原标题：Lattice iCE40超低功耗FPGA移动开发平台

　　lattice公司的iCE40 Ultra系列是超低功耗FPGA和传感器管理器,包括有SPI和I2C区块,以便和所有的移动传感器和应用处理器接口.此外还集成了两个振荡器10kHz和48MHz.器件具有1100到3520 LUT,采用先进的40nm超低功耗工艺,待机功耗低至71uA,主要用在可穿戴设备和,智能手机,平板电脑,手持设备等.本文介绍了iCE40 Ultra FPGA主要特性,iCE40 Ultra™移动开发平台主要特性,框图电路图,材料清单.

　　iCE40 Ultra family is an ultra-low power FPGA and sensor manager designed for ultra-low power mobile applications, such as smartphones, tablets and hand-held devices. The iCE40 Ultra family includes integrated SPI and I2C blocks to interface with virtually all mobile sensors and application processors. The iCE40 Ultra family also features two on-chip oscillators, 10 kHz and 48 MHz. The LFOSC (10 kHz) is ideal for low power function in always-on appli-cations, while HFOSC (48 MHz) can be used for awaken activities. The iCE40 Ultra family also features DSP functional block to off-load Application Processor to pre-process informa-tion sent from the mobile sensors. The embedded RGB PWM IP, with the three 24 mA constant current RGB out-puts on the iCE40 Ultra provides all the necessary logic to directly drive the service LED, without the need of external MOSFET or buffer. The 500 mA constant current IR driver output provides a direct interface to external LED for application such as IrDA functions. Users simply implement the modulation logic that meets his needs, and connect the IR driver directly to the LED, without the need of external MOSFET or buffer. This high current driver can also be used as Barcode Emulation, sending barcode information to external Barcode Reader. The iCE40 Ultra family of devices are targeting for mobile applications to perform functions such as IrDA, Service LED, Barcode Emulation, GPIO Expander, SDIO Level Shift, and other custom functions. The iCE40 Ultra family features three device densities, from 1100 to 3520 Look Up Tables (LUTs) of logic with pro-grammable I/Os that can be used as either SPI/I2C interface ports or general purpose I/O’s. It also has up to 80 kbits of Block RAMs to work with user logic

　　iCE40超低功耗FPGA主要特性:

　　 Flexible Logic Architecture

　　• Three devices with 1100 to 3520 LUTs

　　• Offered in WLCS, BGA and QFN packages

　　 Ultra-low Power Devices

　　• Advanced 40 nm ultra-low power process

　　• As low as 71 μA standby current typical

　　 Embedded Memory

　　• Up to 80 kbitssysMEM™ Embedded Block RAM

　　 Two Hardened I2C Interfaces

　　 Two Hardened SPI Interfaces

　　 Two On-Chip Oscillators

　　• Low Frequency Oscillator – 10 kHz

　　• High Frequency Oscillator – 48 MHz

　　 24 mA Current Drive RGB LED Outputs

　　• Three drive outputs in each device

　　• User selectable sink current up to 24 mA

　　 500 mA Current Drive IR LED Output

　　• One IR drive output in each device

　　• User selectable sink current up to 500 mA

　　 On-chip DSP

　　• Signed and unsigned 8-bit or 16-bit functions

　　• Functions include Multiplier, Accumulator, and Multiply-Accumulate (MAC)Flexible On-Chip Clocking

　　• Eight low skew global signal resource, six can be directly driven from external pins

　　• One PLL with dynamic interface per device

　　 Flexible Device Configuration

　　• SRAM is configured through:

　　— Standard SPI Interface

　　— Internal Nonvolatile Configuration Memory (NVCM)

　　 Ultra-Small Form Factor

　　• As small as 2.078 mm x 2.078 mm

　　iCE40超低功耗FPGA应用:

　　• Smartphones

　　• Tablets and Consumer Handheld Devices

　　• Handheld Commercial and Industrial Devices

　　• Multi Sensor Management Applications

　　• Sensor Pre-processing and Sensor Fusion

　　• Always-On Sensor Applications

　　• USB 3.1 Type C Cable Detect / Power Delivery Applications

　　图1 iCE40超低功耗FPGAiCE5LP-4K器件框图

　　iCE40 Ultra™移动开发平台

　　The iCE40 Ultra Mobile Development Platform features an iCE40 Ultra FPGA with a number of sensors that are commonly used in mobile applications. The board allows for implementation and development of several always-on functions.

　　iCE40 Ultra™移动开发平台主要特性:

　　iCE40 Ultra FPGA (iCE5LP4KSWG36)

　　USB programming/interface

　　High-current LED output

　　Infrared transmit and Receive

　　RGB LED control

　　Numerous Sensors

　　Two I2S MICs

　　Proximity sensor

　　Temperature Sensors

　　Barometric Pressure sensor

　　Accelerometer

　　Gyroscope

　　Magnetometer

　　Humidity sensor

　　Hall Sensor

　　Fingerprint sensor

　　On-board oscillator

　　Kit Contents

　　iCE40 Ultra mobile development platform

　　USB connector cable for battery charging

　　This platform is designed to develop and demonstrate various mobile applications using the iCE40 Ultra device. The board is in the form factor of a bar phone featuring various sensors and connectivity to external mobile software development platforms.

　　iCE40 Ultra™移动开发平台包括:

　　• Main Board – The main board is mounted in lower plastic enclosures.

　　• Key Set – The key set includes keys A, B, C, and Custom. Key A is installed on the main unit by default.

　　• DragonBoard Interface Module

　　• Interconnecting Cables – The cables include USB mini-B cable, DragonBoard interface ribbon cable, and +5 V supply flywire.

　　图2.iCE40 Ultra™移动开发平台外形图(正面)

　　图3.iCE40 Ultra™移动开发平台外形图(背面)

　　iCE40 Ultra™移动开发平台材料清单: