| 摘要 |
<p>PURPOSE: To provide a highly versatile terminal processor by providing a pair of input/output terminals for transmitting and receiving data and plural terminals connected in parallel to a shift register and switching the input/output directions of the plural terminals. CONSTITUTION: This element is provided with a pair of the input/output terminals 64 and 66 for transmitting and receiving the data and the plural terminals 71-84 connected in parallel to the shift register 104. Terminal pins 85 and 86 are added for the input of mode selection signals and an abnormality detection circuit 305 monitors reception signals RXD inputted through the pin 64. For selection by mode selection input, when mode selection is set to 1, 1 at an address 0 for instance, the CIM is operated in an AD mode, both input number and output number become 5 for an I/O buffer 105 and an automatic transmission function is not imparted. Thus, just by adding only two pins 85 and 86, the selection of many functions is made possible and the CIM provided with the multiple functions is easily made into an LSI.</p> |
