Data Sheet

MW320
datasheet
4 /
21
1. General Description
The MW320is a
high performance
, low-
power WLAN
WiFi Module with
highly integrated
System-on-Chip (SoC) solution designed for a broad array of smart devices for Internet of Things (IoT), wearables,
accessories, Machine-to-Machine (M2M), home automation, and Smart Energy applications.
A high degree of integration enables very low system costs requiring only a single 3.3V power input, a 38.4 MHz crystal,
and SPI Flash. It has been Integrated with on board sheet metal stamping antenna and another U.FL connector
optional for external antenna.
The SoC includes a full-featured W LAN subsystem powered by proven and mature IEEE 802.11n/g/b Marvell
technology. The WLAN subsystem integrates a WLAN MAC, baseband, and direct-conversion RF radio with integrated
PA, LNA, and transmit/receive switch. It also integrates a CPU subsystem with integrated memory to run Marvell WLAN
firmware to handle real time WLAN protocol processing to off-load many WLAN functions from the main application
CPU.
The 88MW300/ 88MW320 application subsystem is powered by an ARM Cortex-M4F CPU that operates up to 200
MHz. The device supports an integrated 512 KB SRAM, 128 KB mask ROM, and a QSPI interface to external Flash. An
integrated Flash Controller with a 32 KB SRAM cache enables execute In Place (XIP) support for firmware from Flash.
The SoC is designed for low-power operation and includes several low-power states and fast wake-up times. Multiple
power domains and clocks can be individually shut down to save power. The SoC also has a high-efficiency internal PA
that can be operated in low-power mode to save power. The microcontroller and WLAN subsystems can be placed into
low-power states, independently, supporting a variety of application use cases. An internal DC-DC regulator provides
the 1.8V rail for the WLAN subsystem.
The SoC provides a full array of peripheral interfaces including SSP/SPI/I2S (3x), UART (3x), I2C (2x), General Purpose
Timers and PWM, ADC, DAC, Analog Comparator, and GPIOs. It also includes a hardware cryptographic engine, RTC,
and Watchdog Timer. The 88MW302/ 88MW322 includes a high speed USB On-The-Go (OTG) interface to enable USB
audio, video, and other applications but 88MW300/ 88MW320 doesn’t have this USB OTG.
A complete set of digital and analog interfaces enable direct interfacing for I/O avoiding the need for external chips.
The application CPU can be used to support custom application development avoiding the need for another
microcontroller or processor.
Section 1-1 shows an overall block diagram of the device.