CY8CKIT-059 datasheet(23/48 Pages) CYPRESS

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CY8CKIT-059 PSoC® 5LP Prototyping Kit Guide, Doc. #: 001-96498 Rev. *G

Hardware

4.2.3

Power Supply System

The power supply system on this board is dependent on the source of the power. For most

applications, you can use the 5-V supply from the USB connection to power the system. You can

also connect an external power supply to the board for low-voltage applications. The kit supports the

following connections:

■

5 V from the KitProg USB

■

5 V from the PSoC 5LP target USB (this will not power the KitProg section of the board)

■

3.3 V to 5.5 V from a regulated supply connected to VDD (this will not power the KitProg section

of the board)

Note: To use an external power supply, while KitProg is connected to the PCB USB, remove diode,

D1, from the board. This ensures that VTARG supply from KitProg is not supplied to the target

device. KitProg measures the target voltage and adjusts the logic levels on the programming pins

accordingly.

This prototyping kit does not have an onboard ESD protection circuitry. Therefore, the power source

for the PSoC 5LP Prototyping Kit must be of a high quality to ensure that the board is protected from

any over-current conditions and swapped-power connections.

4.2.3.1

Measure PSoC 5LP Current Consumption

You can measure the current consumption of the PSoC 5LP device by using one of these methods:

Method 1:

1. Separate the KitProg board by 'snapping' the perforated edge between the two boards.

2. Power the remaining prototyping board via any of the VDD or VTARG terminals.

3. Place an ammeter in series with the VDD or VTARG connection to measure the current

consumption.

Method 2:

1. Remove the resistor R20 and install a 2-pin jumper in the supplied holes of J4.

2. Connect an ammeter across the 2-pin jumper to measure the current to the PSoC 5LP device.

This method can be used either with USB power or with power supplied to one of the VTARG pins

but not when supplying to one of the VDD pins.

CY8CKIT-059 数据表(PDF) 23 Page - Cypress Semiconductor

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