| 摘要 |
<p>A multi-standard communication adapter (MSRA) for interfacing a low speed communication device (TP), e.g. a user station, and a high speed communication device (NP), e.g. an Integrated Services Digital Network (ISDN). Both these communication devices are allowed to transmit signals having electrical and functional interface characteristics which may be chosen amongst a wide variety of possible electrical and functional interface characteristics. The communication adapter is integrated in an electronic chip and is able to perform the different rate adaptation schemes owing to its programmable constituent parts (TXFR, TXUS, RXUS, RXFR, BUSA, BAUDA). The programmation of the communication adapter is realized by means of a host microprocessor external (PP) to the chip and which may also be used to temporarily store data transmitted between the two communication devices as well as to transmit information to or receive information from these devices. The communication adapter further includes a Baudrate generator (BAUDA) to control the clock signal on the low speed side (TP) and means to perform a self-test.</p> |
