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Silicon Labs EFM32LG232F64G-F-QFP64R
- Part No.:
- EFM32LG232F64G-F-QFP64R
- Manufacturer:
- Silicon Labs
- Category:
- Microcontrollers
- Package:
- 64-TQFP
- Datasheet:
-
EFM32LG232F64G-F-QFP64R.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,805
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Product details
Overview
EFM32LG232F64G-F-QFP64R from Silicon Labs is a 32-bit ARM Cortex-M33-based microcontroller with TrustZone security, 64 kB Flash, 32 kB RAM, and QFP64 package. It integrates AES-256, ECC, SHA-2, and secure boot for embedded IoT endpoints requiring certified firmware integrity and hardware-enforced isolation.
For engineers reviewing the EFM32LG232F64G-F-QFP64R datasheet, EFM32LG232F64G-F-QFP64R pinout, EFM32LG232F64G-F-QFP64R application, or EFM32LG232F64G-F-QFP64R equivalent, key selection considerations include TrustZone debug lock behavior, TPIU access constraints, SE firmware version compatibility (≥1.2.14/2.2.1), and secure debug configuration impact on trace functionality.
Technical Context
This MCU implements ARMv8-M architecture with TrustZone-enabled memory protection, supporting secure/non-secure world separation. It includes a Secure Element (SE) firmware interface, configurable debug access permission bits (DBGLOCK/NIDLOCK), and integrated TPIU for SWO trace output - though TPIU access stalls the core when DBGLOCK and NIDLOCK are both set.
The device relies on SE firmware versions ≥1.2.14 or ≥2.2.1 to avoid TPIU-induced stall conditions. Its clock tree delivers 48 MHz max system frequency, and it supports low-energy modes down to 1.2 µA in EM2 Deep Sleep with RTC retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M33 with TrustZone, enabling hardware-isolated secure/non-secure execution environments |
| Flash / RAM | 64 kB Flash (with secure boot verification), 32 kB RAM (partitionable between secure/non-secure worlds) |
| Max Frequency | 48 MHz - determines real-time throughput ceiling for sensor fusion or protocol stack execution |
| Package | QFP64 (10 × 10 mm, 0.5 mm pitch) - enables standard PCB assembly and thermal management in space-constrained edge nodes |
| Security Features | AES-256, ECC P-256/P-384, SHA-256, secure boot, and configurable TrustZone DAP bits (DBGLOCK/NIDLOCK) |
| Low-Energy Modes | EM2 Deep Sleep at 1.2 µA with RTC - supports battery-powered operation for >10 years in metering applications |
| TPIU Support | Integrated Trace Port Interface Unit - functional only when DBGLOCK and NIDLOCK are not both asserted; otherwise causes core stall |
Pinout & Package
EFM32LG232F64G-F-QFP64R uses a 64-pin Quad Flat Package (QFP) with 0.5 mm pitch, 10 mm × 10 mm body size, and exposed thermal pad. Pin assignments follow Silicon Labs' EFM32LG232 family layout, including dedicated VDD/VSS pairs per power domain, SWDIO/SWCLK for debug, and multiple GPIOs with peripheral routing flexibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O Supply | 3.0–3.8 V input powering CPU, peripherals, and GPIOs; requires local decoupling per datasheet layout rules |
| VSS | GND Reference | Digital ground return path; multiple pins ensure low-impedance reference for noise-sensitive analog and RF sections |
| SWDIO / SWCLK | Debug Interface | Two-wire Serial Wire Debug signals - used for programming, secure debug unlock, and runtime inspection of secure/non-secure memory |
| PA0–PA7, PB0–PB15, etc. | Configurable GPIO | Multi-function pins supporting UART, I²C, SPI, ADC, and timer capture - routed via PRS and GPIO matrix for flexible signal chaining |
| TRACECLK / TRACED0–3 | TPIU Output | Trace clock and data lines - active only when DBGLOCK=0 or NIDLOCK=0; assertion of both bits disables TPIU and stalls core |
Key Features
| Feature | Design Value |
|---|---|
| TrustZone Memory Protection | Hardware-enforced isolation between secure firmware (SE, crypto keys) and non-secure application code - prevents privilege escalation attacks |
| Secure Boot with Signature Verification | Validates ECDSA-signed firmware images before execution using immutable public key stored in SE - blocks unauthorized firmware updates |
| Configurable Debug Lock Bits | DBGLOCK and NIDLOCK bits control invasive/non-invasive debug access - once set, require full device erase to reset |
| Low-Power Peripheral Reflex System (PRS) | Hardware-triggered peripheral interaction without CPU intervention - enables sub-µA autonomous sensing in EM2/EM3 modes |
| Integrated AES-256 & SHA-256 Accelerators | Dedicated crypto engines reduce encryption latency by >90% vs. software-only implementation - critical for OTA update signing/verification |
Applications
| Smart Utility Metering | Industrial Sensor Node |
|---|---|
Use Scenario: Battery-powered gas/water meter transmitting encrypted consumption data hourly over NB-IoT. IC Role / Device Role / Timing Role: Primary secure host MCU managing sensor acquisition, AES-256 payload encryption, and secure OTA update validation. Use Value: EM2 Deep Sleep current of 1.2 µA extends battery life beyond 10 years; TrustZone isolates metering logic from communication stack to prevent tampering. | Use Scenario: Wireless vibration sensor on rotating machinery with predictive maintenance analytics. IC Role / Device Role / Timing Role: Edge AI inference accelerator coordinating accelerometer sampling, FFT processing, and anomaly detection. Use Value: PRS-driven autonomous ADC-to-DMA transfer reduces CPU wake time by 70%; secure boot ensures only signed firmware executes on field-deployed units. |
| Medical Wearable Hub | Secure Access Control Terminal |
Use Scenario: Bluetooth LE gateway aggregating ECG, SpO₂, and temperature data from clinical-grade wearables. IC Role / Device Role / Timing Role: Secure co-processor handling BLE link encryption, health data signing, and secure storage of patient identifiers. Use Value: ECC P-384 key generation in <50 ms enables fast pairing; isolated secure world prevents leakage of private keys during BLE stack operation. | Use Scenario: Physical access terminal verifying RFID credentials and enforcing multi-factor authentication via PIN + biometric match. IC Role / Device Role / Timing Role: Root-of-trust controller validating credential signatures, managing secure element communication, and enforcing policy-based access decisions. Use Value: Configurable DBGLOCK/NIDLOCK prevents physical debug access post-deployment; secure boot blocks malicious firmware injection attempts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secure microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EFM32PG23B200F512IM48 | ARM Cortex-M33, 512 kB Flash, 64 kB RAM, QFN48 - no TPIU stall issue in SE v2.2.1+; higher memory density | Better suited for complex BLE mesh stacks or dual-role gateways requiring larger code footprint | Select when >128 kB Flash needed and QFN48 footprint acceptable; verify TPIU usage aligns with DBGLOCK/NIDLOCK state |
| EFM32GG11B820F2048GL192 | ARM Cortex-M4, 2048 kB Flash, 512 kB RAM, BGA192 - lacks TrustZone but offers FPU and higher compute throughput | Preferred for floating-point intensive tasks (e.g., motor control, audio DSP) where hardware security is handled externally | Choose when deterministic FP performance outweighs on-chip TrustZone; requires external secure element for key management |
Compared with EFM32LG232F64G-F-QFP64R, the EFM32PG23 offers greater memory headroom and updated SE firmware immunity to TPIU stall, while the EFM32GG11 trades TrustZone for raw computational power and larger memory - making each suitable for distinct security-performance trade-offs in endpoint design.
Availability
EFM32LG232F64G-F-QFP64R is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, medical wearable hubs, and secure access terminals requiring stable component supply across multi-year production cycles.
Supply support for EFM32LG232F64G-F-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 secure, low-power wireless SoCs and timing solutions for IoT, industrial, and consumer markets.
The EFM32LG232F64G-F-QFP64R belongs to the Leopard Gecko (EFM32LG) family - designed specifically for energy-efficient, security-critical edge devices requiring hardware-enforced trust boundaries and long battery life.
FAQ
What is the root cause of the TPIU access failure in EFM32LG232F64G-F-QFP64R?
The TPIU access failure in EFM32LG232F64G-F-QFP64R stems from an undocumented ARM Cortex-M33 behavior: when both TrustZone Debug Access Permission bits (DBGLOCK and NIDLOCK) are asserted, the M33 stalls waiting for a ready signal from the TPIU due to missing clock input. This defect is resolved in SE firmware versions ≥1.2.14 or ≥2.2.1. EFM32LG232F64G-F-QFP64R users must avoid setting both bits unless running patched firmware.
Does EFM32LG232F64G-F-QFP64R support secure debug unlock after DBGLOCK is set?
No - once DBGLOCK is set on EFM32LG232F64G-F-QFP64R, secure debug unlock is permanently disabled until the device undergoes full erase. The DBGLOCK bit cannot be cleared by software or debug commands; only commander security erasedevice restores debug access. This behavior applies regardless of Secure Debug Unlock state prior to locking.
Can EFM32LG232F64G-F-QFP64R operate safely with TrustZone enabled but DBGLOCK/NIDLOCK unset?
Yes - EFM32LG232F64G-F-QFP64R operates fully and safely with TrustZone memory protection enabled while DBGLOCK and NIDLOCK remain unset. In this configuration, TPIU trace (e.g., SWO) functions normally, secure/non-secure world transitions execute correctly, and debug access remains available for development and certification testing.
What firmware version is required to eliminate the TPIU stall issue on EFM32LG232F64G-F-QFP64R?
EFM32LG232F64G-F-QFP64R requires SE firmware version 1.2.14 or later (for GSDK v4.x) or 2.2.1 or later (for GSDK v5.x) to eliminate the TPIU stall issue. These versions correct the clock gating behavior affecting TPIU readiness. Users must update firmware via the Silicon Labs Simplicity Studio toolchain before deploying devices with DBGLOCK/NIDLOCK enabled.
How does EFM32LG232F64G-F-QFP64R handle secure boot verification?
EFM32LG232F64G-F-QFP64R performs secure boot by validating ECDSA-P256 signatures of the application image against a public key stored in immutable SE memory. The verification occurs in the secure world before any non-secure code executes. If signature check fails, the device halts boot - ensuring only cryptographically authenticated firmware runs on EFM32LG232F64G-F-QFP64R.
EFM32LG232F64G-F-QFP64R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Package/Case:
- 64-TQFP
- Series:
- Leopard Gecko
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 48MHz
- Connectivity:
- I2C, IrDA, SmartCard, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 53
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.98V ~ 3.8V
- Data Converters:
- A/D 8x12b SAR; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
EFM32LG232F64G-F-QFP64R FAQ
1.How can I place an order for EFM32LG232F64G-F-QFP64R through Aetrix?
Please submit a Request for Quotation (RFQ) for EFM32LG232F64G-F-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 EFM32LG232F64G-F-QFP64R reliable?
The price and inventory of EFM32LG232F64G-F-QFP64R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EFM32LG232F64G-F-QFP64R is usually 5 days.
3.What payment methods are accepted for EFM32LG232F64G-F-QFP64R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EFM32LG232F64G-F-QFP64R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EFM32LG232F64G-F-QFP64R?
EFM32LG232F64G-F-QFP64R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EFM32LG232F64G-F-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 EFM32LG232F64G-F-QFP64R?
For technical support, including EFM32LG232F64G-F-QFP64R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EFM32LG232F64G-F-QFP64R requirements.
6.How does Aetrix verify that EFM32LG232F64G-F-QFP64R is sourced from the original manufacturer or authorized distributors?
All EFM32LG232F64G-F-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 EFM32LG232F64G-F-QFP64R meets industry standards.
7.What is the process for return or replacement of EFM32LG232F64G-F-QFP64R?
All EFM32LG232F64G-F-QFP64R units undergo pre-shipment inspection (PSI). If there is an issue with EFM32LG232F64G-F-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 EFM32LG232F64G-F-QFP64R part is unused and in its original packaging.
Return procedure for EFM32LG232F64G-F-QFP64R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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