JPH0250750A - Bus conversion circuit for microcomputer system - Google Patents

Bus conversion circuit for microcomputer system

Info

Publication number
JPH0250750A
JPH0250750A JP63201454A JP20145488A JPH0250750A JP H0250750 A JPH0250750 A JP H0250750A JP 63201454 A JP63201454 A JP 63201454A JP 20145488 A JP20145488 A JP 20145488A JP H0250750 A JPH0250750 A JP H0250750A
Authority
JP
Japan
Prior art keywords
circuit
cpu
bit
bus
bus conversion
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
JP63201454A
Other languages
Japanese (ja)
Inventor
Noriyuki Takagi
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 JP63201454A priority Critical patent/JPH0250750A/en
Publication of JPH0250750A publication Critical patent/JPH0250750A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To attain word access from a 16-bit CPU to an 8-bit bus channel by providing the title circuit with a bus conversion starting circuit, a machine cycle counting circuit, a weighting circuit, and an artificial cycle generating circuit.
CONSTITUTION: A bus conversion starting circuit 1 detects word access from the 16-bit CPU to an even address in the 8-bit bus channel. The machine cycle counting circuit 2 is started by the bus conversion starting circuit 1 to count up CPU clocks and the weighting circuit 3 generates a weight signal to the CPU on the basis of an output from the circuit 2. The artificial cycle generating circuit 4 artificially generates two bus cycles to the 8-bit bus channel on the basis of an output from the circuit 3. Consequently, word access from the CPU to the 8-bit bus channel can be attained.
COPYRIGHT: (C)1990,JPO&Japio
JP63201454A 1988-08-12 1988-08-12 Bus conversion circuit for microcomputer system Pending JPH0250750A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63201454A JPH0250750A (en) 1988-08-12 1988-08-12 Bus conversion circuit for microcomputer system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63201454A JPH0250750A (en) 1988-08-12 1988-08-12 Bus conversion circuit for microcomputer system

Publications (1)

Publication Number Publication Date
JPH0250750A true JPH0250750A (en) 1990-02-20

Family

ID=16441360

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63201454A Pending JPH0250750A (en) 1988-08-12 1988-08-12 Bus conversion circuit for microcomputer system

Country Status (1)

Country Link
JP (1) JPH0250750A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5506995A (en) * 1992-06-08 1996-04-09 Mitsubishi Denki Kabushiki Kaisha Bus master for selectively disconnecting/connecting a first bus to and from a second bus in response to an acquisition request

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2216797A (en) * 1938-01-06 1940-10-08 Andis Mathew Shaving device
GB624077A (en) * 1944-10-24 1949-05-27 Bedri Hussein Gostkowski Mechanical razor
US2867902A (en) * 1958-04-08 1959-01-13 Wade Tom Power driven hair clipper
JPS5427853A (en) * 1977-07-30 1979-03-02 Matsushita Electric Works Ltd Hairdressing tool
JPS63160691A (en) * 1986-12-23 1988-07-04 Matsushita Electric Works Ltd Electric razor
JPH1015258A (en) * 1996-07-03 1998-01-20 Kyushu Hitachi Maxell Ltd Electric shaver
WO2009024900A1 (en) * 2007-08-17 2009-02-26 Koninklijke Philips Electronics N.V. Hair trimming device
JP2011500234A (en) * 2007-10-22 2011-01-06 ブラウン ゲーエムベーハー Hair trimmer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2216797A (en) * 1938-01-06 1940-10-08 Andis Mathew Shaving device
GB624077A (en) * 1944-10-24 1949-05-27 Bedri Hussein Gostkowski Mechanical razor
US2867902A (en) * 1958-04-08 1959-01-13 Wade Tom Power driven hair clipper
JPS5427853A (en) * 1977-07-30 1979-03-02 Matsushita Electric Works Ltd Hairdressing tool
JPS63160691A (en) * 1986-12-23 1988-07-04 Matsushita Electric Works Ltd Electric razor
JPH1015258A (en) * 1996-07-03 1998-01-20 Kyushu Hitachi Maxell Ltd Electric shaver
WO2009024900A1 (en) * 2007-08-17 2009-02-26 Koninklijke Philips Electronics N.V. Hair trimming device
JP2011500234A (en) * 2007-10-22 2011-01-06 ブラウン ゲーエムベーハー Hair trimmer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5506995A (en) * 1992-06-08 1996-04-09 Mitsubishi Denki Kabushiki Kaisha Bus master for selectively disconnecting/connecting a first bus to and from a second bus in response to an acquisition request

Similar Documents

Publication Publication Date Title
JPS62163152A (en) Watchdog timer
JPH0387909A (en) Information processor and microprocessor
JPS62214464A (en) Coprocessor coupling system
JPS5690219A (en) Combination scale
JPH01311320A (en) Overflow correcting circuit
JPH03157030A (en) Data processor
JPH01284036A (en) Timing extracting circuit
JPH02125948A (en) Engine control device
JPS545637A (en) Communication control unit
JPH01282481A (en) Dispersion type timing signal generator
JPS58105067A (en) Display unit
JPS63229506A (en) Output system for axis speed
JPS5464941A (en) Weight generator circuit
JPH0250735A (en) Function monitoring system based upon redundancy constitution of microprocessor
JPS61118850A (en) Microprocessor
JPS6271335A (en) Analog-digital or digital-analog converter
JPS52149432A (en) Electronic device
JPS59170728A (en) Combinational metering system
JPH03111960A (en) One-chip microcomputer
JPS5295155A (en) Da converter
JPH02161690A (en) Semiconductor memory adapted so as to be controlled synchronously with continuous clock cycle and having word line and bit line
JPS53136423A (en) Network point processing system for picture signal
JPH02144652A (en) Bus arbitration system
JPS55162658A (en) Synchronizing system in push-button telephone unit
JPS5553740A (en) Velocity converting circuit between central processor and terminal unit