Propox CY8C21 Series, User Manual

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4. Power Supply
The board should be supplied from external supply with voltage 7..12V AC, or 9..15V DC,
using a standard plug with bolt diameter 2.1mm placed in the supply socket.
The board may be supplied form 3.6V accumulator . Shorting Backup jumper enable
powering directly from accumulator, shorting VBAT jumper enable powering with Switch
Mode Pump Mode. Second option is to power device from external battery using SMP
connector placed on board.
Stabilized voltage VTG is accessible on the connectors of the board extensions.
There are two jumpers placed on the board: SUPPLY and 3V3. The closure of the 3V3 jumper
results in all the circuits being supplied with 3.3V voltage (it can be regulated by 3V3
potentiometer from
1.8V to 3.3V ), by the open jumper the voltage will be 5V.
SUPPLY jumper gives the opportunity of connecting voltage omitting the circuits of the bridge
and the regulator.
SMP is a system which can be used as a part of a voltage regulator. For example, it is possible to
supply power to a PSoC microcontroller from a single 1.5V battery.
In the case of battery suply Switch Mode Pump (SMP) system can be used. Its operation is based on
principle of BOOSTDC/DC convertor. This type of convertor gives voltage supply value higher than
battery voltage, which makes possible power suplly with 1.5V battery. For SMP to function properly, it
is necessary to connect, beside battery, a diode, inductivity and a capacitive.