mikroElektronika 3.3V-5V VOLTAGE TRANSLATOR MIKROE-258 User manual

MikroElektronika
3.3V-5V VOLTAGE TRANSLATOR™Manual
All Mikroelektronika’s development systems feature a large number of peripheral
modules expanding microcontroller’s range of application and making the
process of program testing easier. In addition to these modules, it is also
possible to use numerous additional modules linked to the development system
through the I/O port connectors. Some of these additional modules can operate
as stand-alone devices without being connected to the microcontroller.
Additional board

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3.3V-5V VOLTAGE TRANSLATOR
The 3.3V-5V VOLTAGE TRANSLATOR additional board is used to adjust voltage levels of a development system
sending voltage signals of 3.3V and a device receiving voltage signals of 5V.
How to connect the board?
The 3.3V-5V VOLTAGE TRANSLATOR board can be easily connected to a development system via a 2x5 connector
CN1 and a at cable with appropriate IDC10 connectors, Figure 1. The board is connected to a device via a 2x5
connector CN2.
How to use the board?
The additional board is used to adjust different voltage levels by means of two transceivers 74LVCC3245. The board
comes with jumpers placed so as to adjust voltage signals of 3.3V to voltage signals of 5V. If necessary, voltage signal
adjustment may also be performed in the opposite direction (from 5V to 3.3V).
The additional board is powered by 3.3V and 5V. The 3.3V power supply voltage is supplied from the development
system, whereas the 5V DC power supply voltage is supplied from an external power supply source via the CN3
connector.
Figure 1: 3.3V-5V VOLTAGE TRANSLATOR board
Figure 3: Flat cable with IDC10 connectors
Figure 2: Connecting IDC10
connector to a development system

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The 3.3V-5V VOLTAGE TRANSLATOR board is capable of bidirectional adjustment of voltage signals, which means
that voltage signals may be sent and received at the same time (from 3.3V to 5V and vice versa). In bidirectional
mode, the position of jumpers depends on the voltage signal direction. For example, if voltage signals are sent from
a development system (3.3V) via the LSV0 pin, to a device (5V) via the HVS0 pin, it is necessary to place jumpers J1
and J9 in the position marked . At the same time, voltage signals may be sent from a device (5V) to a development
system (3.3V). In this case, voltage signals are sent from the HVS1 pin to the LVS1 pin, so that jumpers J10 and J2
should be placed in the position marked . These rules apply to all jumpers provided on the additional board. When
placing jumpers, pay attention to arrows next to jumpers. If arrows are in the opposite directions ( ), voltage signals
will not be properly sent/received (from 3.3V to 5V and vice versa).
Figure 4: 3.3V-5V VOLTAGE TRANSLATOR board connected to a development system
Figure 5: Dimensions of the additional board

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Figure 6: 3.3V-5V VOLTAGE TRANSLATOR board connection schematic

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