User's Manual

AnyDATA.NET Inc. AnyTime AnyPlace Any Wireless Data Solution

4. Interface Descriptions

4.1 Overview

This chapter covers information required to convert the DTG2000-Dual V2.0 into a subscriber unit

application. In addition, some of the internal blocks of the device are described. Understanding these

internal blocks is necessary for one to completely grasp the functions of the various interfaces.

This chapter discusses the interface to the major blocks of the DTGD2000-Dual V2.0 as shown in

the following figure. These blocks include:

 Power Up

 CODEC Interface

 UART Interface

 General Purpose Interface

 External Hardware Reset

 User Interface

4.2 Powering Up the Module

There are two ways to power up the module and customers may choose one of the two ways to power

up DTG2000-Dual V2.0.

4.2.1 Supply input to +VEXT_DC (Pin 87 and Pin 89)

If the customers don’t need to save current in sleep mode, which is around 15mA, supplying the

voltage input to +VEXT_DC (Pin 87 and 89) is recommended.

When the input voltage from +4V to +5.0V is supplied, DTG2000-Dual V2.0 will automatically start its

power-on process and finish it within 2 seconds. In this case, using a regulator with an enable pin is

highly recommended so that the customer can reset the module using the enable pin if software lock-up

symptoms are found.

If a customer needs to use charging circuit built in the module, apply +4.5V DC to +VEXT_DC (Pin87

and 89) and connect the 3.6V 1cell lithium-ion battery to BATT_INT (Pin88 and 90).

AD-2001-06-28 Ver 1.1

-20-