JPS647537A - Custom lsi - Google Patents

Custom lsi

Info

Publication number
JPS647537A
JPS647537A JP16374787A JP16374787A JPS647537A JP S647537 A JPS647537 A JP S647537A JP 16374787 A JP16374787 A JP 16374787A JP 16374787 A JP16374787 A JP 16374787A JP S647537 A JPS647537 A JP S647537A
Authority
JP
Japan
Prior art keywords
rom
address
data
signal
code name
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
JP16374787A
Other languages
Japanese (ja)
Inventor
Masahiro Nakamura
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP16374787A priority Critical patent/JPS647537A/en
Publication of JPS647537A publication Critical patent/JPS647537A/en
Pending legal-status Critical Current

Links

Landscapes

  • Semiconductor Integrated Circuits (AREA)
  • Design And Manufacture Of Integrated Circuits (AREA)

Abstract

PURPOSE:To make it possible to confirm the kind of each functional block of on-chip after resin sealing by a method wherein a code name to correspond to each functional block constituting of a custom LSI is stored in a ROM and the data of the code name is read out outside. CONSTITUTION:An address signal is inputted in an internal address bus 5 from the exterior through an input port 1 in a state that a test signal (a) is active. The test signal is a test mode signal for reading out outside code names stored in a ROM 4 as data and a ROM address decoder 3 decodes addresses on the address bus and selects the address of the ROM 4. The ROM 4 outputs outside the code name stored in the selected address as data through an internal data bus 6 and an output port 2. That is, when the test signal is active, ROM data to correspond to the address signal inputted from the exterior is outputted. Thereby, an on-chip mega cell can be confirmed, even in a product subsequent to resin sealing.
JP16374787A 1987-06-29 1987-06-29 Custom lsi Pending JPS647537A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16374787A JPS647537A (en) 1987-06-29 1987-06-29 Custom lsi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16374787A JPS647537A (en) 1987-06-29 1987-06-29 Custom lsi

Publications (1)

Publication Number Publication Date
JPS647537A true JPS647537A (en) 1989-01-11

Family

ID=15779920

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16374787A Pending JPS647537A (en) 1987-06-29 1987-06-29 Custom lsi

Country Status (1)

Country Link
JP (1) JPS647537A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04303961A (en) * 1991-04-01 1992-10-27 Nec Ic Microcomput Syst Ltd Semiconductor integrated circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04303961A (en) * 1991-04-01 1992-10-27 Nec Ic Microcomput Syst Ltd Semiconductor integrated circuit

Similar Documents

Publication Publication Date Title
KR870003430A (en) Semiconductor integrated circuit device
KR910015999A (en) Semiconductor memory device
JPS55131870A (en) Data storing method of electronic dictionary
JPS647537A (en) Custom lsi
KR840001410A (en) Programmable Logic Units
KR840002780A (en) Pages Receiver
JPS5513426A (en) Checking system for data bus
JPS57111669A (en) Output system for conjugation form of word
JPS57153373A (en) Electronic interpreter
JPS55102046A (en) Logic circuit
JPS5647979A (en) Decoding system
JPS57174750A (en) Data processor
JPS6431253A (en) Data transferring system
JPS5637892A (en) Memory unit
JPS5622292A (en) Memory element
SU1091164A1 (en) Device for serial separating of ones from binary code
JPS56143581A (en) Memory circuit with bcd decoder
JPS55150027A (en) Digital signal processing system
JPS5683896A (en) Memory circuit
KR890003180A (en) How to check card type and port of exchange
MY125276A (en) A method and a system to ensure that modules to be connected to an electronic apparatus are of specific type, and a module as well as a storage medium therefor
JPS6479673A (en) Test system for ram contained lsi chip
JPS6428747A (en) Microprocessor
JPS57164493A (en) Read-only memory integrated circuit
JPS6450125A (en) Stack storage device