Only For Training And Service Purposes - LG KG270 Service Manual

Hide thumbs Also See for KG270:

Service manual (125 pages)

User manual (69 pages)

Manual (113 pages)

Table Of Contents

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

Table of Contents

The security features use the following mechanism:

• Boot ROM flow:

- Controls the boot transition to external flash

- Controls the flash update

• Flash tied to the individual chip via an ID using e-fuses, that is, each E-GOLDvoice chip has its

own fused ID.

Further details on the E-GOLDvoice security concept are not publicly documented.

3.1.16 Asynchronous Operation Mode Concept

The E-GOLDvoice can operate in either:

• The traditional synchronous mode with the 26MHz system clock synchronized on the base station

• A special asynchronous mode (XO concept).

In the asynchronous mode the 26MHz clock input is not synchronized with the base station; the

residual frequency offset is compensated in the digital signal processing domain. This processing

includes frequency and timing compensation of the baseband and voiceband signals.