| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication processing circuit, where a problem of largely deteriorated communication rate and quality due to radio wave intensity, reflections and disturbances or the like are solved resulting from susceptibility of data communication modulating/demodulating an analog voice signal by a modem to the effect of noise in a conventional PHS. SOLUTION: A synchronization pattern detection section 1 establishes frame synchronization, a reception control section 3 transfers reception data to a register 5 according to a reception frame timing control section 2, and a reception CRC section 4 checks an error of received data. A transmission data register 6 sends transmission data via a transmission control section 8 according to a transmission frame timing control section 7 and a CRC section 9 adds an error check code to the transmission data and then high-speed digital data communication in 32 kbps by a PHS is realized. |
