Lattice Semiconductor POWR607 Manuale utente

July 2014

EB86_01.0

POWR607/6AT6 Evaluation Board

User’s Guide

POWR607/6AT6 Evaluation Board

Introduction

Thank you for choosing the Lattice Semiconductor POWR607/6AT6 Evaluation Board!

This user’s guide describes how to start using the POWR607/6AT6 Evaluation Board, an easy-to-use platform for

evaluating and designing with the Lattice Power Manager II devices, POWR607 and POWR6AT6. The Evaluation

Board has pre-loaded Processor Support demonstration design. You may also reprogram the

POWR607/POWR6AT6 to review your own custom designs.

Note: Static electricity can severely shorten the lifespan of electronic components. See the POWR607/6AT6 Evalu-

ation Board QuickSTART Guide for handling and storage tips.

Features

• POWR607/6AT6 Evaluation Board - A 3.75 by 2.00 inches form factor that features the following on-board com-

ponents and circuits:

– Power Manager II ispPAC®-POWR607

– Power Manager II ispPAC® -POWR6AT6

– LEDs for general purpose I/O, power indicators, and watchdog timer interrupt indication

– Slide potentiometer

– USB B-mini connector for power and programming

– 2x14 expansion header for general I/O, voltage monitor inputs, and power supply trim outputs

– Push buttons for reset and watchdog timer trigger

– 4-bit DIP switch for watchdog timer period programming and reset pulse stretch enable

– JTAG and I2C header landings for JTAG cable programming and I2C interface

• Pre-loaded Processor Support Demo - The board includes a pre-loaded demo design that demonstrates watch-

dog timer, voltage supervisor, and reset generation features of the POWR607.

• USB Connector Cable - The POWR607/6AT6 Evaluation Board is powered from the mini B USB socket when

connected to a host PC with the included USB cable. The USB channel also provides a programming interface to

the POWR607/6AT6 and POWR6AT6 JTAG ports.

• QuickSTART Guide - Provides information on connecting the POWR607/6AT6 Evaluation Board, running the

pre-loaded processor support demo.

• POWR607/6AT6 Evaluation Board Web Page - Provides access to the latest documentation, demo designs, and

drivers for the kit. See www.latticesemi.com/boards and look for the POWR607/6AT6 Evaluation Board.

The contents of this user’s guide include demo operation, programming instructions, top-level functional descrip-

tions of the evaluation board, descriptions of the on-board connectors, switches and a complete set of schematics

of the board.

Software Requirements

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

• PAC designer 6.25 or later

• Lattice Diamond Programmer

POWR607/6AT6 Evaluation Board

Figure 1. POWR607/6AT6 Evaluation Board, Top Side

Slide Potentiometer (R16)

PWR LED (D1)

WD_INT LED (D11)

USB

WD_Trig Push Button DIP Switch (1, 2, 3, 4)

Reset Push uon

Thru-Hole Prototype Area

SEL1 LED (D6)

SEL0 LED (D5)

RST LED (D4)

CPU RESET LED (D2)

SMD Prototype Area

Expansion Header

POWR6AT6

POWR607

JTAG Header

I2C Header

POWR607/6AT6 Evaluation Board

Figure 2. POWR607/6AT6 Evaluation Board, Bottom Side

VMON Attenuation Networks

Bottom SMD Prototype Area

POWR607/6AT6 Evaluation Board

POWR607 Device

This board features the POWR607, an in-system programmable, mixed-signal PLD that integrates high-perfor-

mance analog voltage monitors, 4 timer counter blocks, and a 16-macrocell programmable logic device. A com-

plete description of this device can be found in the DS1011, ispPAC-POWR607 Data Sheet.

Demonstration Designs

Lattice provides two demos that illustrate key applications of the Power Manager II devices POWR607 and

POWR6AT6:

•Processor Support - Demonstrates the POWR607 as a power manager for a processor, DSP, ASSP, or ASIC. It

integrates three functions traditionally covered by discrete ICs: voltage supervisor, reset generator, and watch-

dog timer. The programmable features of the POWR607 highlight its flexibility to be used in a variety of system

support roles. The processor support demo design is pre-loaded into the POWR607 by Lattice.



Note: The processor support demo program (JEDEC) differs slightly from the Initial Factory Configuration

described in DS1011, ispPAC-POWR607 Data Sheet. WDT_Intr output is active-high in the demo program, and

active-low in the factory configuration.

•Voltage Monitoring - Shows application of the ispPAC-POWR6AT6 to provide supply measurements via an I2C

interface. The voltage monitoring support demo design is pre-programmed into the POWR6AT6 by Lattice with

the I2C address of 0x6A.



Note: It is possible that you may obtain your POWR607 board after it has been reprogrammed. To restore the

factory default demo and program it with other Lattice-supplied examples see the Download Demo Designs and

Download Windows Hardware Drivers sections of this document.

Processor Support Demo

The processor support demo is pre-programmed into the non-volatile elements of the POWR607 and POWR6AT6

devices and is operational upon power-up. The design provides the following features:

• Detect voltage supply violations and assert a CPU reset if a fault occurs.

• Provide a 500ms, 2 sec, 10 sec, or 1 min period watchdog timer and assert a watchdog timer interrupt if a timer

expires before a watchdog trigger interrupt occurs.

• Assert CPU reset pulses if manual reset of the board occurs. Provide an optional 200ms pulse stretch of the

reset.

• De-bounce manual reset input.

A PAC-Designer software project (.pac) defines the analog trip points for the POWR607 voltage monitors, timer-

counter period, and supervisory equations that define logical functions.

POWR607/6AT6 Evaluation Board

Figure 3. Processor Support Demo Block Diagram

Table 1 describes the DIP switch, push-button inputs, and slide potentiometer settings that control the pre-config-

ured POWR607 and emulate a variety of processor support scenarios. Use them as a reference as you follow the

procedure. To indicate a ‘1’ (logical True) on the DIP switch SW1, slide the switch towards the number indicated on

the switch body. Note the circuit board silkscreen markings for: VM3=1.8, RST=0, SEL0=0, and SEL1=0.

Table 1. Processor Support Demo Switch and Button Settings

Setting Function

DIP Switch (1, 2, 3, 4)

XX00

500ms WDT (SEL0=0, SEL1=0)

Enables a 500ms period watchdog timer (WDT).

When active, the POWR607 will monitor the terminal count (TC) value a programmable timer. Once

500ms expires, the WDT_Intr output is asserted. An amber WDT_INT LED (D11) will light momentarily

to indicate the WDT interrupt input to the processor/DSP is active. Once activated, you may reset the

WDT by pressing the push-button switch (WD_Trig) to emulate a WDT trigger event asserted by the pro-

cessor/DSP.

A red LED D5 will light when SEL0=0 and LED D6 will light when SEL1=0.

Note: For the demonstration scenario, an additional transistor circuit of the evaluation board stretches

WDT_Intr output period to make the interrupt event visible to the eye.

XX10 2 sec WDT (SEL0=1, SEL1=0)

Enables a 2-second period watchdog timer (WDT).

XX01 10 sec WDT (SEL0=0, SEL1=1)

Enables a 10-second period watchdog timer (WDT).

DC-DC#1

3.3V

(VMON1)

DC-DC#2

2.5V (-5%)

(VMON2)

DC-DC#3

1.8V

(VMON3)

Power,

Blue LED

R16 VM3

SW1- 8

PWR-D1

Power Supply

Bus

Voltage Supervisor

Reset

(SW2)

Reset Generator

Watchdog Timer

Reset_CPU

WDT_Intr

WDT_Trig

CPU Reset or

Power Fail (IO1-D2)

WDT Interrupt (D11)

WDT Sel

POWR607

Reset_Pulse

WD_Trig (SW3)

Processor/DSP

SEL1, SEL0 (SW1)

00 = 500ms

01 = 2 sec

10 = 10 sec

11 = 1 min

RST (SW1)

0 = No Stretch

1 = 200ms Stretch

POWR607/6AT6 Evaluation Board

Connect to the POWR607/6AT6 Evaluation Board

To power and program the evaluation board you may use a PC USB port or use a combination of an external 5 V

power supply and a JTAG cable. If your PC does not provide a USB port, see Adding Support for a JTAG Cable

and/or I2C Communications in the Modifying the POWR607/6AT6 Evaluation Board section.

USB Cable Connection

Use the USB cable provided to connect the evaluation board to your PC:

1. Connect the USB cable from a USB port on your PC to the board’s USB mini-B socket (J1) on the bottom left

side of the board. After connection is made, a blue Power LED (PWR) will light up indicating the board is pow-

ered on.

2. If you are prompted, “Windows may connect to Windows Update” select No, not this time from available

options and click Next to proceed with the installation. Choose the Install from specific location (Advanced)

option and click Next.

3. Select Search for the best driver in these locations and click the Browse button to browse to the Windows

driver folder created in the Download Windows Hardware Drivers section. Select the CDM 2.04.06 WHQL Cer-

tified folder and click OK.

4. Click Next. A screen will display as Windows copies the required driver files. Windows will display a message

indicating that the installation was successful.

5. Click Finish to install the USB driver.

XX11 1 min WDT (SEL0=1, SEL1=1)

Enables a 1-minute period watchdog timer (WDT).

X0XX Disable Reset Pulse Stretch (RST=0)

Disables the reset pulse stretch option of POWR607. A red LED D4 will light when RST=0.

X1XX

Enable 200ms Reset Pulse Stretch (RST=1)

Appends an additional 200 ms period to any processor/DSP reset output asserted by the POWR607.

Programmable clock and timer functions of the POWR607 allow for a variety of timeout intervals from 32

us to 1.96 sec in 128 steps. It may be necessary to connect a logic analyzer to detect the pulse

stretch.

0XXX 1.8 V Supply OK (VM3=1.8)

Connects the 1.8V supply rail to the voltage monitor input (VMON3) of the POWR607.

This setting emulates a stable 1.8 V supply.

1XXX 1.8 V Supply Failure (VM3=High-Z)

Disconnects the 1.8 V supply rail from the voltage monitor input (VMON3) of the POWR607.

This setting emulates a DC-DC converter or other supply failure on the PCB. The POWR607 will assert

the Reset_CPU output signal to initiate a reset of the processor/DSP target device. A red LED (D2) will

light to indicate the power fail condition.

Push-button Switch

WD_Trig WDT Trigger

Press the push-button switch (WD_Trig) to emulate the watchdog timer reset trigger issued periodically

for normal operation by the processor/DSP.

Reset Manual Reset

Press the push-button switch (Reset) to assert a manual reset of the evaluation board. All timers of the

POWR607 will be cleared and the Reset_CPU output signal will be asserted.

Slide Potentiometer

R16 Voltage Supervisor Input

A slide potentiometer emulates the variability of a 2.5 V voltage rail on the PCB. Slide the pot towards

the 0.0 V

position to lower the voltage level input to the POWR607 voltage monitor (VMON2).

Setting Function

POWR607/6AT6 Evaluation Board

JTAG Cable Connection

Use a JTAG cable (sold separately) to connect the evaluation board to your PC:

1. Connect external +5 V and GND power to pad locations J5 and J6 (Schematic Sheet 5 of 6).

2. Connect a JTAG cable from a JTAG source to the board’s JTAG header (J3) (Schematic Sheet 5 of 6) on the

right side of the board.

See Adding Support for a JTAG Cable and/or I2C Communications in the Modifying the POWR607/6AT6 Evaluation

Board section for information on how to modify the evaluation board to add a JTAG header connection.

Run the Processor Support Demo

The POWR607 Processor Support Demo illustrates key functions of the POWR607: voltage supervisor, reset gen-

erator, and watchdog timer (WDT). The block diagram of the processor support demo, Figure 3, shows the

POWR607 interface to a simulated processor/DSP. LEDs and switches are used to emulate the processor inter-

face.

Many processor power management scenarios can be shown with the POWR607 evaluation board. Follow the pro-

cedure below to emulate one particular case.

1. Set the POWR607 configuration to indicate 1.8 V Supply OK, disable reset pulse stretch and enable a two- sec-

ond watchdog timer period. 



Select DIP Switch (1, 2, 3, 4) = 0010



Note: To indicate a logical 1, slide the switch towards the 1, 2, 3, or 4 numeral marks on the case. Select the

R16 Slider = 3.3 V position.

2. Press and then release the Reset push button. 



The POWR607 Evaluation Board is reset. The CPU Reset LED (D2) lights to indicate the reset condition. The

WDT timer is reset and the two-second WDT count begins.

3. Press and release the WD_Trig push button.



The WDT_Trig signal is asserted by the processor/DSP. The POWR607 timer/counter is reset and the two- sec-

ond watchdog timer restarts.



Continue pressing the WD_Trig to “pet” the watchdog timer to prevent the two-second timeout.

4. Wait for two seconds and allow the WDT timer period to expire.



The POWR607 asserts the WDT_Intr output signal and the WDT_Interrupt LED (D11) lights momentarily to

indicate the interrupt condition.



In the next step you will increase the watchdog timer period from 2 seconds to 10 seconds and enable Reset

Pulse Stretch.

5. Select SW1 (1, 2, 3, 4) = 0101. Also select the R16 Slider = 3.3 V position. Press and release the Reset push

button on the POWR607 board.



The CPU Reset LED (D2) light indicates the reset condition. The WDT timer is reset and the 10-second WDT

count begins.



The following steps emulate a brown out condition of a 2.5 V supply rail output of a DC-to-DC converter (DC-

DC#2) monitored by the POWR607.

POWR607/6AT6 Evaluation Board

6. Slowly slide R16 towards the 0.0 V position. 



Once the POWR607 voltage monitor detects the 2.5 V supply rail has dropped below a 2.5 V -5% threshold

value a supply fault will be triggered and the Reset CPU output signal is asserted. The CPU Reset LED (D2)

light indicates the reset condition. Note that the POWR607 watchdog timer is also disabled.

7. Slide R16 toward the 3.3 V position. Once the POWR607 voltage monitor detects that the 2.5 V rail is above a

threshold value of 2.5 V -5%, the Reset CPU output signal is released. The CPU Reset LED (D2) light goes out.

Run the Voltage Monitoring Demo

The voltage monitor demo illustrates how to access the 2-wire I2C slave interface of the ispPAC-POWR6AT6 device

to perform voltage level measurements. This is a popular means for a microcontroller/microprocessor to monitor

voltages and adjust the voltage profiles of the POWR6AT6 DC-DC converter margin output drivers. For more infor-

mation on POWR6AT6 end applications see AN6077, Stable Operation of DC-DC Converters with Power Manager

Closed Loop Trim. This demo uses the ispPAC-POWR6AT6 I2C Utility software provided with PAC-Designer soft-

ware running on a host PC to emulate a processor’s interface to the POWR6AT6.

1. Modify the evaluation board to use the JTAG cable. See Adding Support for a JTAG Cable and/or I2C Communi-

cations in the Modifying the POWR607/6AT6 Evaluation Board section for more information.

2. Install PAC-Designer software.

3. From the PAC-Designer<ver>\Macro directory, run PowerManager_6AT6_I2C_Utility.exe. For more information

on the I2C Hardware Verification Utility software and operation see AN6067, ispPAC-POWR1220AT8 I2C Hard-

ware Verification Utility User’s Guide.

4. Set I2C Address = 6Ah

Download Demo Designs

The processor support demo is preprogrammed into the POWR607 Evaluation Board, however over time it is likely

your board will be modified. Lattice distributes source and programming files for demonstration designs compatible

with the POWR607 board.

To download demo designs:

1. Browse to the POWR607 Development Kit web page of the Lattice web site. Select the Demo Applications

download and save the file.

2. Extract the contents of “POWR607_DK_DemoSource.zip” to an accessible location on your hard drive.

Two demo design files are unpacked. 



Where:

Recompile a Demo Project with PAC-Designer

Use the procedure described below to recompile any of the demo projects for the POWR607 Evaluation Board.

1. Install PAC-Designer software

2. Download the demo source files from the POWR607 Development Kit web page.

3. Run PAC-Designer.

4. Open the <demo>.pac project file.

5. From the schematic block diagram, double-click the Sequence Controller block. The LogiBuilder interface

appears.

Demo Files

Processor Support Demo Demo_POWR607_DK.pac

Voltage Monitoring with the POWR6AT6 Demo Demo_POWR6AT6_DK.pac

POWR607/6AT6 Evaluation Board

6. Choose Tools > Compile LogiBuilder Design. After a few moments the JEDEC programming file is output.

7. See the Processor Support Demo section of this document for details on downloading a programming file to the

board.

Download Windows Hardware Drivers

If you wish to reprogram the POWR607/6AT6 Evaluation Board, you will need to obtain the necessary hardware

drivers for Windows. If your installation of Windows does not automatically install USB drivers when the evaluation

board is connected to a USB port, then use the procedure below to download them from the Lattice web site.

To download Windows Hardware Drivers:

1. Browse to the POWR607/6AT6 Evaluation Board web page, locate the hardware device drivers for the

USB/JTAG interface. See www.latticesemi.com/boards and look for the POWR607/6AT6 Evaluation Board.

2. Download the ZIP file to your system and unzip it to a location on your PC.

Programming with Lattice Diamond Programmer

The processor support and voltage monitoring demo designs are pre-programmed into the POWR607/6AT6 Evalu-

ation Board by Lattice. To restore a POWR607/6AT6 Evaluation Board to factory settings or load an alternative

demo design, use the procedures in this section.

To install Lattice Diamond Programmer:

1. Install Lattice Diamond or standalone Lattice Diamond Programmer.

2. Connect the board to a host PC using the USB port or JTAG header connection.

3. Follow the USB Cable Interface or JTAG Cable Interface procedure below to program the evaluation board.

USB Cable Interface

The POWR607/6AT6 Evaluation Board is equipped with a built-in USB-based programming circuit. This consists of

a USB PHY and a USB connector. When the board is connected to a PC with a USB cable, it is recognized by the

Diamond Programmer as a “USB Download Cable”. The POWR607 and POWR6AT6 can then be scanned and

programmed using the Diamond Programmer.

To program a demo programming file:

1. From the Start menu, click All Programs > Lattice Diamond > Accessories > Diamond Programmer . 

Diamond Programmer starts.

2. The Diamond Programmer – Getting Started dialog box appears.

3. Select the following options:

Create a New Project from a Scan.



Cable: USB2 Port: FTUSB-0



Click OK.

4. The Diamond Programmer window appears. 



The New Scan Configuration Setup window appears. The ispPAC-POWR607 and ispPAC-POWR6AT6

device(s) appear in the device list. In case the devices fail to appear, try doing scanning again



In Programmer, choose Design > Scan or click in the toolbar. Programmer opens a new chain configuration

file, scans the printed circuit board connected to your computer, and lists the devices in the new chain file.

5. Make sure the Operation is Erase, Program, Verify.

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