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ZestSC1 User Guide

CONFIDENTIAL Page 5 of 57

4 Introduction

Thank you for purchasing a ZestSC1. This user guide explains how to install the ZestSC1

and how to start using it with some examples. Please read this guide fully before starting

to use the ZestSC1.

5 System Requirements

1. A host computer or USB hub with an available USB port. The USB port may be either

Full Speed 12Mbps (USB V1.1 or 2.0) or High Speed 480Mbps (USB V2.0).

2. Windows 2000 or Windows XP operating system.

3. Space about 150 x 150 mm on a desk or bench near the host computer for placing

the board.

4. Operating ambient temperature range 0 to +40 deg C.

Storage ambient temperature range -40 to +85 deg C.

5. ZestSC1 can be either bus-powered (power is drawn from the USB port) or self-

powered (power is drawn from either a PC hard disk power connector or a mains

power wall adapter (not supplied unless ordered separately)).

a) If the USB port is to be used to supply power (ZestSC1 is bus-powered)

then it must be a high power (500mA) port. Most computer USB ports are

high power but see paragraph i) below for how to determine the power rating of a

USB port. For USB hubs see paragraph ii) below. A high power USB port provides

2.5W. The quiescent power of ZestSC1 is given in the section titled Power.

i) To determine the power rating of a computer USB port, do the following:

(1) Go to Control Panel -> System -> Hardware -> Device Manager ->

Universal Serial Bus Controllers.

(2) Right click a USB Root Hub, then go to Properties -> Power.

(3) Under Hub information, Total power available should be 500mA per port.

(4) Repeat for all USB Root Hubs.

ii) If ZestSC1 is to be bus-powered use only self-powered USB hubs with

high power (500mA) ports. Bus-powered USB hubs generally have only

low power (100mA) ports and should be used only if ZestSC1 is self-powered.

The documentation for your USB hub should give the power rating of the

ports.

b) If more than 2.5W of power is required then a PC hard disk power connector or a

mains power wall adapter can be used to make the board self-powered. The wall

adapter should be switch mode with low ripple and have an output voltage

between 3.5V and 5.5V (nominally 4.5V or 5.0V), an output current of at least

1A, and a female plug inner diameter of 2.5mm. The plug from the wall

adapter should have +5V power on the outside of the pin and ground on

the inside of the pin.

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