ATXMEGA32A4-MH
ATXMEGA32A4-MH - 32MHz AVR Microcontroller | Microchip Technology
Microchip Technology ATXMEGA32A4-MH is an 8/16-bit AVR XMEGA A4 microcontroller operating up to 32 MHz with 32 KB of self-programming Flash memory and a 44-VQFN 7 x 7 mm package. The device includes 4 KB of boot-code section space, 4 KB SRAM, 1 KB EEPROM, a four-channel DMA controller, an eight-channel event system, and an external bus interface. Its operating-voltage information spans 1.6 V to 3.6 V, while one distributor specification lists a 2.7 V to 3.6 V supply range for this package.
An 8/16-bit AVR microcontroller is a compact embedded-processing component within the microcontroller, semiconductor, and embedded-systems hierarchy. The ATXMEGA family combines a Harvard-style RISC core, memory, timers, communication peripherals, and general-purpose I/O in one package. Compared with larger 32-bit microcontrollers, it provides a focused platform for real-time control, data acquisition, human-interface equipment, and low-power embedded products where 32 KB Flash is sufficient and deterministic peripheral operation is valuable.
The principal features of the ATXMEGA32A4 include a 32 MHz maximum clock, 32 KB Flash organized as 16K x 16, 4 KB SRAM, 1 KB EEPROM, and 34 I/O ports. Peripherals include a four-channel DMA controller, an eight-channel event system, and an external bus interface. The 44-VQFN package provides a compact surface-mount solution for space-constrained PCB layouts, although its fine pitch requires careful assembly and land-pattern design.
At the architectural level, the AVR enhanced RISC core executes instructions in a single clock cycle and can approach 1 MIPS per MHz. The DMA controller can transfer data without occupying the CPU for each peripheral transaction, while the event system routes peripheral signals between timer, comparator, and communication resources. This combination supports responsive control loops and coordinated sampling in industrial, communication, and consumer equipment.
Typical uses include industrial monitoring, building-control interfaces, sensor hubs, programmable logic controllers, data loggers, and compact communication equipment. The combination of 34 I/O ports, four DMA channels, and an event system is particularly useful when multiple timers, counters, or serial peripherals must operate in a coordinated manner. A system requiring more Flash, SRAM, or peripherals may require a larger ATxmega model rather than this 32 KB A4 device.
Designers should verify the exact pin functions, alternate-function mappings, clock requirements, and power behavior against the manufacturer datasheet before layout release. The 44-VQFN footprint requires a conservative solder mask and paste pattern, and unused pins must be connected according to the device guidance. Supply-voltage requirements should also be checked against the specific clock, peripheral, and operating-temperature conditions used by the product.
This page consolidates verified distributor inventory, manufacturer feature information, package details, commercial pricing, application guidance, and design considerations. It also distinguishes genuine same-footprint alternatives from related devices that use different packages or materially different memory configurations, helping engineers avoid a replacement that cannot be soldered onto the existing PCB.
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