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Microchip Technology ATWILC1000-MR1100A
- Part No.:
- ATWILC1000-MR1100A
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- Module
- Datasheet:
-
ATWILC1000-MR1100A.pdf
- Description:
- IC RF TXRX+MCU WIFI MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:3,464
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Product details
Overview
ATWILC1000-MR1100A from Microchip Technology (formerly Atmel) is a certified 802.11b/g/n Wi-Fi SoC module integrating PA, LNA, T/R switch, and power management in a 14.48 × 13.46 × 3.35 mm package. It delivers IEEE 802.11n MCS7 receive sensitivity of −71.5 dBm (10% PER), supports SPI/SDIO/UART/I²C host interfaces, and operates across −40°C to +85°C for battery-powered IoT edge nodes.
For engineers reviewing the ATWILC1000-MR1100A datasheet, ATWILC1000-MR1100A pinout, ATWILC1000-MR1100A application, or ATWILC1000-MR1100A equivalent, key selection criteria include its dual-mode host interface (SPI/SDIO configurable via SDIO_SPI_CFG pin), ultra-low 1 µA deep power-down current, integrated WAPI/WPA2 security, and hardware-accelerated A-MSDU/A-MPDU aggregation for embedded wireless sensor networks.
Technical Context
The ATWILC1000-MR1100A implements a Cortus APS3 32-bit RISC processor managing MAC-layer functions including association, authentication, and security key handling, while offloading PHY-layer signal processing-including FFT, Viterbi decoding, channel estimation, and automatic gain control-to dedicated hardware engines. Its WLAN subsystem supports both STA and AP modes with WMM-PS and U-APSD power save mechanisms.
Radio operation is confined to the 2.412–2.4835 GHz ISM band with single-stream (1×1) 20 MHz channel support. Transmit output power is specified at 19 dBm (802.11b/11 Mbps), 14.5 dBm (802.11g/54 Mbps), and 13 dBm (802.11n/65 Mbps), all measured under IEEE-compliant EVM and spectral mask conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Wi-Fi Standard | IEEE 802.11b/g/n compliant; supports 11 channels (NA), 13 (EU), 14 (JP) in 2.4 GHz ISM band |
| Host Interface | SPI (up to 48 MHz) or SDIO (up to 50 MHz); selected by SDIO_SPI_CFG pin level |
| Receive Sensitivity | −71.5 dBm @ MCS7 (10% PER, 20 MHz); enables reliable link budget in low-SNR industrial environments |
| Transmit Power | 19 dBm @ 802.11b/11 Mbps; sufficient for 30+ meter line-of-sight range in typical indoor deployments |
| Power Save Modes | 1 µA deep power-down (VDDIO = 3.3 V); 280 µA doze mode with beacon monitoring and fast wake-up via IRQN or WAKE pin |
| Operating Temperature | −40°C to +85°C; guaranteed RF performance from −30°C to +85°C with 1 dB derating at −40°C |
| Security Support | WEP 64/128, WPA-TKIP, WPA2-CCMP (AES-128), WAPI; meets regulatory requirements for global IoT deployments |
Pinout & Package
ATWILC1000-MR1100A uses a surface-mount module package measuring 14.48 × 13.46 × 3.35 mm (L × W × H), with 31-pin land pattern per Figure 3-2 in Atmel-42432A-WILC1000-MR1100PA-SmartConnect-Datasheet_032015. Pin assignment follows Table 3-1, with 10 NC pins and 3 GND pins distributed for noise suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDIO_SPI_CFG | Interface Mode Select | High = SPI mode; Low = SDIO mode; determines physical layer mapping for SD_DAT0–SD_CLK / SPI_TXD–SPI_SCK |
| IRQN | Interrupt Output | Active-low open-drain interrupt signaling host on event completion (e.g., packet RX, state change) |
| WAKE | Host Wake Input | Allows host GPIO to exit module from Doze mode without full reset; enables responsive low-power polling |
| CHIP_EN | Module Enable | High = active; Low = power-down; requires host pull-down at power-up to prevent spurious enable |
| RESET_N | Hard Reset Input | Active-low asynchronous reset; must be held low during power ramp and released after VBAT/VDDIO stabilization |
Key Features
| Feature | Design Value |
|---|---|
| Hardware-Accelerated Frame Aggregation | Two-level A-MSDU/A-MPDU + block ACK reduces host CPU load and airtime by up to 40% vs. legacy 802.11g |
| On-Chip Memory Management Engine | Offloads DMA setup, buffer allocation, and descriptor management from host MCU-critical for resource-constrained Cortex-M0+ designs |
| 2-/3-Wire Bluetooth Coexistence | Dedicated interface coordinates Wi-Fi/Bluetooth channel arbitration without external logic or firmware intervention |
| Programmable Pull-Up Resistors | Configurable on GPIO_6, I2C_SCL, I2C_SDA, SD_DAT3–SD_CLK, and GPIO_1/3–5-enables clean I/O state control during sleep |
| eFuse-Based Calibration Storage | 768-bit OTP memory stores factory-calibrated TX power, crystal offset, and MAC address-eliminates external EEPROM dependency |
Applications
| Smart Home Sensor Node | Industrial Wireless Gateway |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data every 5 minutes to cloud via home router. IC Role / Device Role / Timing Role: Standalone Wi-Fi client (STA mode) with deep power-down between transmissions; uses 1 µA sleep current to extend 2xAA battery life beyond 5 years. Use Value: Eliminates need for external PMIC or RTC; integrated beacon monitoring in Doze mode ensures timely AP reconnection without host intervention. | Use Scenario: DIN-rail mounted gateway aggregating Modbus RTU data from 16 PLCs and forwarding via TLS-secured Wi-Fi to SCADA server. IC Role / Device Role / Timing Role: Dual-role device: Wi-Fi client (to upstream AP) + Soft-AP (for local commissioning); leverages hardware A-MPDU to sustain 4.2 Mbps aggregate throughput under 20% duty cycle. Use Value: Reduces host MCU Ethernet/Wi-Fi protocol stack overhead by >65%; on-chip cipher engine handles AES-128 encryption without impacting real-time Modbus response. |
| Medical Wearable Monitor | Asset Tracking Beacon |
Use Scenario: Chest-worn ECG patch streaming 250 Hz waveform snippets to smartphone app over Wi-Fi Direct® during clinical sessions. IC Role / Device Role / Timing Role: Wi-Fi Direct initiator/responder; uses advanced carrier synchronization and equalization to maintain link stability amid body-motion-induced Doppler shift. Use Value: Achieves −89 dBm sensitivity at 9 Mbps (802.11g), enabling robust connection at 3 m through clothing-no antenna tuning required. | Use Scenario: GPS-enabled pallet tracker reporting location every 6 hours via low-duty-cycle Wi-Fi scan-and-connect to nearest access point in warehouse. IC Role / Device Role / Timing Role: Fast-scan STA with programmable channel hopping; uses on-chip low-power sleep oscillator to maintain timing accuracy during 6-hour sleep intervals. Use Value: Enables sub-100 ms AP discovery and association using hardware-assisted channel scanning-reducing active RF time by 70% vs. software-based scan. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Wi-Fi SoC module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESP32-WROOM-32 | Integrated dual-core Xtensa LX6 MCU + 4 MB flash; supports 2.4 GHz Wi-Fi + Bluetooth 4.2; higher peak current (240 mA TX) and larger footprint (18 × 25.5 mm) | Requires full-stack firmware development; better suited for OTA-upgradable smart devices than ultra-low-power sensors | Select when onboard MCU compute, BLE coexistence, or field-upgradable application code are mandatory |
| INFINEON CYW4343W | Same 802.11b/g/n 1×1 PHY; supports SDIO only (no SPI); higher receive sensitivity (−73 dBm @ MCS7); requires external PA/LNA for full power compliance | Needs discrete RF front-end design; preferred for automotive-grade thermal reliability (−40°C to +105°C) | Select when SDIO-only interface is acceptable and extended temperature range or marginally better sensitivity justifies added BOM complexity |
Compared with ESP32-WROOM-32 and CYW4343W, the ATWILC1000-MR1100A provides certified module simplicity, lowest deep-sleep current, and integrated RF front-end-making it optimal for cost-sensitive, battery-operated IoT endpoints where host MCU handles application logic and Wi-Fi is strictly a connectivity peripheral.
Availability
ATWILC1000-MR1100A is available at Aetrix Electronics and suitable for smart home sensor nodes, industrial wireless gateways, medical wearables, and asset tracking beacons requiring stable component supply and regulatory-certified Wi-Fi integration.
Supply support for ATWILC1000-MR1100A 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
Microchip Technology acquired Atmel in 2016 and maintains full support for the SmartConnect family of Wi-Fi modules, emphasizing security, low power, and certification-ready designs for industrial and consumer IoT.
The ATWILC1000 product line delivers pre-certified, fully integrated 802.11b/g/n modules targeting battery-powered edge devices where minimal host resource usage, rapid time-to-connect, and long-term regulatory compliance are critical design constraints.
FAQ
What host interface options does the ATWILC1000-MR1100A support, and how is the selection made?
The ATWILC1000-MR1100A supports SPI (up to 48 MHz) and SDIO (up to 50 MHz) host interfaces, selected by the logic level on the SDIO_SPI_CFG pin: tied to VDDIO enables SPI mode, while grounded enables SDIO mode. UART and I²C are also available but designated for debug and test use only-not recommended for production data paths. This dual-interface flexibility allows designers to match the ATWILC1000-MR1100A to existing MCU peripherals without requiring interface translation logic.
Does the ATWILC1000-MR1100A require an external crystal, and what is its frequency?
Yes, the ATWILC1000-MR1100A requires a 26 MHz fundamental-mode crystal connected to the XIN/XOUT pins (not explicitly listed in Table 3-1 but confirmed in Figure 2-1 Block Diagram and Section 5.1). The crystal must meet ±20 ppm frequency tolerance and 12 pF load capacitance specifications to ensure compliant 802.11 timing and channel centering. No internal oscillator is provided-the 26 MHz reference drives both the RF synthesizer and digital subsystem clocks.
How does the ATWILC1000-MR1100A achieve its ultra-low 1 µA deep power-down current?
The ATWILC1000-MR1100A achieves 1 µA deep power-down current by completely disabling its RF transceiver, digital core, and memory subsystems while retaining only essential bias circuitry and the CHIP_EN input detection path. This state is entered via host command or automatic timeout, and exit occurs within microseconds upon CHIP_EN assertion or WAKE pin transition. The specification is validated at 3.3 V VDDIO and accounts for leakage across all internal FETs and regulators-making it suitable for multi-year battery operation in intermittent-sensing applications.
Is the ATWILC1000-MR1100A pre-certified for regulatory compliance, and which certifications apply?
Yes, the ATWILC1000-MR1100A is a pre-certified module with FCC ID QIS-ATWILC1000MR1100A, IC ID 4214A-ATWILC1000MR1100A, CE-RED (EN 300 328, EN 301 893), and TELEC certification. These cover conducted/radiated emissions, RF exposure, and protocol conformance for 802.11b/g/n operation in the 2.4 GHz ISM band. As a certified module, system-level RF testing is waived when used per the manufacturer's layout guidelines and antenna recommendations-reducing time-to-market for end products.
Can the ATWILC1000-MR1100A operate in both station (STA) and access point (AP) modes simultaneously?
No, the ATWILC1000-MR1100A supports either STA mode or AP mode-but not concurrently-in infrastructure basic service set (BSS) operation. It can function as a Wi-Fi Direct® device (peer-to-peer) or as a Soft-AP for local provisioning, but simultaneous dual-role operation (e.g., connecting to upstream AP while hosting local clients) is not supported. Mode selection is configured at initialization via host driver commands and requires full reinitialization to switch.
ATWILC1000-MR1100A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- Module
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- WiFi
- Protocol:
- 802.11b/g/n
- Modulation:
- 16QAM, 64QAM, BPSK, CCK, DBPSK, DQPSK, DSSS, OFDM, QPSK
- Frequency:
- 2.4GHz
- Data Rate (Max):
- 72.2Mbps
- Power - Output:
- 19dBm
- Sensitivity:
- -98dBm
- Memory Size:
- 128kB ROM, 224kB RAM
- Serial Interfaces:
- I2C, SDIO, SPI, UART
- GPIO:
- 6
- Voltage - Supply:
- 1.8V ~ 3.6V
- Current - Receiving:
- 68mA
- Current - Transmitting:
- 230mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- -
ATWILC1000-MR1100A FAQ
1.How can I place an order for ATWILC1000-MR1100A through Aetrix?
Please submit a Request for Quotation (RFQ) for ATWILC1000-MR1100A 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 ATWILC1000-MR1100A reliable?
The price and inventory of ATWILC1000-MR1100A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATWILC1000-MR1100A is usually 5 days.
3.What payment methods are accepted for ATWILC1000-MR1100A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATWILC1000-MR1100A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATWILC1000-MR1100A?
ATWILC1000-MR1100A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATWILC1000-MR1100A 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 ATWILC1000-MR1100A?
For technical support, including ATWILC1000-MR1100A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATWILC1000-MR1100A requirements.
6.How does Aetrix verify that ATWILC1000-MR1100A is sourced from the original manufacturer or authorized distributors?
All ATWILC1000-MR1100A 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 ATWILC1000-MR1100A meets industry standards.
7.What is the process for return or replacement of ATWILC1000-MR1100A?
All ATWILC1000-MR1100A units undergo pre-shipment inspection (PSI). If there is an issue with ATWILC1000-MR1100A, 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 ATWILC1000-MR1100A part is unused and in its original packaging.
Return procedure for ATWILC1000-MR1100A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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