ATXMEGA32C4-CU - 32MHz 32KB MCU | Microchip Technology
MPN: ATXMEGA32C4-CU ✓ ActiveATXMEGA32C4-CU Overview
A microcontroller is a programmable semiconductor that integrates a processor core, nonvolatile program memory, data memory, and peripherals on one device. In the product hierarchy, the ATXMEGA32C4-CU is an AVR XMEGA 8/16-bit microcontroller, a member of the broader microcontroller and embedded-processing category. Its integration reduces component count in systems that require local control, data acquisition, communications, or low-power peripheral management.
Key features include a 32 MHz maximum operating frequency, 32 KB of Flash organized as 16K by 16, and a 4 KB boot-code section with independent lock bits. Read-while-write Flash operation supports efficient nonvolatile data handling. The device includes 1 KB of EEPROM, 4 KB of SRAM, and 34 I/O lines, while its four-channel event system can route peripheral events directly between timers, comparators, and other functional blocks without unnecessary processor intervention.
The ATXMEGA32C4-CU integrates USB alongside I2C, SPI, UART, ADC, PWM, and DMA capabilities. This combination permits a single controller to manage external sensors, service a USB connection, execute control algorithms, and transfer data with limited processor overhead. Its maximum 32 MHz clock supports time-sensitive embedded tasks, while the event system and DMA channels help preserve CPU capacity for application logic.
Typical applications include industrial sensor controllers, USB-connected data-acquisition equipment, compact automation modules, and embedded control boards requiring multiple serial interfaces. Its 5 mm by 5 mm VFBGA package supports space-constrained designs, but the 0.65 mm ball pitch makes PCB layout, assembly, and inspection more demanding than a leaded or larger-pitch package.
Designers should account for the package's fine-pitch assembly requirements, verify all exposed-pad and ground-ball requirements against the manufacturer datasheet, and provide appropriate USB routing and decoupling. Software migration should also confirm that the selected USB, bootloader, and clock configuration is supported by the exact ATXMEGA32C4 device variant.
This page consolidates the verified manufacturer specifications, distributor availability information, same-package alternative candidates, comparison parameters, and practical design guidance. It also distinguishes confirmed package and memory data from parameters that require direct confirmation in the manufacturer datasheet.
Drop-in alternatives for ATXMEGA32C4-CU — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATXMEGA32C4-CU (same form factor and footprint) — differing in Package, Product Type.
ATXMEGA32A4-CU
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATXMEGA32C3-CU
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATXMEGA32D4-CU
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →ATXMEGA32E5-CU
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATXMEGA32C4-CU Maximum Ratings & Electrical Characteristics
| Product Type | 8/16-bit AVR XMEGA microcontroller |
| Maximum Clock Frequency | 32 MHz |
| Program Memory | 32 KB Flash (16K x 16) |
| Boot Loader Section | 4 KB |
| Data Memory | 4 KB SRAM |
| EEPROM | 1 KB |
| I/O Lines | 34 lines |
| Operating Voltage | 1.6 V to 3.6 V |
| Event System | 4 channels |
| Package | 49-VFBGA, 5 mm x 5 mm |
| Ball Pitch | 0.65 mm |
| Mounting Type | Surface mount |
| Operating Temperature | -40 °C to +85 °C |
| Interface Support | USB, I2C, SPI, and UART |
| Peripheral Support | ADC, PWM, DMA, and event system |
| Flash Feature | In-system self-programmable and read-while-write |
ATXMEGA32C4-CU 49-vfbga, 5 mm x 5 mm Pin Configuration Guide
Pin configuration for ATXMEGA32C4-CU (49-vfbga, 5 mm x 5 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATXMEGA32C4-CU.
Refer to the datasheet for full pin configuration.
Typical Applications
ATXMEGA32C4-CU is suitable for 6 applications: Industrial Sensor and Data Acquisition, USB Connectivity and Configuration, Compact Automation and Motor Control, Communication Gateway and Protocol Bridge, Battery-Powered Portable Instrument, Educational and Evaluation Platform.
Industrial Sensor and Data Acquisition
The ATXMEGA32C4-CU fits industrial sensor controllers because its 32 MHz AVR core can process measurements while the 12-bit ADC, DMA channels, and four-channel event system reduce processor load. The 32 KB Flash stores application firmware and boot code, while 4 KB of SRAM supports working buffers and 1 KB of EEPROM preserves calibration values. At 1.6 V to 3.6 V operation, the device can sit close to low-voltage sensors and converters. A robust implementation should include watchdog recovery, brownout margin, input protection, and calibrated reference design.
Recommended
USB Connectivity and Configuration
The ATXMEGA32C4-CU is appropriate for USB-connected configuration and monitoring modules because USB is integrated into the same device as the AVR core and 32 KB of programmable Flash. Engineers can implement enumeration, control commands, data transfer, and device configuration without a separate USB interface controller. Its 34 I/O lines provide peripheral connectivity, while UART, SPI, and I2C support external sensors and storage. PCB implementation must follow the manufacturer's USB routing, impedance, and decoupling guidance to preserve signal integrity.
Recommended
Compact Automation and Motor Control
The ATXMEGA32C4-CU supports compact automation modules that coordinate sensors, communication ports, and actuators. Its PWM channels are suited to motor, lighting, and proportional-control tasks, while the event system can connect timer and comparator events with reduced software overhead. A 32 MHz operating frequency provides useful control-loop headroom, and the 49-VFBGA package reduces board area in space-constrained equipment. Designers should confirm pin assignment, timer channel availability, output-drive limits, thermal conditions, and any required isolation before attaching external loads.
Recommended
Communication Gateway and Protocol Bridge
The ATXMEGA32C4-CU is suitable for a compact serial gateway because it combines UART, SPI, I2C, USB, DMA, and an event system in one microcontroller. A gateway can translate between a host USB connection and embedded peripherals while the DMA engine moves data without continuous interrupt servicing. Its 32 KB Flash accommodates protocol handlers and a bootloader, although exact firmware size must be checked before deployment. The principal design constraint is the 0.65 mm VFBGA pitch, which requires careful fanout, assembly capability, and production inspection.
Recommended
Battery-Powered Portable Instrument
The ATXMEGA32C4-CU can serve as the control core in a low-power portable instrument because the XMEGA family emphasizes efficient low-power operation and the device includes sleep-capable peripherals plus DMA. Its 1.6 V to 3.6 V supply range supports integration with low-voltage sensors, display interfaces, and serial converters. The 32 MHz clock can be reduced when the application permits, conserving energy during idle periods. Battery-life estimates require actual duty-cycle measurements because the supplied data does not provide complete active and sleep-current curves.
Recommended
Educational and Evaluation Platform
The ATXMEGA32C4-CU is useful for education and evaluation platforms because it exposes a modern AVR XMEGA architecture, USB, multiple serial buses, and event-driven peripherals in a compact 5 mm by 5 mm package. Learners can evaluate mixed-signal acquisition, PWM control, DMA transfers, and USB communication on one controller. The package's 0.65 mm pitch makes it unsuitable for basic solder-breadboard training unless a breakout board is used. A teaching platform should therefore provide routed test points, programming access, expansion headers, and a stable 3.3 V supply.
Recommended
Recommended Products Summary
Engineering reference data for ATXMEGA32C4-CU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATXMEGA32A4-CU | ATXMEGA32C3-CU | ATXMEGA32D4-CU | ATXMEGA32E5-CU |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 49-VFBGA (5x5) | 49-VFBGA (5x5) | 49-VFBGA (5x5) | 49-VFBGA (5x5) | 49-VFBGA (5x5) |
| Maximum Clock Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| I/O Lines | 34 lines | 34 lines | 34 lines | 34 lines | 34 lines |
| Operating Voltage | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| USB and Serial Interfaces | USB, I2C, SPI, and UART | I2C, SPI, UART, and family-specific USB configuration | I2C, SPI, UART, and family-specific USB configuration | I2C, SPI, UART, and family-specific USB configuration | I2C, SPI, UART, and family-specific USB configuration |
Key Differentiators
- Higher Flash capacity than the verified ATXMEGA16C4-CUR relative (vs ATXMEGA16C4-CUR)
- Integrated USB plus three additional serial-interface types (vs ATXMEGA32A4-CU)
- Four-channel event system and DMA support (vs ATXMEGA32D4-CU)
Design Notes
The 49-VFBGA uses a 0.65 mm ball pitch in a 5 mm by 5 mm outline. Route escape paths on layers that preserve continuous ground and power planes, and apply the land pattern, via-in-pad rules, and solder-paste volume specified by Microchip and the PCB assembler. The verified data does not provide the complete recommended footprint, so engineers should not scale a generic BGA land pattern without checking the manufacturer package drawing.
USB operation requires a controlled implementation rather than ordinary digital routing. Follow the manufacturer datasheet's USB trace geometry, reference-plane continuity, decoupling, and connector placement guidance. Keep the MCU and supporting passive components close to their associated pins, avoid placing disruptive switching nodes beneath USB pairs, and verify the completed board for impedance and signal integrity when cable length, data rate, or board complexity increases.
Do not treat the 32 KB Flash figure as 32K words of general-purpose code without checking the memory map and boot section. The verified manufacturer description identifies 16K by 16 organization and a 4 KB boot-code section with independent lock bits. Projects with large display code, protocol libraries, or dual-bank bootloader assumptions should reserve memory explicitly and verify application, boot, signature, and configuration partitions before programming.
Compliance Information
The supplied product and distributor data identifies industrial-temperature operation but does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred from the manufacturer or package suffix.
