| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication terminal capable of rewriting a firmware without influencing original communication. SOLUTION: The communication terminal has a PDC radio part 101 for transmitting and receiving a radio signal of PDC method, a PDC channel codec part 103 for demodulation complying with the PDC method, an audio codec part 105 for decoding the signal demodulated by the PDC channel codec part 103 and coding sound input from a microphone which is one of man-machine interface parts 107, a first program storing part 109 for storing a program of a core part of the firmware which can not be rewritten, a second program storing part 111 for storing a program of which firmware may be rewritten, a short range radio part 113 for transmitting and receiving the radio signal in a communication method complying with Bluetooth (R) standard, a short range radio channel codec part 115 for demodulating in compliance with the Bluetooth (R) standard and a CPU 117 for controlling respective structuring elements. COPYRIGHT: (C)2004,JPO&NCIPI
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