发明名称 |
Serial port having only a single terminal for information transfer to and from an integrated circuit |
摘要 |
A host adapter integrated circuit that contains data transfer modules has a serial port that uses a single serial port pin to communicate with a slave serial port input-output integrated circuit that interfaces to various resources that are included in a support circuit. The serial port forms a packet from each byte of information to be transferred from a module to the slave device by adding a start bit before the byte, followed by a parity bit at the end of the byte and followed by a stop bit. After transmitting the packet, the serial port waits for an acknowledge packet from the slave serial port input-output integrated circuit, for example for two clock cycles after transmission of the packet. For synchronous operation, a common oscillator drives the clock signal on the slave serial port input-output integrated circuit and host adapter integrated circuit. The serial port pin in the host adapter integrated circuit is connected to a shifter circuit in the serial port that serially clocks data from the serial port pin and passes the data parallelly to a bus in the host adapter integrated circuit and vice versa.
|
申请公布号 |
US5920708(A) |
申请公布日期 |
1999.07.06 |
申请号 |
US19960592800 |
申请日期 |
1996.01.26 |
申请人 |
ADAPTEC, INC. |
发明人 |
GATES, STILLMAN F.;BURNS, CHRISTOPHER |
分类号 |
G06F13/38;G06F13/42;(IPC1-7):G06F13/00 |
主分类号 |
G06F13/38 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|