公开(公告)号：DE3380042D1

公开(公告)日：1989-07-13

申请号：DE3380042

申请日：1983-12-15

Applicant: IBM

Inventor： TAJIMA SATOSHI ,  WATANABE SHINPEI ,  SUZUKI TOSHIO ,  YANAGI TSUTOMU ,  YONEMOCHI KENSHIN

IPC: G06F3/023 ,  G06F11/00 ,  H03M11/20

公开(公告)号：JPS59123336A

公开(公告)日：1984-07-17

申请号：JP22784682

申请日：1982-12-28

Applicant: Ibm

Inventor： TAJIMA SATOSHI ,  WATANABE SHINPEI

IPC: G06F3/02 ,  G06F3/023 ,  G06F11/00 ,  G06F11/14 ,  H04L7/00 ,  H04L7/04

CPC classification number: G06F11/076 ,  G06F3/023 ,  G06F11/14

公开(公告)号：CA1205205A

公开(公告)日：1986-05-27

申请号：CA439560

申请日：1983-10-24

Applicant: IBM

Inventor： TAJIMA SATOSHI ,  WATANABE SHINPEI

IPC: G06F3/02 ,  G06F3/023 ,  G06F11/00 ,  G06F11/14 ,  H04L7/00 ,  H04L7/04 ,  G06F3/03

Abstract: SERIAL KEYBOARD INTERFACE SYSTEM In data processing systems it has been proposed that a keyboard and a data processing unit be interconnected through a data line and a clock line so as to transmit keyboard outcodes bit-serially through the data line and to transmit a keyboard out clock signal through the clock line. This could result in false operation however due to noise being induced in the interconnecting cables from both the data and clock lines resulting in false operation and incorrect data being transmitted. The present invention which provides a serial keyboard interface system overcomes the problem of erroneous transmission of keyboard data due to noise pulses induced in the interconnecting lines. Data signals are generated at the data processing unit indicating whether the correct number of bits of a data frame are counted for the received signal. If incorrect number is received then the status signal which is returned to the keyboard causes a retransmission of the signal.

公开(公告)号：HK18690A

公开(公告)日：1990-03-16

申请号：HK18690

申请日：1990-03-08

Applicant: IBM

Inventor： TAJIMA SATOSHI ,  WATANABE SHINPEI ,  SUZUKI TOSHIO ,  YANAGI TSUTOMU ,  YONEMOCHI KENSHIN

IPC: G06F3/023 ,  G06F11/00 ,  H03M11/20