Cypress Semiconductor CY3280-MBR3 ユーザーズマニュアル
CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B
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Hardware
2. Remove the USB cable connected to the kit.
3. Desolder (unpopulate) resistors R84 and R85 (
), which were previously loaded for
externally regulated mode operation.
4. Connect the USB cable to the kit and apply the EZ-Click configuration with the Supply Voltage (V)
parameter as 1.8-5.5, as shown in
Note: To operate the kit in internally regulated mode, the Supply Voltage (V) parameter should
be selected as 1.8-5.5, as shown in
be selected as 1.8-5.5, as shown in
4.3.3.2
Protection Circuit
The power supply rail has reverse-voltage, overvoltage, and short-circuit protection features.
■
The PTC resettable fuse is connected to protect the computer's USB ports from overcurrent; see
.
Figure 4-9. USB Power Supply Section Schematic Snippet
■
D2 – A series protection diode to ensure there is no back power to the header; see
.
■
U4 – A PolyZen protection device (ZEN056V075A48LS) that protects the kit against overvoltage
and reverse voltage from the headers; see
and reverse voltage from the headers; see
Caution: There is no protection on the current measurement jumper, test points, and I/O pins. Do
not apply more than 5.5 V on these ports.
not apply more than 5.5 V on these ports.
4.3.3.3
Procedure to Measure the CY8CMBR3116 Current Consumption
This kit provides a way to measure the current consumption of both the whole kit and the
CY8CMBR3116 device individually, without soldering. There are two separate jumpers on the board
for this purpose.
CY8CMBR3116 device individually, without soldering. There are two separate jumpers on the board
for this purpose.