CY8CKIT-030 Cypress Semiconductor Corp, CY8CKIT-030 Datasheet - Page 28

• Manufacturer Part Number: CY8CKIT-030
• Description: BOARD EVAL PSOC 3
• Manufacturer: Cypress Semiconductor Corp
• Series: PSOC™ 3r
• Type: MCUr

Specifications of CY8CKIT-030

• Contents: Board, Cables, Display, Software
• Processor To Be Evaluated: CY8C38 Family
• Processor Series: CY8C38
• Interface Type: I2C, SPI, UART
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 1.8 V to 5.5 V
• Core Architecture: 8051
• Silicon Core Number: CY8C38xxx
• Silicon Family Name: PSoC
• Kit Contents: Board, LCD, Cable, CD, Guide
• Features: High Precision Analog
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PSoC® 3
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 428-3090

Example Projects
5.1
5.1.1
5.1.2
5.1.3
28
Voltage Display
Project Description
This example code measures a simple analog voltage controlled by the potentiometer. The code
uses the internal Delta-Sigma ADC configured for a 20-bit operation; the ADC range is 0 to Vdda.
The voltage measurement resolution is in microvolts. The results are displayed on the character
LCD module.
Note The PSoC 3 Development Kit is factory-programmed with the Voltage Display example
project.
Hardware Connections
The example requires the character LCD on P8. Because it uses the potentiometer, the jumper
POT_PWR should be in place. This connects the potentiometer to the Vdda.
Del-Sig ADC Configuration
Figure 5-2. Delta-Sigma ADC Configuration
The Del-Sig ADC is configured as follows:
■
■
■
Continuous mode of operation is selected because the ADC scans only one channel.
Conversion rate is set to 187 samples/sec, which is the maximum sample rate possible at 20-bit
resolution.
Range is set to Vssa to Vdda in single ended mode because the potentiometer output is a single
ended signal that can go from 0 to Vdda. Therefore, at 20-bit resolution, the ADC will resolve in
steps of Vdda/2
20
.
CY8CKIT-030 PSoC 3 Development Kit Guide, Doc. # 001-61038 Rev. **