C8051T322-GQ

Overview

The C8051T322-GQ is a full-speed USB EPROM microcontroller from Silicon Labs, featuring an 8051 core with up to 48 MHz clock speed and 48 MIPS throughput. It includes up to 64 kB byte-programmable EPROM code memory and up to 3328 bytes internal data RAM. The device integrates a USB 2.0 function controller with eight flexible endpoints and 1 kB buffer memory. Digital peripherals include 25 port I/O pins, two enhanced UARTs, hardware-enhanced SPI, SMBus, four 16-bit timers, and a 16-bit PCA with five capture/compare modules. Analog features comprise two comparators with programmable hysteresis and response time. Operating voltage ranges from 1.8 V to 5.25 V, with an operating temperature range of –40 °C to +85 °C.

Feature Summary

• Integrates a high-speed 8051 microcontroller core with pipelined instruction architecture for efficient processing.
• Includes a full-speed USB 2.0 compliant function controller with integrated transceiver and clock recovery.
• Features on-chip debug circuitry facilitating non-intrusive in-system debugging and firmware updates.
• Provides versatile digital and analog peripherals including multiple serial interfaces, timers, and comparators.

Applications

• Embedded USB connectivity solutions
• Code development platforms using C8051F34A
• In-system debugging applications

Procurement Notes

Verify the specific package variant (LQFP-32) against project requirements. Confirm that the EPROM memory type aligns with reprogramming needs. Ensure the supply voltage range matches the target system design. Check for any end-of-life notices or recommended new designs warnings associated with this component family before finalizing procurement plans.

Selection Notes

Select this component when a robust 8051 core combined with native USB functionality is required. Consider the EPROM memory for applications needing field-upgradable firmware. Evaluate the available GPIO count and peripheral set against interface demands. Verify compatibility with existing development tools like the C8051F34A platform.

Part Context

This part belongs to the C8051T620/1/6/7 & C8051T320/1/2/3 family of full-speed USB EPROM MCUs. These devices are designed for single-chip USB integration without external components. The family shares common specifications such as the CIP-51 core and similar peripheral sets, differentiated by memory size and package options.

Replacement Considerations

Check for official replacement recommendations from Silicon Labs due to potential end-of-life status. Evaluate alternative MCU families with similar USB and 8051 core characteristics if direct substitutes are unavailable.

FAQ

Does the C8051T322-GQ require external components for USB operation?

No, it features an integrated transceiver and clock recovery, eliminating the need for external resistors, crystals, or voltage regulators for USB functionality.

What is the maximum clock frequency supported by the C8051T322-GQ?

The device supports a maximum clock frequency of 48 MHz, delivering up to 48 MIPS throughput.

Can the EPROM memory be reprogrammed in the field?

Yes, the EPROM can be programmed from firmware running on the device, allowing for in-application programming and field upgrades.