and Slaver). Jumper should normally be installed (they are necessary for sniffing). Remove them if you need separate master and slave functionality (also known as Split Mode). NOTE: These jumpers must be set horizontally according to the direction of the schematic above.

All Modes on the MDB-USB Standard

Below you can find how to physically setup your Qibixx Interface for the various supported modes!

Master Mode - Jumpers 5 and 6 installed:

This jumper is adding a current source to the TX line on the master interface. This is necessary if the interface is the master on an MDB bus.

Slave/Sniffing Mode - Jumpers 6 installed

Both MDB connectors will be setup as Slave;

You can use either one for Sniffing or Peripheral Roles;

Split Mode - Jumper 5 installed

Use both MDB connectors for independent modes:

Left MDB connector will be Master;
Right MDB connector will be Slave;

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