JPS55157048A - Address output circuit - Google Patents

Address output circuit

Info

Publication number
JPS55157048A
JPS55157048A JP6539479A JP6539479A JPS55157048A JP S55157048 A JPS55157048 A JP S55157048A JP 6539479 A JP6539479 A JP 6539479A JP 6539479 A JP6539479 A JP 6539479A JP S55157048 A JPS55157048 A JP S55157048A
Authority
JP
Japan
Prior art keywords
bits
address
output
bus
same
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
JP6539479A
Other languages
Japanese (ja)
Inventor
Etsuo Kusumoto
Teiji Nishizawa
Hiroshi Izumi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6539479A priority Critical patent/JPS55157048A/en
Publication of JPS55157048A publication Critical patent/JPS55157048A/en
Pending legal-status Critical Current

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  • Executing Machine-Instructions (AREA)
  • Microcomputers (AREA)

Abstract

PURPOSE: To enable efficient accessing, by outputting only the lower rank bit group if the uupper rank bit group is the same, by outputting the address from the same address terminal in time sharing after splitting it into the lower n bits and upper i bits.
CONSTITUTION: The address is divided into i bits (AD1) and n bits (AD2) and output externally. If there is the address of (n+i) bits in the internal address B1, the part AD1 enters the bus B2 (i bits) and inputs to the comparator 1. On the other hand, the part Ad1 is already written in for the address accessed before the first preceding in the register 2 and this is always input to the bus B3 (i bits) and compared 1. That is, the part AD1 of the address newly to be accessed and the part AD1 old which is output from the register 2 to the bus 3B are compared 1, and if not in agreement, the signal C1 is ON, but if in agreement, C1 remains OFF. That is, if the part AD1 is the same as the first preceding AD1, the part AD2 only is output and AD2 is not output, allowing to increase the access efficiency.
COPYRIGHT: (C)1980,JPO&Japio
JP6539479A 1979-05-25 1979-05-25 Address output circuit Pending JPS55157048A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6539479A JPS55157048A (en) 1979-05-25 1979-05-25 Address output circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6539479A JPS55157048A (en) 1979-05-25 1979-05-25 Address output circuit

Publications (1)

Publication Number Publication Date
JPS55157048A true JPS55157048A (en) 1980-12-06

Family

ID=13285738

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6539479A Pending JPS55157048A (en) 1979-05-25 1979-05-25 Address output circuit

Country Status (1)

Country Link
JP (1) JPS55157048A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5774861U (en) * 1980-10-28 1982-05-08
JPS61216067A (en) * 1985-02-18 1986-09-25 Fujitsu Ltd Address coding system
JPS62128351A (en) * 1985-11-29 1987-06-10 Yokogawa Medical Syst Ltd Data transfer equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50115941A (en) * 1974-02-25 1975-09-10
JPS50125646A (en) * 1974-03-20 1975-10-02
JPS5274240A (en) * 1975-12-18 1977-06-22 Hitachi Ltd Lsi data processing system
JPS54119848A (en) * 1978-03-09 1979-09-18 Fujitsu Ltd Sectioning and informing system for address information

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50115941A (en) * 1974-02-25 1975-09-10
JPS50125646A (en) * 1974-03-20 1975-10-02
JPS5274240A (en) * 1975-12-18 1977-06-22 Hitachi Ltd Lsi data processing system
JPS54119848A (en) * 1978-03-09 1979-09-18 Fujitsu Ltd Sectioning and informing system for address information

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5774861U (en) * 1980-10-28 1982-05-08
JPS624043Y2 (en) * 1980-10-28 1987-01-29
JPS61216067A (en) * 1985-02-18 1986-09-25 Fujitsu Ltd Address coding system
JPS62128351A (en) * 1985-11-29 1987-06-10 Yokogawa Medical Syst Ltd Data transfer equipment

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