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Silicon Labs EFM32G842F32G-E-QFP64R
- Part No.:
- EFM32G842F32G-E-QFP64R
- Manufacturer:
- Silicon Labs
- Category:
- Microcontrollers
- Package:
- 64-TQFP
- Datasheet:
-
EFM32G842F32G-E-QFP64R.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,963
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Product details
Overview
EFM32G842F32G-E-QFP64R from Silicon Labs is a 32-bit ARM Cortex-M3 microcontroller optimized for ultra-low-power battery-operated systems, featuring 32 kB Flash, 8 kB RAM, 32 MHz max clock, 0.6 µA Stop mode current, and hardware AES-128 encryption. It integrates ADC (12-bit, 1 Msps), DAC (12-bit, 500 ksps), LEUART, PRS, and LCD controller - deployed in smart metering, health wearables, and industrial sensors.
For engineers reviewing the EFM32G842F32G-E-QFP64R datasheet, EFM32G842F32G-E-QFP64R pinout, EFM32G842F32G-E-QFP64R application, or EFM32G842F32G-E-QFP64R equivalent, key selection criteria include energy mode transitions (EM0–EM4), peripheral autonomy (PRS, LEUART, LETIMER), analog precision (ADC/DAC specs), and TQFP64 package compatibility with legacy EFM32G232 designs.
Technical Context
The EFM32G842F32G-E-QFP64R implements the ARM Cortex-M3 core with Memory Protection Unit and Wake-up Interrupt Controller, supporting deterministic real-time execution at up to 32 MHz. Its Energy Management Unit enables five distinct energy modes (EM0–EM4), with autonomous peripherals like LETIMER and LEUART remaining active in EM2 Deep Sleep using only a 32.768 kHz clock source.
Peripheral Reflex System (PRS) enables CPU-free inter-peripheral signaling - e.g., ADC conversion completion triggering DMA transfer or TIMER capture - while the 8-channel DMA controller offloads data movement from flash/SRAM/USART/EBI. Clock Management Unit provides per-module clock gating and supports multiple oscillators (HFXO, LFXO, HFRCO, LFRCO, ULFRCO).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM Cortex-M3 @ 32 MHz - delivers 1.25 DMIPS/MHz real-time performance with MPU for memory isolation |
| Memory | 32 kB Flash / 8 kB RAM - sufficient for secure bootloader + sensor fusion firmware with retained SRAM in Stop mode |
| Power Modes | 0.6 µA in EM3 Stop (3 V) with RAM/CPU retention - enables rapid wake-up (<2 µs) without state reload |
| Analog | 12-bit 1 Msps ADC (8 SE/4 diff) + 12-bit 500 ksps DAC (2 SE/1 diff) - supports closed-loop control and sensor signal conditioning |
| Low-Energy Peripherals | LEUART (9600 baud on 32.768 kHz), LETIMER, RTC (24-bit, EM2-active) - sustain timekeeping and serial comms during deep sleep |
| Security | Hardware AES-128 accelerator (54 cycles/128-bit) - accelerates encrypted OTA updates without CPU overhead |
| Package | TQFP64 (10 × 10 mm, 0.5 mm pitch) - industry-standard footprint compatible with automated optical inspection and reflow |
Pinout & Package
TQFP64 (Thin Quad Flat Package, 64-pin, 10 mm × 10 mm body, 0.5 mm lead pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | 1.98–3.8 V single rail; powers CPU, RAM, and all digital peripherals - decoupling required per datasheet layout guidelines |
| VSS | Digital ground | Reference for all digital logic and I/O; must be low-impedance connection to minimize noise coupling into analog sections |
| PA0–PA7, PB0–PB15, PC0–PC15, PD0–PD7 | GPIO banks | Configurable push-pull/open-drain with programmable pull-up/down/filter; up to 90 total pins across banks - supports peripheral routing flexibility |
| PF0–PF7 | Alternate function I/O | Supports dedicated functions including LEUART0, USART0/1, I2C0, ADC0, DAC0, ACMP0/1 - enables mixed-signal subsystem integration |
| XTAL0/XTAL1 | Low-frequency crystal input | Connects 32.768 kHz crystal for RTC/LETIMER timing - essential for sub-µA timekeeping in EM2/EM3 modes |
| SWDIO/SWCLK | Debug interface | 2-pin Serial Wire Debug - enables full JTAG-like debugging and programming without additional pins or protocol overhead |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous Peripheral Reflex System (PRS) | Enables hardware-triggered actions between peripherals (e.g., ADC done → DMA start) without CPU intervention - reduces active time and extends battery life |
| Low Energy UART (LEUART) | Full-duplex UART operation at 9600 baud using only 32.768 kHz clock - allows persistent wireless telemetry during EM2 Deep Sleep |
| Hardware AES-128 Accelerator | Encrypts/decrypts 128-bit blocks in 54 cycles - offloads crypto from Cortex-M3, enabling secure firmware updates with <10 µs latency |
| Flexible Energy Management (EM0–EM4) | EM4 Shutoff draws 20 nA with pin-retained state - ideal for tamper-detection circuits requiring zero-power wake-on-interrupt |
| Integrated LCD Controller | Drives up to 4×40 segments with voltage boost and auto-contrast - eliminates external display driver IC in portable HMI applications |
Applications
| Smart Metering | Health & Fitness Wearables |
|---|---|
Use Scenario: Gas/water/electricity meter with hourly pulse logging, tamper detection, and RF transmission. IC Role / Device Role / Timing Role: Main system controller managing metrology ADC sampling, RTC timestamping, LEUART-to-RF bridge, and EM4-based security monitoring. Use Value: 0.6 µA EM3 Stop mode preserves calendar time and security state for >10 years on coin cell; PRS synchronizes metrology capture with flash write. | Use Scenario: Optical heart-rate monitor with PPG sensing, motion compensation, and Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Sensor hub aggregating ADC (PPG), ACMP (motion), and LETIMER-driven LED pulsing - feeds processed data to BLE SoC via USART. Use Value: 12-bit ADC + hardware oversampling achieves SNR >70 dB for clean PPG waveforms; EM2-active LETIMER ensures precise LED timing without CPU wake-ups. |
| Industrial Sensor Nodes | Alarm & Security Systems |
Use Scenario: Wireless temperature/humidity node with LoRaWAN backhaul, operating unattended for 5+ years. IC Role / Device Role / Timing Role: Low-power host MCU acquiring sensor data via I2C, performing CRC validation, and scheduling LoRa transmit bursts using RTC alarms. Use Value: 45 µA/MHz EM1 Sleep mode + autonomous RTC wake-up minimizes average current to <5 µA - extends CR2032 lifetime beyond 60 months. | Use Scenario: Door/window contact sensor with magnetic reed switch, local siren, and cellular alert on breach. IC Role / Device Role / Timing Role: Always-on security controller monitoring GPIO interrupts, driving piezo siren via PWM, and initiating GSM call via UART after tamper confirmation. Use Value: 20 nA EM4 Shutoff retains pin state and enables instant wake-on-reed-switch closure; hardware AES secures configuration over-the-air. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EFM32G232F32G-E-QFP64 | Same TQFP64 package, identical core/peripherals, but lower Flash (32 kB) and RAM (8 kB); same energy specs and pinout | No functional difference - fully pin-compatible and software-compatible replacement | Select when cost optimization is prioritized and no additional Flash/RAM headroom is needed |
| EFM32GG11B120F1024GL120-B | ARM Cortex-M4, 48 MHz, 1024 kB Flash, 128 kB RAM, advanced crypto (ECC, SHA), QFN64 - not pin-compatible | Higher performance, richer security, larger memory - suited for complex edge AI inference or multi-protocol gateways | Choose only when migrating to next-gen Gecko Series with architectural upgrade; requires PCB redesign and firmware porting |
Compared with EFM32G232F32G-E-QFP64, the EFM32G842F32G-E-QFP64R offers identical functionality with tape-and-reel packaging for automated assembly; versus EFM32GG11B120F1024GL120-B, it trades raw compute and memory for proven ultra-low-power operation in constrained battery systems.
Availability
EFM32G842F32G-E-QFP64R is available at Aetrix Electronics and suitable for smart metering, wearable health monitors, and industrial sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for EFM32G842F32G-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 and mixed-signal ICs for IoT, infrastructure, and industrial markets.
The EFM32 Gecko family was designed specifically for energy-constrained applications - delivering industry-leading µA/MHz efficiency, autonomous peripherals, and integrated analog to minimize external components in battery-powered systems.
FAQ
What is the maximum operating frequency of the EFM32G842F32G-E-QFP64R?
The EFM32G842F32G-E-QFP64R operates at a maximum frequency of 32 MHz using its internal HFRCO or external HFXO. This speed is maintained across the full industrial temperature range (−40 °C to +85 °C) and supply voltage (1.98 V to 3.8 V), enabling deterministic real-time response for time-critical sensor processing tasks within the EFM32G842F32G-E-QFP64R.
Does the EFM32G842F32G-E-QFP64R support hardware encryption?
Yes, the EFM32G842F32G-E-QFP64R includes a dedicated hardware AES-128 accelerator that performs encryption and decryption in 54 clock cycles per 128-bit block. This module operates independently of the CPU, allowing secure firmware updates and encrypted communication without impacting real-time performance of the EFM32G842F32G-E-QFP64R application.
What are the lowest power consumption modes supported by the EFM32G842F32G-E-QFP64R?
The EFM32G842F32G-E-QFP64R supports EM4 Shutoff mode drawing 20 nA at 3 V with pin state retention, and EM3 Stop mode drawing 0.6 µA at 3 V with full RAM and CPU register retention. Both modes enable wake-up via external interrupt or RTC alarm - critical for maintaining long-term operation in battery-powered EFM32G842F32G-E-QFP64R deployments.
Can the EFM32G842F32G-E-QFP64R drive an LCD display directly?
Yes, the EFM32G842F32G-E-QFP64R integrates a segment LCD controller supporting up to 4 commons × 40 segments, with built-in voltage boost and contrast adjustment. This eliminates the need for external display drivers in portable devices - a verified capability documented in the EFM32G842F32G-E-QFP64R datasheet Section 4.14 and Reference Manual Chapter 32.
Is the EFM32G842F32G-E-QFP64R pin-compatible with other EFM32G TQFP64 variants?
Yes, the EFM32G842F32G-E-QFP64R shares identical pinout and electrical characteristics with all EFM32Gx32 and EFM32Gx22 TQFP64 variants (e.g., EFM32G232F32G-E-QFP64). This allows direct substitution in existing designs without PCB modification - confirmed by Silicon Labs' Pin Compatibility Matrix in AN0012 and the EFM32G Data Sheet Table 5.4.1.
EFM32G842F32G-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:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K 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:
EFM32G842F32G-E-QFP64R FAQ
1.How can I place an order for EFM32G842F32G-E-QFP64R through Aetrix?
Please submit a Request for Quotation (RFQ) for EFM32G842F32G-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 EFM32G842F32G-E-QFP64R reliable?
The price and inventory of EFM32G842F32G-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 EFM32G842F32G-E-QFP64R is usually 5 days.
3.What payment methods are accepted for EFM32G842F32G-E-QFP64R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EFM32G842F32G-E-QFP64R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EFM32G842F32G-E-QFP64R?
EFM32G842F32G-E-QFP64R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EFM32G842F32G-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 EFM32G842F32G-E-QFP64R?
For technical support, including EFM32G842F32G-E-QFP64R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EFM32G842F32G-E-QFP64R requirements.
6.How does Aetrix verify that EFM32G842F32G-E-QFP64R is sourced from the original manufacturer or authorized distributors?
All EFM32G842F32G-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 EFM32G842F32G-E-QFP64R meets industry standards.
7.What is the process for return or replacement of EFM32G842F32G-E-QFP64R?
All EFM32G842F32G-E-QFP64R units undergo pre-shipment inspection (PSI). If there is an issue with EFM32G842F32G-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 EFM32G842F32G-E-QFP64R part is unused and in its original packaging.
Return procedure for EFM32G842F32G-E-QFP64R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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