Lattice Semiconductor ICE40 Ultra Manual de usuario

December 2014

EB87_1.1

iCE40 Ultra™ Breakout Board

User Guide

iCE40 Ultra Breakout Board

Introduction

Thank you for choosing the Lattice iCE40 Ultra™ Breakout Board.

This guide describes how to begin using the iCE40 Ultra Breakout Board, an easy-to-use platform for demonstrat-

ing the high-current LED drive capabilities of the iCE40 Ultra FPGA. Along with the evaluation board and accesso-

ries, this kit includes the pre-loaded LED Driver Demo that demonstrates driving the RGB LEDs with a PWM circuit.

In addition, most of the device's I/O balls are accessible via one of the several header locations on the board, facil-

itating rapid prototyping of user functions.

The contents of this user’s guide include demo operation, top-level functional descriptions of the various portions of

the evaluation board, descriptions of the on-board connectors, shunts, a complete set of schematics and the bill of

materials for the iCE40 Ultra Breakout Board.

Note: Static electricity can severely shorten the lifespan of electronic components. Be careful when handling the

iCE40 Ultra Breakout Board as to not damage it from ESD.

Features

The iCE40 Ultra Breakout Board includes:

•iCE40 Ultra Breakout Board – The iCE40 Ultra Breakout Board features the following on-board components

and circuits:

— iCE40 Ultra (iCE5LP4K-SWG36) device in a 36-ball WLCSP package.

— Example of a board using this 0.35-pitch WLCSP package.

— High-current LED output

— Infrared transmit

— iCE40 Ultra Current Measurements

— Standard USB cable for device programming

— RoHS-compliant packaging and process

•Pre-loaded Demo – The kit includes a pre-loaded demo to control the onboard RGB LED in conjunction with a

software run GUI.

•USB Connector Cable – A mini B USB port provides power, a programming interface and communication for the

software RGB LED GUI to the iCE40 Ultra SPI port.

iCE40 Ultra Breakout Board

Figure 1 shows the top side of the iCE40 Ultra Breakout Board indicating the specific features that are designed on

the board.

Figure 1. iCE40 Ultra Breakout Board (Top Side)

iCE40 Ultra Device

The board features an iCE5LP4K FPGA with a 1.2 V core supply. The device is packaged in a 36-ball WLCSP. For

a complete description of this device, see DS1048, iCE40 Ultra Family Data Sheet.

Software Requirements

You should install the following software before you begin developing designs for the board:

• Lattice iCEcube2 2014.04 (or higher)

• Diamond Programmer 3.2 (or higher)

These software are available at the Lattice website Design Software & IP page. Make sure you log in to www.lattic-

esemi.com, otherwise these software downloads will not be visible. It is also recommended to download the RGB

LED software GUI which interfaces with the iCE40 Ultra Breakout Board. This GUI allows you to control the RGB

LED for color, brightness, blinking and breathing. Download the PC or MAC version of the GUI at www.lattice-

semi.com.

USB Interface

Socket

iCE5LP4K-SWG36

Torch

LED

IR LEDRGB

LED

–

Power LED

iCE40 Ultra Breakout Board

Demonstration Design Shunts

Lattice provides the RGB LED Driver Demo design programmed in the board. The RGB LED Driver Demo used in

conjunction with the software GUI illustrates the use of a PWM driver controlling the LEDs on the board. Below is a

description of the control jumpers for each LED.

• The RGB LED will transition colors

— J4 can be used to probe RGB LED (Default shunted). If you remove J4, the RGB LED will not light up.

• The IR LED is controlled when a shunt is placed across J50 pins 1-2

• The Bar Code LED is controlled when a shunt is placed across J29 pins 2-3 (Default shunted)

Figure 2 shows the default board shunt locations.

Figure 2. Default Shunt Locations

J3 - Enable DONE LED

J9 – Isolate

SPI Flash CSn

J50 – Selects-

HP LED device

(IR or Torch)

J51 – Enable-

12 MHz clock

J4 –- RGB

Shunts

J10 – Program

SPI Flash or iCE5LP

iCE40 Ultra Breakout Board

Clock Sources

The board has a single 12 MHz clock source. The 12 MHz clock drives both the FTDI USB interface device, and the

iCE5LP4K device. The iCE5LP4K can be disconnected from the 12 MHz oscillator using J51. This is necessary, for

example, when iCE40 Ultra device ball C2 is mistakenly programmed as an output and prevents the FTDI USB

interface from operating.

Board Power

The board provides the following power features:

•BoardPower

— Board power is derived from the USB connection.

— D3 Green LED indicates Board Power

• iCE40 Ultra VCC

— Onboard 1.2 V supply

— ICC can be measured across the series resistor R38 (1 Ohm) at TP10 and TP11

• iCE40 Ultra VCCIO

— Onboard 3.3 V supply

— ICC0 can be measured across the series resistor R14 (1Ohm) at TP1 and TP2

— ICC1 can be measured across the series resistor R96 (1Ohm) at TP8 and TP9

— ICC2 can be measured across the series resistor R15 (1Ohm) at TP3 and TP4



The power supplies on the iCE40 Ultra Breakout Board are simplified and suitable for booting from the external SPI

flash. The power supply sequencing does not conform to the NVCM boot requirements as specified in DS1048,

iCE40 Ultra Family Data Sheet. The user may encounter intermittent boot success and/or higher than specified

startup currents when attempting to boot from NVCM.

Board Configuration and Programming

The board allows for programming of the iCE40 Ultra or the SPI Flash:

• SPI Flash Programming J10 shunt pins 1-3 and 2-4 (Default shunted)

— U7 Micron Technology Inc part number N25Q032A13ESC40F

• iCE40 Ultra Configuration or Programming J10 shunt pins 1-2 and 3-4

— U8 iCE5LP4K-SWG36

• CRESETB can be asserted by pushing SW1

— Can be probed with J2

• Done LED D2

— Can be probed with J3 (Default shunted)

Details of the iCE40 Ultra Board for use in programming are shown in Figure 3.

iCE40 Ultra Breakout Board

Figure 3. Configuration and Programming Details

J2 CRESETB Probe

J9 – Isolate

SPI Flash CSn

J50 Selects

HP LED Device

(IR or Torch)

J10 – Program

SPI Flash or iCE5LP

CRESETB

Push-Button

D2 – DONE LED

USB Interface

Socket

U8 –

iCE5LP4K -SWG36

U7 –

N25Q032A13ESC40F

–

iCE40 Ultra Breakout Board

Test Points

The board features a number of headers and test connections which provide access to the iCE40 Ultra I/Os:

Figure 4. J6 Header ‘A’ Breakouts

Figure 5. J7 Header ‘B’ Breakouts

Figure 6. J5 PMOD Connector

HEADER A

HEADER B

PMOD CONNECTOR

iCE40 Ultra Breakout Board

Figure 7. J7 Header ‘B’ Breakouts

The break-out headers and test connectors are shown in Figure 8.

Figure 8. Breakout Headers

AARDVARK CONNECTOR

J6 – “Header A”

J7 – “Header B”

J1 – Aardvark SPI

emulator connector

J5 – PMOD Connector

iCE40 Ultra Breakout Board

RGB LED Demonstration Design and Software GUI

The iCE40 Ultra Breakout Board can demonstrate a complete controller for an RGB LED. These are the steps nec-

essary to run the demonstration.

1. Ensure that the RGB LED GUI is installed.

2. Make sure the jumpers on J10 are both in the vertical position. This is the default pins 1-3 and 2-4 shorted

together.

Figure 9. SPI Flash Selection (Vertical) for J10

3. Connect the iCE40 Ultra breakout board via the USB cable to a PC or MAC.

iCE40 Ultra Breakout Board

4. After the iCE40 Ultra device has initialized and the RGB LED is illuminated RED, change the J10 jumper posi-

tions to horizontal, shorting pins 1-2 and 3-4. This is required to allow the USB port to communicate with the

iCE40 Ultra device.

Figure 10. iCE Selection (Horizontal) for J10

5. Start the RBG GUI on the PC or MAC.

Figure 11. iCE40 Ultra LED Demonstration Interface

Now you can control the RGB LED on the iCE40 Ultra Breakout Board. You can set the color, brightness, blinking

rate as well as breathing.

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