JPS6431225A - Processor - Google Patents

Abstract

PURPOSE:To efficiently use an exponent part register for the processing of floating decimal point data and fixed decimal point data by obtaining the exponent part register of the same bit length as a mantissa part register. CONSTITUTION:Digital signal processing circuits 24 and 25, an analog/digital converter 23 and digital/analog converters 26 and 27 execute an arithmetic operating action, etc., based on a clock signal SCLK and a synchronizing signal SYNK from a clock generating circuit 30. Exponent part registers 33, 34, 43 and 44 have the same bit length as mantissa part registers 31, 31, 41 and 42. Accordingly, when the fixed decimal point data are transferred between the digital processing circuits 24 and 25, the exponent part registers 33, 34, 43 and 44 are used and the other fixed decimal point data of 16 bits of respective right and left channels and simultaneously transferred. Even between the digital processing circuit 25 and the digital/analog converters 26 and 27, the fixed point data of respective two channels in right and left of 16 bits of the respective channels are simultaneously transferred. Thus, the transferring of the numerous data can be executed.