Silicon Laboratories C8051T620/2-DK quick start System Clock Sources

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C8051T620/2-DK

7.1. System Clock Sources

The C8051T62x/32x devices feature a calibrated internal oscillator that is enabled as the system clock source on reset. After reset, the internal oscillator operates at a frequency of 48 MHz (±1.5%) by default but may be configured by software to operate at other frequencies. Therefore, in many applications, an external oscillator is not required. However, if you wish to operate the C8051T62x/32x device at a frequency not available with the internal oscillator, an external oscillator source may be used. Refer to the C8051T620-21_T320-3 or C8051T620-23_T326- 27 data sheet for more information on configuring the system clock source.

7.2. Switches, LEDs, and Potentiometer (J9, J10, and J12)

Three switches are provided on the motherboard. The RESET switch is connected to the RST pin of the C8051T62x/32x. Pressing RESET puts the device into its hardware-reset state. The switch labeled “SW1” can be connected to the C8051T62x/32x's general-purpose I/O (GPIO) pins P0.1 and P2.0, and “SW2” can be connected to the C8051T62x/32x's general-purpose I/O (GPIO) pins P1.0 and P2.1 through header J9. Pressing a switch generates a logic low signal on the port pin. Remove its shorting block from the J9 header to disconnect the switch from the port pin.

Seven LEDs are also provided on the motherboard. The red LED labeled “PWR” (D4) is used to indicate a power connection to the motherboard. The green LED labeled “RUN” (D10) turns on when the debug circuitry is in a running state; the red LED labeled “STOP” (D11) turns on when the debug circuitry is in a halted state, and the orange LED labeled “DEBUG PWR” (D12) indicates whether the debug adapter circuit is being powered through P5's USB connector. The red LED labeled “VPP” (D7) indicates when the VPP programming voltage is being applied to the device. The green LEDs, labeled “LED1” (D1) and “LED2” (D2), can be connected to C8051T62x/ 32x's GPIO pins through header J10. Remove its shorting block from the header to disconnect an LED from the port pin. The red LED labeled “USB ACTIVE” (D13) will turn on whenever the CP2103 USB-to-UART bridge is connected to a PC and has successfully completed enumeration.

Also included on the C8051T62x Motherboard is a 10 kΩ thumbwheel rotary potentiometer, reference number R8. The potentiometer can be connected to the C8051T62x/32x's P2.5 pin through the J12 header. Remove the shorting block from the header to disconnect the potentiometer from the port pin.

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Contents About the Daughter Boards Kit ContentsC8051T620/2-DK Hardware SetupDevelopment Tools Installation Software InstallationCP210x USB to Uart VCP Driver Installation System RequirementsEvaluation Toolset Software OverviewSilicon Labs IDE Creating a New Project Configuration WizardToolStick Terminal Programming UtilitiesRegister Definition Files Example Source CodeBlinking LED Example Development Boards C8051T62x Motherboard C8051T62x EDB C8051T320 QFP32 Socket Daughter Board C8051T327 QFN28 Socket Daughter Board System Clock Sources Switches, LEDs, and Potentiometer J9, J10, and J12Motherboard I/O Descriptions Power Supply Headers J6 and J7USB Debug Adapter DEBUG/P5 Port I/O Connectors J2, J3, J4, and J5Uart to USB Communications Interfaces COMM/P4 Communications Interface Selector Headers J8 and J11VPP Connection J15 Analog I/O J1 and J14Using Alternate Supplies with the C8051T62x Development Kit C8051T62x Motherboard Schematic 1 SchematicsC8051T62x Motherboard Schematic 2 C8051T62x Emulation Daughter Board Schematic C8051T620 QFN-32 Daughter Board Schematic C8051T622 QFN-24 Daughter Board Schematic C8051T320 QFP-32 Daughter Board Schematic C8051T321 QFN-28 Daughter Board Schematic C8051T326 QFN-28 Daughter Board Schematic C8051T327 QFN-28 Daughter Board Schematic Revision 0.3 to Revision Revision 0.2 to RevisionContact Information

C8051T620/2-DK specifications

Silicon Laboratories C8051T620/2-DK is an advanced single-chip microcontroller designed for high-performance embedded applications. Built around the robust C8051 architecture, this microcontroller integrates a powerful 8051 core with advanced peripherals, providing developers with a versatile platform for a range of application needs.

One of the standout features of the C8051T620/2-DK is its high-speed performance. The microcontroller can operate at clock speeds up to 100 MHz, significantly faster than standard 8051 microcontrollers. This capability enables the execution of complex algorithms and real-time processing tasks with ease. Moreover, the architecture boasts a 16-bit timer/counter that enhances the ability to manage timing-critical applications effectively.

The C8051T620/2-DK comes equipped with up to 64 KB of on-chip Flash memory, facilitating the storage of essential program code and data. This generous memory allocation allows developers to implement larger, more sophisticated programs without relying on external memory, thereby simplifying design and improving reliability. Additionally, the on-chip RAM can be up to 4 KB, providing ample space for executing variables and stack operations.

In terms of connectivity, the C8051T620/2-DK supports a slew of communication protocols, including UART, SPI, and I2C. This versatile communication capability enables seamless integration into various systems, allowing for easy data exchange with other devices, sensors, and peripherals.

Furthermore, the microcontroller includes an extensive range of integrated analog peripherals, such as a 12-bit ADC, which enhances the device’s ability to interface with analog signals in automotive, industrial, and consumer applications. The presence of PWM outputs also allows for precise control of motors and other actuators, making it an excellent choice for complex control systems.

Silicon Laboratories has designed the C8051T620/2-DK with energy efficiency in mind. The microcontroller supports multiple power-saving modes, enabling developers to optimize their designs for low power consumption. This feature is particularly valuable in battery-operated devices, where maintaining power is crucial for extending operational life.

Overall, the Silicon Laboratories C8051T620/2-DK provides a powerful, flexible, and energy-efficient solution for embedded systems. Its high-speed performance, large memory, extensive connectivity options, and robust analog capabilities make it an ideal choice for engineers and developers looking to create innovative embedded applications in diverse industries.
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