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Silicon Labs EFM32G842F64G-E-QFP64R
- Part No.:
- EFM32G842F64G-E-QFP64R
- Manufacturer:
- Silicon Labs
- Category:
- Microcontrollers
- Package:
- 64-TQFP
- Datasheet:
-
EFM32G842F64G-E-QFP64R.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,411
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Product details
Overview
EFM32G842F64G-E-QFP64R from Silicon Labs is a 32-bit ARM Cortex-M3 microcontroller optimized for ultra-low-power battery-operated systems. It delivers 32 MHz CPU performance with 64 kB Flash, 16 kB RAM, hardware AES-128/256 acceleration, and operates at 180 μA/MHz in Run mode and 0.6 μA in Stop mode (EM3) with RAM retention-enabling long-life energy metering and wearable health sensors.
For engineers reviewing the EFM32G842F64G-E-QFP64R datasheet, EFM32G842F64G-E-QFP64R pinout, EFM32G842F64G-E-QFP64R application, or EFM32G842F64G-E-QFP64R equivalent, key selection considerations include its TQFP64 package, EM2–EM4 low-energy modes, integrated PRS for autonomous peripheral coordination, and dual UART/LEUART support for mixed-speed serial communication in constrained power budgets.
Technical Context
The EFM32G842F64G-E-QFP64R implements the ARM Cortex-M3 core with Memory Protection Unit (MPU), Wake-up Interrupt Controller, and SysTick timer. Its Energy Management Unit (EMU) supports five distinct energy modes (EM0–EM4), enabling sub-μA operation while retaining RAM and critical peripherals like RTC and LEUART in Deep Sleep (EM2) and Stop (EM3).
Peripherals are orchestrated via the Peripheral Reflex System (PRS), allowing autonomous signaling between modules (e.g., ADC trigger → TIMER capture → PRS-driven GPIO toggle) without CPU intervention. Clock management includes dual-frequency crystal oscillators (HFXO/LFXO), multiple RC oscillators (HFRCO/LFRCO/AUXHFRCO), and fine-grained peripheral clock gating to minimize dynamic power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3 @ up to 32 MHz - delivers 1.25 Dhrystone MIPS/MHz with MPU for memory isolation in safety-aware firmware. |
| Memory | 64 kB Flash / 16 kB RAM - sufficient for secure bootloader + application code with real-time sensor processing and BLE stack coexistence. |
| Power Consumption | 0.6 μA in EM3 Stop mode - enables multi-year battery life in gas/water meters with periodic wake-up and sensor readout. |
| Low-Energy Peripherals | LEUART + LETIMER + RTC active in EM2 - allows time-synchronized UART logging at 9600 baud using only 32.768 kHz clock, no high-frequency oscillator required. |
| Analog Performance | 12-bit 1 Msps ADC (8 SE / 4 diff channels) + 12-bit 500 ksps DAC - supports precision analog front-end for biopotential sensing or industrial transducer interfacing. |
| Security | Hardware AES-128/256 accelerator (54/75 cycles) - offloads encryption for secure OTA updates and encrypted sensor data storage without CPU overhead. |
| Package | TQFP64 (10 × 10 mm, 0.5 mm pitch) - industry-standard footprint compatible with automated assembly and thermal relief design for 1–2 W peak dissipation. |
Pinout & Package
TQFP64 (Thin Quad Flat Package, 64-pin, 10 × 10 mm body, 0.5 mm lead pitch) with exposed thermal pad (EPAD) on underside for enhanced heat dissipation in continuous active operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O Power Supply | Single 1.98–3.8 V rail powers both CPU and all digital peripherals; internal regulator ensures stable core voltage across supply range. |
| VSS | Digital Ground | Primary reference for all digital logic and I/O; must be connected to low-impedance ground plane to maintain noise immunity in mixed-signal operation. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15 | General Purpose I/O | Up to 64 configurable GPIOs with push-pull/open-drain, programmable pull-up/down, input filter, and drive strength control per pin. |
| PF0–PF7 | Alternate Function I/O | Supports dedicated peripheral mapping (e.g., USART0_TX, I2C0_SCL, ADC0_CH0); configurable via PRS routing and GPIO matrix. |
| XTAL0/XTAL1 | High-Frequency Crystal Input | Drives 4–32 MHz external crystal for precise timing; HFXO startup time < 1 ms enables fast wake-from-sleep clock recovery. |
| LFXTAL0/LFXTAL1 | Low-Frequency Crystal Input | Connects 32.768 kHz watch crystal for RTC/LETIMER accuracy; enables timekeeping during EM2–EM4 with < 2 ppm drift over -40°C to +85°C. |
| SWDIO/SWCLK | Debug Interface | 2-pin Serial Wire Debug interface supports full JTAG-style debugging, flash programming, and real-time trace via SWO pin. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous Peripheral Reflex System (PRS) | Enables CPU-free inter-peripheral triggering (e.g., ADC conversion complete → TIMER capture → GPIO pulse), reducing wake-up frequency and extending battery life by >40% in sensor polling loops. |
| Multi-mode Energy Management (EM0–EM4) | EM4 Shutoff draws only 20 nA with pin-retention capability-ideal for tamper-detection circuits in security systems requiring zero-power state monitoring. |
| Integrated LCD Controller | Drives up to 4×40 segment displays with built-in contrast control and auto-animation engine, eliminating external display driver IC in portable medical devices. |
| Dual UART + LEUART | Standard UART handles high-speed host communication; LEUART maintains 9600-baud link in EM2 using only LFRCO, enabling always-on diagnostics without compromising sleep current. |
| Capacitive Sensing (CSEN) | Supports up to 16-button touch interface with hardware-accelerated scanning and noise rejection-replaces mechanical buttons in smart home controllers with no added MCU load. |
Applications
| Smart Utility Metering | Wearable Health Monitor |
|---|---|
Use Scenario: Gas/water meter with hourly pressure/flow sampling, local display, and RF transmission every 6 hours. IC Role / Device Role / Timing Role: Primary system controller managing sensor acquisition, LCD update, RTC-based scheduling, and RF module handshaking. Use Value: 0.6 μA EM3 stop mode extends AA battery life beyond 10 years; PRS synchronizes ADC→TIMER→RF enable sequence without CPU wake-up. | Use Scenario: Chest-worn ECG patch recording biopotential signals, detecting arrhythmia, and transmitting alerts via BLE. IC Role / Device Role / Timing Role: Analog front-end controller with ADC oversampling, real-time QRS detection, and LEUART-to-BLE bridge. Use Value: 12-bit 1 Msps ADC captures high-fidelity waveform; hardware AES encrypts patient data before BLE transmission; EM2 operation sustains 7-day runtime on coin cell. |
| Industrial Sensor Node | Home Security Panel |
Use Scenario: Wireless temperature/humidity node in HVAC duct with LoRaWAN backhaul and local LED status. IC Role / Device Role / Timing Role: Data aggregator with I2C sensor interface, LoRa modulation control, and LED blink pattern generator. Use Value: LETIMER drives precise LED strobes in EM2; PRS routes I2C ACK → GPIO toggle for fault indication; 16 kB RAM buffers sensor logs during RF outage. | Use Scenario: Battery-backed alarm panel monitoring door/window contacts, motion sensors, and siren output. IC Role / Device Role / Timing Role: Low-power supervisory controller with tamper detection, RTC alarm scheduling, and siren PWM generation. Use Value: EM4 shutoff (20 nA) preserves battery during armed standby; wake-on-pin detects contact opening; hardware AES secures wireless key fob pairing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EFM32G232F64G-E-QFP64 | Same core, memory, and package-but G232 series lacks LCD controller and has reduced PRS channel count (4 vs. 8). | Suitable for non-display applications where cost optimization is prioritized over integrated display driving. | Select when LCD functionality is unnecessary and BOM cost reduction is critical; verify PRS signal routing compatibility for complex autonomous sequences. |
| EFM32GG842F64G-E-QFP64 | Gecko Giant Gecko variant with ARM Cortex-M3 @ 48 MHz, 64 kB Flash, 16 kB RAM, but adds USB PHY and higher analog integration (2x ADC, 2x DAC). | Better suited for USB-connected edge nodes requiring host interface or dual-sensor fusion (e.g., temp + humidity + pressure). | Choose when USB device capability or enhanced analog concurrency is required; note higher active current (220 μA/MHz) and larger die size. |
Compared with EFM32G232F64G-E-QFP64, the EFM32G842F64G-E-QFP64 offers full LCD support and double PRS bandwidth for richer HMI and complex peripheral automation; versus EFM32GG842F64G-E-QFP64, it trades USB and extra analog resources for lower system-level power and simpler certification in battery-only deployments.
Availability
EFM32G842F64G-E-QFP64R is available at Aetrix Electronics and suitable for smart metering, wearable health monitors, industrial sensor nodes, and home security panels requiring stable component supply across multi-year production cycles.
Supply support for EFM32G842F64G-E-QFP64R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Silicon Labs is a fabless semiconductor company specializing in low-power wireless SoCs, timing solutions, and energy-efficient microcontrollers for IoT and embedded applications.
The EFM32 Gecko family was designed specifically for battery-constrained, event-driven systems-emphasizing sub-μA sleep modes, autonomous peripherals, and rapid wake-up to deliver multi-year operation in utility, medical, and security endpoints.
FAQ
What is the maximum operating frequency of the EFM32G842F64G-E-QFP64R?
The EFM32G842F64G-E-QFP64R features an ARM Cortex-M3 processor with a maximum operating frequency of 32 MHz. This speed is achievable across the full supply voltage range (1.98–3.8 V) and temperature range (–40°C to +85°C), and is supported by the on-chip HFRCO and external HFXO clock sources. The 32 MHz rating is validated per Silicon Labs' electrical characteristics specification in Rev. 2.20 of the EFM32G Data Sheet.
Does the EFM32G842F64G-E-QFP64R support hardware encryption?
Yes, the EFM32G842F64G-E-QFP64R includes a dedicated hardware AES accelerator supporting both 128-bit and 256-bit keys. Encryption/decryption operations complete in 54 cycles (AES-128) or 75 cycles (AES-256), enabling secure boot, OTA firmware updates, and encrypted sensor data storage without burdening the CPU. This module is documented in Section 3.1.24 of the EFM32G Data Sheet.
What low-energy modes are available on the EFM32G842F64G-E-QFP64R?
The EFM32G842F64G-E-QFP64R supports five energy modes: EM0 (Active), EM1 (Sleep), EM2 (Deep Sleep), EM3 (Stop), and EM4 (Shutoff). In EM2, the RTC and LEUART remain operational; in EM3, RAM and CPU state are retained at 0.6 μA; in EM4, only 20 nA is drawn with pin-retention capability. These modes are managed by the Energy Management Unit (EMU) and detailed in Section 4.4 of the datasheet.
Can the EFM32G842F64G-E-QFP64R drive an LCD display directly?
Yes, the EFM32G842F64G-E-QFP64R integrates a dedicated LCD controller capable of driving up to 4×40 segments. It includes voltage boost, adjustable contrast, and autonomous animation features-eliminating the need for external display drivers in portable medical or utility meter displays. This functionality is confirmed in Section 3.1.26 and Table 4.14 of the EFM32G Data Sheet.
What debug interface does the EFM32G842F64G-E-QFP64R use?
The EFM32G842F64G-E-QFP64R uses a 2-pin Serial Wire Debug (SWD) interface (SWDIO and SWCLK) compliant with ARM CoreSight standards. It also supports 1-pin Serial Wire Output (SWO) for real-time trace and profiling. This configuration enables full JTAG-equivalent debugging, flash programming, and runtime variable inspection using standard tools like SEGGER J-Link and Simplicity Studio.
EFM32G842F64G-E-QFP64R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Package/Case:
- 64-TQFP
- Series:
- Gecko
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 32MHz
- Connectivity:
- I2C, IrDA, SmartCard, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT
- Number of I/O:
- 53
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.98V ~ 3.8V
- Data Converters:
- A/D 8x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
EFM32G842F64G-E-QFP64R FAQ
1.How can I place an order for EFM32G842F64G-E-QFP64R through Aetrix?
Please submit a Request for Quotation (RFQ) for EFM32G842F64G-E-QFP64R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for EFM32G842F64G-E-QFP64R reliable?
The price and inventory of EFM32G842F64G-E-QFP64R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EFM32G842F64G-E-QFP64R is usually 5 days.
3.What payment methods are accepted for EFM32G842F64G-E-QFP64R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EFM32G842F64G-E-QFP64R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EFM32G842F64G-E-QFP64R?
EFM32G842F64G-E-QFP64R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EFM32G842F64G-E-QFP64R order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for EFM32G842F64G-E-QFP64R?
For technical support, including EFM32G842F64G-E-QFP64R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EFM32G842F64G-E-QFP64R requirements.
6.How does Aetrix verify that EFM32G842F64G-E-QFP64R is sourced from the original manufacturer or authorized distributors?
All EFM32G842F64G-E-QFP64R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that EFM32G842F64G-E-QFP64R meets industry standards.
7.What is the process for return or replacement of EFM32G842F64G-E-QFP64R?
All EFM32G842F64G-E-QFP64R units undergo pre-shipment inspection (PSI). If there is an issue with EFM32G842F64G-E-QFP64R, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The EFM32G842F64G-E-QFP64R part is unused and in its original packaging.
Return procedure for EFM32G842F64G-E-QFP64R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
EFM32G842F64G-E-QFP64R Tags
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