Browse Prior Art Database

Serial Interface for Operator Panel

IP.com Disclosure Number: IPCOM000034778D
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 3 page(s) / 77K

Publishing Venue

IBM

Related People

Heybruck, WF: AUTHOR [+2]

Abstract

A unique 6-wire serial interface for an operator panel provides the same degree of control to the operator as a known 20-wire parallel interface. The present embodiment is more economical and space efficient as the number of ferrites, required on each wire of the interface cable, for RFI suppression, is reduced from 20 to 6. (Image Omitted) Fig. 1 shows the Operator Panel which includes a sixteen-key Keyboard 1, a three-digit Display 2, and a LED (light-emitting diode) indicator 3. Also included is an alarm (not shown). Referring to Fig. 2 it is seen that the Interface cable of the present embodiment connects the Operator Panel to the Control Logic of the parent machine and consists of six lines: Serial Input Line 4, Serial Output Line 5, Strobe line 6, Clock line 7, Power line 8 and Ground line 10.

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Serial Interface for Operator Panel

A unique 6-wire serial interface for an operator panel provides the same degree of control to the operator as a known 20-wire parallel interface. The present embodiment is more economical and space efficient as the number of ferrites, required on each wire of the interface cable, for RFI suppression, is reduced from 20 to 6.

(Image Omitted)

Fig. 1 shows the Operator Panel which includes a sixteen-key Keyboard 1, a three-digit Display 2, and a LED (light-emitting diode) indicator 3. Also included is an alarm (not shown). Referring to Fig. 2 it is seen that the Interface cable of the present embodiment connects the Operator Panel to the Control Logic of the parent machine and consists of six lines: Serial Input Line 4, Serial Output Line 5, Strobe line 6, Clock line 7, Power line 8 and Ground line 10. It is also seen that Keyboard 1 inputs to parallel in/ serial out Shift Register 11, and that Display 2 receives input from serial in/parallel out Shift Register 12. Referring to Figs. 2 and 3, it is seen that the Interface operates as follows. After data has been entered into Keyboard 1, Strobe line 6 is activated and deactivated (13), which latches the present status of all the keys into Keyboard Shift Register 11, and places (14) the present status of key "1" on Serial Input Line (S.I.L.) 4 where it is read by the Control Logic. The Control Logic then places the first Control Bit 15, on Serial Output Line (S.O.L) 5 and, Clock Lin...