JPS55160864A - System for identifying package of optional device - Google Patents

System for identifying package of optional device

Info

Publication number
JPS55160864A
JPS55160864A JP6970579A JP6970579A JPS55160864A JP S55160864 A JPS55160864 A JP S55160864A JP 6970579 A JP6970579 A JP 6970579A JP 6970579 A JP6970579 A JP 6970579A JP S55160864 A JPS55160864 A JP S55160864A
Authority
JP
Japan
Prior art keywords
signal
bpa
optional device
circuit board
printed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6970579A
Other languages
Japanese (ja)
Inventor
Masahiro Kawakatsu
Shigeyuki Morioka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP6970579A priority Critical patent/JPS55160864A/en
Publication of JPS55160864A publication Critical patent/JPS55160864A/en
Pending legal-status Critical Current

Links

Landscapes

  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

PURPOSE: To easily recognize whether the optional device is incorporated by identifying the presence and absence of the package of the optional device according to an identification signal that has responded to the presence and absence of an earth signal.
CONSTITUTION: When a printed-circuit board 21 for the option is packaged, the earth signal from an earth signal generator circuit 23 is fed to an optional device package identification signal generator circuit 22 in a basic printed-circuit board 20, the BPA signal is made "1" and the *BPA signal is done "0". On the other hand, when the printed-circuit board 21 for the option is not packaged, a power supply Vcc 25 operates through a resistance 24, the *BPA signal is made "1" and the BPA signal is made "1" and the BPA signal is done "0".
COPYRIGHT: (C)1980,JPO&Japio
JP6970579A 1979-06-04 1979-06-04 System for identifying package of optional device Pending JPS55160864A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6970579A JPS55160864A (en) 1979-06-04 1979-06-04 System for identifying package of optional device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6970579A JPS55160864A (en) 1979-06-04 1979-06-04 System for identifying package of optional device

Publications (1)

Publication Number Publication Date
JPS55160864A true JPS55160864A (en) 1980-12-15

Family

ID=13410518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6970579A Pending JPS55160864A (en) 1979-06-04 1979-06-04 System for identifying package of optional device

Country Status (1)

Country Link
JP (1) JPS55160864A (en)

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