JPS56152060A - Semiconductor device - Google Patents

Semiconductor device

Info

Publication number
JPS56152060A
JPS56152060A JP5605580A JP5605580A JPS56152060A JP S56152060 A JPS56152060 A JP S56152060A JP 5605580 A JP5605580 A JP 5605580A JP 5605580 A JP5605580 A JP 5605580A JP S56152060 A JPS56152060 A JP S56152060A
Authority
JP
Japan
Prior art keywords
mode
external memory
data
opened
semiconductor device
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
JP5605580A
Other languages
Japanese (ja)
Inventor
Kunihiro Yamada
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP5605580A priority Critical patent/JPS56152060A/en
Publication of JPS56152060A publication Critical patent/JPS56152060A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/06—Addressing a physical block of locations, e.g. base addressing, module addressing, memory dedication
    • G06F12/0615—Address space extension
    • G06F12/0623—Address space extension for memory modules

Abstract

PURPOSE:To develop a semiconductor device with only one kind of design by equipping ROM in the same chip and by providing in the chip a circuit capable of selecting either ROM or an external memory for use. CONSTITUTION:A semiconductor device which includes ROM2 in its chip is provided with mode selection part 11 capable of setting selectively the 1st functional mode in which ROM2 is used for data processing and the 2nd functional mode in which an external memory is used. When selection part 11 selects mode I, gates 16 and 17 are opened in time-division mode and data are transferred, as shown in the table, between input data holding part 9 and output data holding part 10, and the outside. When selection part 11 selects mode II, on the other hand, the external memory is connected to time-division input-output terminal part 8 and gate 13 is opened in time-division mode to supply an address, generated at memory address part 1, to the external memory via terminal part 8; and data read out of the external memory enters data acceptance part 3 via gate 15 opened at the next timing.
JP5605580A 1980-04-26 1980-04-26 Semiconductor device Pending JPS56152060A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5605580A JPS56152060A (en) 1980-04-26 1980-04-26 Semiconductor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5605580A JPS56152060A (en) 1980-04-26 1980-04-26 Semiconductor device

Publications (1)

Publication Number Publication Date
JPS56152060A true JPS56152060A (en) 1981-11-25

Family

ID=13016391

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5605580A Pending JPS56152060A (en) 1980-04-26 1980-04-26 Semiconductor device

Country Status (1)

Country Link
JP (1) JPS56152060A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5943064U (en) * 1982-09-14 1984-03-21 スタンレー電気株式会社 Mounting structure of the cap

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5943064U (en) * 1982-09-14 1984-03-21 スタンレー電気株式会社 Mounting structure of the cap

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