Longcheer Technology A8000 User Manual

A8000 User Guide

Confidential

Document Name: A8000 User Guide

Version: 1.0

Date: May 13th, 2009

DocId: A8000_User_Guide_V1.0

Status: Confidential / Released

LONGSUNG GSM MUDLE

A8000 user guide describes interfaces, function and application, which is provided to
LONGSUNG’s customers for testing, evaluation, integration and information.

LONGSUNG reserves the right to make changes without further notice to any products herein.
LONGSUNG makes no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does LONGSUNG assume any liability arising out of the
application or use of any product or circuit, and specifically disclaims any and all liability,
including without limitation consequential or incidental damages. LONGSUNG does not convey
any license under its patent rights nor the rights of others.

COPY RIGHT

The document contains LONGSUNG Proprietary Information; therefore, NOT to be used, copied,
reproduced in whole or in part, nor its contents revealed in any manner to others without the express
written permission of LONGSUNG Technology.

Copyright © LONGSUNG 2009

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VERSION HISTORY

ersion Author Date Chapter What is new

V1.0 Liu Zhongrong 2009-5-13 Create

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CAUTION: A8000 module is an ESD (electrostatic discharge) sensitive device. Electrostatic

charges as high as 1 K Volts readily accumulate on the human body and test equipment and can
discharge without detection. Permanent damage may occur on devices subjected to high-energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.

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Contents

1．Introduction................................................................................................................................5

1.1 Overview............................................................................................................................................... 5

1.2 A8000 Key Features........................................................................................................................... 5

1.3 Operating Modes................................................................................................................................6

2.1 Power Supply...................................................................................................................................... 7

2.1.1 Power Supply Pads on A8000..................................................................................................................... 7

2.1.2 Turn On / Off A8000.......................................................................................................................................8

2.1.2.1 Turn On A8000........................................................................................................................................8

2.1.2.2 Turn Off A8000........................................................................................................................................8

2.1.3 Power Saving................................................................................................................................................. 8

2.1.3.1 Sleep Mode............................................................................................................................................. 8

2.1.3.2 Wake Up A8000 From SLEEP Mode...................................................................................................8

2.1.6 RESET_N .......................................................................................................................................................9

2.2 UART Interface .................................................................................................................................... 9

2.2.1 UART Interface Description..........................................................................................................................9

2.3 SIM Interface...................................................................................................................................... 10

2.3.1 SIM Interface description............................................................................................................................ 10

2.5 LCD Interface..................................................................................................................................... 10

2.5.1 LCD Interface Description.......................................................................................................................... 10

2.6 ADC.......................................................................................................................................................11

2.7 Backlight............................................................................................................................................. 12

2.7.1 Backlight Control Description..................................................................................................................... 12

2.8 Keypad Interface............................................................................................................................... 12

2.8.1 Keypad Interface Description..................................................................................................................... 12

2.9 IIC Interface........................................................................................................................................ 13

2.9.1 Interface Description................................................................................................................................... 13

2.10 Parallel Port Interface ................................................................................................................... 13

2.12 Others ............................................................................................................................................... 14

2.13 General Purpose Input Output (GPIO)...................................................................................... 15

3 Electrical Characteristics and Reliability............................................................................15

3.1 Absolute Maximum Ratings.......................................................................................................... 15

3.3 Power Supply Ratings .................................................................................................................... 15

3.4 Electrostatic Discharge.................................................................................................................. 16

4 Mechanics....................................................................................................................................16

4.1 Mechanical Dimensions Of A8000............................................................................................... 16

4.2 Mounting A8000 onto the application platform........................................................................ 17

4.3 Pins Assignment Of A8000............................................................................................................ 17

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1．Introduction

1.1 Overview

LONGSUNG A8000 is a dual band GSM/GPRS module that works on 850MHz/1900MHz.
Powered by Infineon PMB7880 chipset, A8000 features GPRS multi-slot class 10 and supports the
GPRS coding schemes CS-1, CS-2, CS-3 and CS-4.

With power saving technique, A8000 can minimize current consumption to as low as 5.5mA in
SLEEP mode, and is able to wake up on demand and to resume power saving automatically if no
activity is required.

For battery powered applications, MC55/56 features a charging control which can be used to charge
NiCd, Ni-Mh, Li-Polymer and Li-ON batteries. The charging circuit must be implemented outside
the module on the application platform.

1.2 A8000 Key Features

The GSM module A8000 supports audio, SMS, and data transfer. Table1-1 lists the features of
A8000.

Table1-1 A8000 key features

Feature Implementation

Power supply Single supply voltage 3.5V – 4.2V

Power saving Typical power consumption in SLEEP mode to 5.5mA

Frequency bands • band

850MHz, 1900MHz

• Compliant to GSM Phase 2/2+

GPRS class Class 10

Temperature range • Normal operation: -20°C to +55°C

• Restricted operation: -30°C to -20°C and +55°C to +80°C

• Storage temperature -40°C to +80°C

SMS • MT, MO, CB, Text and PDU mode

• SMS storage: SIM card

SIM interface Supported SIM card: 1.8V ,3V

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External antenna Connected via 50 Ohm antenna connector or antenna pad

Audio features Speech codec modes:

Serial interface •seven lines on serial port Interface;

Phonebook management Supported phonebook types: SM, FD, LD, RC, ON, MC.

SIM Application Toolkit Supports SAT class 3, GSM 11.14 Release 98

Real time clock Implemented

• Half Rate (ETS 06.20)

• Full Rate (ETS 06.10)

• Enhanced Full Rate (ETS 06.50 / 06.60 / 06.80)

• Echo suppression

•software download;

•print debug information.

Physical characteristics Size: 28(±0.15) x 20(±0.15) x 2.85(±0.3) mm

Firmware upgrade Firmware upgradeable over serial interface

Parallel port Connects with external parallel port devices

1.3 Operating Modes

The table1-2 below briefly summarizes the various operating modes referred to in the following
chapters.

Table1-2 Overview of operating modes

Mode Function

GSM / GPRS
SLEEP

Module will automatically go into SLEEP mode if there is no on air or audio activity is
required and no hardware interrupt (such as GPIO interrupt or data on serial port).

In this case, the current consumption of module will reduce to the minimal level.

During sleep mode, the module can still receive paging message and SMS from the
BTS.

GSM IDLE Software is active. Once registered to the GSM network, paging with BTS is carried

out, and the module is ready to send and receive.

GSM TALK Connection is going on between two subscribers. In this case, the power consumption

depends on network settings.

GPRS IDLE

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Module is ready for GPRS data transfer, but no data is currently sent or received. Power
consumption depends on network settings and GPRS configuration (e.g. multi-slot
settings).

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GPRS DATA

SWITCH OFF Normal shutdown by using the SWITCH_ON. In this case only the power supply for the

GPRS data transfer in progress. Power consumption depends on network settings (e.g.
power control level), uplink/downlink data rates and GPRS configuration (e.g. used
multi-slot settings).

RTC is remained. Software is not active. So the application interfaces cannot work.
Operating voltage (connected to VBAT) remains applied.

2.1 Power Supply

The power supply of the GSM engine has to be a single voltage source in the range of 3.5V～4.2V.
It must be able to withstand a sufficient current in a transmission burst which typically rises to 2A
instantly. Additionally, the power supply must be able to account for increased current consumption
if the module is exposed to inappropriate conditions, for example antenna mismatch.

2.1.1 Power Supply Pads on A8000

2 VBAT pads of A8000 connector are dedicated to connect the supply voltage, and 10 GND pads
are recommended for grounding. VDD_LRTC used to back up RTC and VDD_LIO is a 2.85V LDO
output for user application, max current 15mA, SWITCH_ON has the ON/OFF key function and
RESET_N can reset system with logic low level. Table2-1 lists the power supplies of A8000.

Table2-1: Power supplies of A8000

Signal Name PIN No. I/O Description Notes

VBAT 61,62 I

CDT 64 I

CS 65 O

Positive operating voltage

Charger detect(only for A8000

recommended charging

scheme, see Figure2-4)

Charging switch(only for

A8000 recommended charging

scheme, see Figure2-4)

3.3 V-4.2 V, I
transmit burst, the minimum
operating voltage must never fall
below 3.3 V.

-

-

≤ 2 A during

typ

VDD_LRTC 43 I/O

VDD_LIO 18 O

SWITCH_ON 44 I

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Can be used to back up

the RTC when VBAT is not

applied.

A8000 LDO output, can used

to drive led.

ON/OFF key to turn on/off

A8000.

1.8-2.0V, 4mA

Output voltage 2.85V, and the max

output drive current not exceed 15mA

Pull the pin up to the VDD_LRTC to

turn on/off A8000.