CY8CKIT-020 Cypress Semiconductor Corp, CY8CKIT-020 Datasheet - Page 54

• Manufacturer Part Number: CY8CKIT-020
• Description: KIT PSOC CY8C28 FAMILY PROCESSOR
• Manufacturer: Cypress Semiconductor Corp
• Series: PSoC®r
• Type: MCUr

Specifications of CY8CKIT-020

• Contents: Board, Software and Documentation
• Silicon Manufacturer: Cypress
• Core Architecture: PSoC
• Features: Programmable System-on-chip Design Methodology And Architecture
• Kit Contents: PSoC CY8C28 Module, Doc, CD
• Silicon Core Number: CY8C28
• Silicon Family Name: PSoC
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: CY8C28 Family
• Lead Free Status / Rohs Status: Supplier Unconfirmed
• Other names: 428-3036

Board Specifications and Layout
2.1.2.5
2.1.2.6
54
Setting a 5V Supply from VBUS
1. Place the jumper on J8 header to select VBUS as the source.
2. Move the VDD select switch to select the 5V.
3. Place the jumper on J6 header to select VDD as source for VDD ANLG.
4. Place the jumper on J7 header to select VDD as source for VDD DIG.
Note 5V operation is not recommended with ES1 Silicon. See the silicon errata for details.
Figure 2-5. Setting a 5V Supply from VBUS
Setting a 3.3V Supply from VBUS
Due to the nature of the PSoC Development Board, powering the system from USB 'VBUS' could
potentially reset other USB devices on the same hub.
By design, the PSoC Development Board is capable of drawing more than 500mA of current during
normal operation, which exceeds USB bus power limits. Additionally, the development board
exceeds inrush current limits due to 'VBUS' capacitance greater than 10uF. As a result, plugging the
PSoC Development Board into a USB hub could potentially cause other devices on the same hub to
reset due to excessive inrush currents. Careful consideration should be taken when powering the
PSoC Development Board from 'VBUS'. In general, it is good practice to plug the PSoC Develop-
ment Board into a host root hub, or a "self-powered" external hub when doing USB development.
Bus powered applications done outside the realm of the PSoC Development Board should comply to
the USB specification for inrush current limits and recommended bulk capacitance on 'VBUS'. See
the
1. Place the jumper on J8 header to select VBUS as the source.
2. Move the VDD select switch to select 3.3V.
3. Place the jumper on J6 header to select VDD as source for VDD ANLG.
4. Place the jumper on J7 header to select VDD as source for VDD DIG.
Universal Serial Bus Specification Revision 2.0
CY8CKIT-020 PSoC Development Kit Guide, Doc. # 001-56971 Rev. **
for more details.
SELECT VDD AS SOURCE
FOR VDD DIG
SELECT VBUS AS SOURCE
MOVE VDD SELECT
SWITCH TO 5V
SELECT VDD AS SOURCE
FOR VDD ANLG