JPS55160864A - System for identifying package of optional device - Google Patents
System for identifying package of optional deviceInfo
- 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
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
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) |
-
1979
- 1979-06-04 JP JP6970579A patent/JPS55160864A/en active Pending
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