User Manual
Table Of Contents
- 1. Introduction
- 2. GR47/GR48 Radio Devices
- 3. Abbreviations
- 4. Mechanical Description
- 5. System Connector Interface
- 5.1 Overview
- 5.2 General Electrical and Logical Characteristics
- 5.3 Grounds
- 5.4 VCC - Regulated Power Supply Input
- 5.5 Battery Charging Input (CHG_IN)
- 5.6 Turning the Radio Device ON/OFF and the External Power Signal
- 5.7 Analogue Audio
- 5.8 PCM Digital Audio
- 5.9 Serial Data Interfaces
- 5.10 SIM Card Related Signals
- 5.11 Service/Programming
- 5.12 Buzzer
- 5.13 LED
- 5.14 General Purpose Digital I/O Ports
- 5.15 Extended I/O capabilities
- 5.16 General Purpose Analogue I/O Ports
- 5.17 External I 2C Serial Control Bus
- 5.18 TX_ON - Burst Transmission
- 5.19 Real Time Clock
- 6. Antenna Connector
- 7. Keyboard Interface
- 8. Hints for Integrating the Radio Device
- 9. Embedded Applications
- 10. TCP/IP Stack
- 11. Technical Data
- 12. Declaration of Conformity
- 13. Introduction to the Developer’s Kit
- 14. Using the Developer’s Kit
13. INTRODUCTION TO THE DEVELOPER’S KIT
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LZT 123 7589 R1A
13.2 General Functioning of the Kit
The following block diagrams are provided to help you understand the
general principles of operation of the developer’s kit.
You can use the kit’s connectors to access and control the radio device (all
switches and jumpers in their default positions).
Figure 13.1 shows the various on-board voltages and how they are fed to
the radio device and other circuitry. The developer’s board is powered by
an external power supply connected to Vcc, see below. The power to the
developer’s board circurity is selectable from internal or external 3V6
source.
Figure 13.1 Power supply connection and the on-board voltages
VIO
LED
VIO
GR47
or
GR48
VCC
DGND
VCC
Switch
n/c
5V? 32V
DC Jack
External
3.6V
To Development board and
interface circuits
INT EXT
3V6
Reg