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Migration Guide

Differences Between GR64 and
GR4x Wireless CPU

®

Devices

Reference:

WI_DEV_GR64_DVD_001

Version:

002

Date:

April 18, 2007

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Summary of Contents for GR4x

Page 1: ...Migration Guide Differences Between GR64 and GR4x Wireless CPU Devices Reference WI_DEV_GR64_DVD_001 Version 002 Date April 18 2007 ...

Page 2: ...red trademarks of Wavecom S A in France or in other countries All other company and or product names mentioned may be filed or registered trademarks of their respective owners Copyright This manual is copyrighted by WAVECOM with all rights reserved No part of this manual may be reproduced in any form without the prior written permission of WAVECOM No patent liability is assumed with respect to the...

Page 3: ...WAVECOM Not to be distributed or divulged without prior written agreement Ce document est la propriété exclusive de WAVECOM Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable Revision History Edition Date Change Information 001 04 04 2007 First Edition 002 04 18 2007 Added warning to Section 4 ...

Page 4: ...2 1 GR64 VARIANTS 2 2 1 1 INTEGRATED SIM VARIANT 2 2 1 2 LEGACY VARIANT 2 2 2 NOTEWORTHY DIFFERENCES 3 2 2 1 GSM FREQUENCY COVERAGE 3 2 2 2 GPRS OPERATING CLASS 3 2 2 3 UARTS 5 2 2 4 DIGITAL IO 5 2 2 5 PCM AUDIO 6 2 2 6 SIM INTERFACE 9 2 2 7 DAC INTERFACE 9 2 2 8 ADC INTERFACE 9 2 2 9 SPI 9 2 2 10 SLEEP MODE 9 2 2 11 MECHANICAL FORM FACTOR 10 2 3 GENERAL OBSERVATIONS 10 3 Product Comparison 11 3 1...

Page 5: ...Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable 3 2 8 FORMER UART2 19 3 2 9 19 FORMER PCM AUDIO DIGITAL CODEC INTERFACE 3 2 10 20 ALARM 3 2 11 20 SERVICE SIGNAL 3 3 21 GENERAL SIGNAL DIFFERENCES 3 3 1 21 AUDIO INTERFACES 3 3 2 22 MULTIPLEXED SIGNAL FUNCTIONS 3 4 22 SOFTWARE COMPATIBILITY 3 4 1 23 SIGNAL BEHAVIOUR 3 4 2 23 AT COMMANDS 4 Mechanical Comparisons 26 G...

Page 6: ...The GR64 shares a large degree of commonality with the GS64 with the exception that its mechanical form factor physical interface and signal characteristics are designed to be closely aligned to the existing products listed above thereby providing a convenient path for upgrade Some differences do exist between the existing GM GR4x products and the new GR64 This Migration Guide highlights the diffe...

Page 7: ...the Wireless CPU allowing the host to provide its own I O reference Additionally the integrated SIM variant is available with or without Embedded Applications capability 2 1 2 Legacy Variant The legacy variant GR64 relies on an off board SIM connection accessible through the system connector The legacy variant does not support the RTC alarm but does allow legacy applications to retain digital PCM ...

Page 8: ...like its predecessors which were dual band The GR64 provides seamless GSM coverage in all regions of the world in the following GSM bands GSM 850 E GSM 900 GSM 1800 GSM 1900 2 2 2 GPRS Operating Class The GR64 is a GPRS Class 10 capable device compared with its predecessors which were Class 8 GPRS Class marking defines the number of uplink and downlink slots that are permissible as the following t...

Page 9: ...upon the Coding Scheme CS in use the table above shows the range of rates that are achievable within the CS classes supported by the GR64 The major impact of GPRS Class differences between the GR64 and legacy products is the demand upon power supplies to maintain peak currents during the increased number of transmission bursts within a single GSM timeslot The major impact is in the lower GSM bands...

Page 10: ...n internal 2 8V regulator performing the necessary bi directional level translation Some modification to existing user interface circuitry may be necessary due to the internal impedance of the level shifters themselves this is detailed in a subsequent section The integrated SIM variant GR64 employs the same level shifters and provides a VREF input signal so that users can provide an application si...

Page 11: ...pplication PCBs wired so that the respective PCM uplink and downlink paths are connected to remain unchanged However any external circuitry connected to these pins will not function Instead the advanced echo and noise canceling properties of the GR64 will compensate for the loss of such circuitry A PCM audio interface is still available in a standard 4 pin implementation for the integrated SIM var...

Page 12: ...iant showing new signal allocation Migration Guide This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement Ce document est la propriété exclusive de WAVECOM Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable GR4x to GR64 Page 7 of 28 ...

Page 13: ... legacy variant without risking damage to the host circuitry or the Wireless CPU In the legacy GR64 variant the links between pins 49 and 50 and their respective onboard circuits are disconnected by means of no mounted jumpers on the Wireless CPU itself Migration Guide This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement Ce d...

Page 14: ...ilable which can be used to create a DAC like function on the host application 2 2 8 ADC Interface The A to D converter in the GR64 has a higher resolution 10 bit compared with its predecessor device 8 bit and a different input range 2 2 9 SPI The GR64 no longer supports SPI as predecessors like the GR47 did 2 2 10 Sleep Mode Sleep mode functionality differs between GR64 and its predecessor produc...

Page 15: ... therefore the GR64 is a true drop in replacement for the GM GR4x products Comparative assemblies are shown in a subsequent section of this document 2 3 General Observations The fundamental difference in hardware and platform architecture between the GM GR4x and the GR64 means that there are bound to be some incompatibilities These have been minimized through deliberate and thoughtful replication ...

Page 16: ...e basic profile of the products the GR64 s variant configurations and inspect the mechanical mounting arrangement to confirm drop in compatibility 3 1 GR64 Signal Interface Pin Name Direction Function 1 VCC Input DC power 2 GND Ground 3 VCC Input DC power 4 GND Ground 5 VCC Input DC power 6 GND Ground 7 VCC Input DC power 8 GND Ground 9 VCC Input DC power 10 GND Ground 11 CHG_IN Input Battery char...

Page 17: ...k signal 2 8V logic 31 BUZZER Output Buzzer Output DSR1 Output Data Set Ready UART1 32 GPIO7 In Out General purpose IO LED Output LED control signal 33 GPIO6 In Out General purpose IO 34 VREF Output Core voltage reference 35 TX_ON Output Transmit indication RI Output Ring Indicator 36 GPIO8 In Out General purpose IO DTR1 Input Data Terminal Ready UART1 37 GPIO10 In Out General purpose IO DCD1 Outp...

Page 18: ...Name Direction Function 49 Reserved 50 ALARM Output RTC alarm 51 SSPFS In Out Serial PCM frame synchronization 52 SSPCLK In Out Serial PCM clock 53 MICIP Input Microphone input positive 54 MICIN Input Microphone input negative 55 EARP Output Earpiece output positive 56 EARN Output Earpiece output negative 57 AUXO Output Auxiliary audio from module to host 58 SERVICE Input Flash programming enable ...

Page 19: ...ned to accommodate existing applications but in doing so sacrifices some its predecessors capability because of the nature of the newer product platform ASICs and software The following table identifies the differences compared with the predecessor GM GR 47 48 products of the two major hardware variants of the GR64 The major effected signals are further described in the succeeded sections For the ...

Page 20: ...14 ON OFF Similar in behaviour Similar in behaviour 15 SIMVCC 1 8V 3 0V only 1 8V 3 0V only 16 SIMDET No change 17 SIMRST No change Internally Externally supported SIMs 18 SIMDAT No change 19 SIMCLK No change 20 DAC PWM output PWM output 21 GPIO1 22 GPIO2 23 GPIO3 Input Output impedance differs due to level shifter interfaces Logic levels are application specific 24 GPIO4 25 VRTC Interface voltage...

Page 21: ...interfaces Logic levels are application specific 40 GPIO12 41 DTM1 42 DFM1 43 DTM3 44 DFM3 45 Reserved Reserved replaces UART2 in legacy product Not available in this variant 46 Reserved 47 SSPDTM New implementation interfaces to DSP only New implementation interfaces to DSP only 48 SSPDFM 49 Reserved Not available Reserved 50 ALARM Not available New to GR64 51 SSPFS New implementation interfaces ...

Page 22: ...came obsolete some years ago Change Impact This change will not impact existing integrators 3 2 4 D to A Converter Pin GR64 GR4x Functional Difference 20 DAC DAC Software vs Hardware implementation The signal from the GR64 to the DAC output is a programmable Pulse Width Modulated PWM signal Although this is not a hardware DAC like the predecessor interface which produced a true analogue voltage ou...

Page 23: ...greement Ce document est la propriété exclusive de WAVECOM Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable 27 ADIN2 ADC2 Input resolution range 28 ADIN3 ADC3 The GR64 has a 10 bit ADC compared with its predecessor product which only offered 8 bit resolution The input voltage range is slightly narrow in the GR64 Change Impact Some additional calibration to adjust ...

Page 24: ... three UARTs in the GR4x series has been replaced by a reserved interface in the GR64 The absence of a third hardware UART encouraged this change Change Impact For users of the third UART in GR4x products some re configuration of serial interfaces may be necessary Different alternatives are available an Embedded Application for configuring GPIO like an SPI bus offers a viable serial interface 3 2 ...

Page 25: ...l role of the Service function in GR4x generation devices was that of a flashing programming accelerator where voltages as great as 12V were applied to the interface The memory technology used in GR64 does not require a higher voltage than the standard digital interface level 2 8V and will suffer damage if excessive voltage is applied To overcome the risk of damage to the Wireless CPU over voltage...

Page 26: ...tal audio interface in the GR64 is pin compatible with the predecessor products for a standard 4 wire synchronous serial interface PCM data from Wireless CPU to host PCM data from host to Wireless CPU PCM Frame Sync PCM Clock The GR64 PCM interface will function in the same sampling manner as the GR4x products which uses a 16 bit frame size 13 bit word sampled at 8ksps The GR64 PCM interface funct...

Page 27: ...lable I O pins Support services for this are available upon request Details of the multiplexed pin functions can be found in the GR64 Integrators Manual available upon request from the Wavecom M2M Customer Support 3 4 Software Compatibility Legacy users will benefit from having a GR64 product which has been developed to maintain the largest extent of functional compatibility possible with existing...

Page 28: ...ly used AT Commands and is not a complete list For an exhaustive list of all AT Commands available for the GR64 and their details please refer to the latest AT Command Manual available for download on the Wavecom Web site Function Differences in GR64 compared with GR47 48 AT Command Dial Additional characters added for dial_string ATD A B C Additional GSM Modifiers W T and P Hang up Same as GR47 G...

Page 29: ...tion Status Same as GR47 GR48 command IP Activate cid added as response to AT E2IPA Value range of cid changed from 0 10 AT E2IPA to 0 19 for a reference to a PDP context identifier previously defined with AT CGDCONT IP Socket Close SockId optional parameter added AT E2IPC IP Open Connect SockId optional parameter added AT E2IPO IP Info Same as GR47 GR48 command AT E2IPI IP Error SockId added as p...

Page 30: ...8 command Ring indicator for SMS Same as GR47 GR48 command AT E2SMSRI AT CMGF Message Format Same as GR47 GR48 command AT CMGS Send Message Same as GR47 GR48 command AT CMGD Delete Message Same as GR47 GR48 command AT CMGL List Message Same as GR47 GR48 command AT CMGR Read Message Same as GR47 GR48 command AT CNMI New Message Indications bfr added as a new parameter as follows Buffered unsolicite...

Page 31: ... of the PCB assembly allowing for two variants one with nothing on the reverse side other than the RF connector another with an integrated SIM holder GR4x GR64 Integrated SIM variant GR4x GR64 Integrated SIM variant Migration Guide This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement Ce document est la propriété exclusive de ...

Page 32: ...ble Take care in handling the GR64 Wireless CPU due to the presence of fragile components in the RF Connector side of the assembly as highlighted in the figure below Be sure that these components make no contact to any hard surface during the storage test assembly packaging shipment or life use of the GR64 Wireless CPU Making contact between the components and hard surfaces or otherwise mishandlin...

Page 33: ...ou divulgué à des tiers sans son autorisation préalable WAVECOM S A 3 esplanade du Foncet 92442 Issy les Moulineaux Cedex France Tel 33 0 1 46 29 08 00 Fax 33 0 1 46 29 08 08 Wavecom Inc 430 Davis Dr Suite 300 Research Triangle Park NC 27709 USA Tel 1 919 237 4000 Fax 1 919 237 4140 WAVECOM Asia Pacific Ltd Unit 201 207 2nd Floor Bio Informatics Centre No 2 Science Park West Avenue Hong Kong Scien...

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