JPS54148471A - Preset counter - Google Patents

Preset counter

Info

Publication number
JPS54148471A
JPS54148471A JP5659078A JP5659078A JPS54148471A JP S54148471 A JPS54148471 A JP S54148471A JP 5659078 A JP5659078 A JP 5659078A JP 5659078 A JP5659078 A JP 5659078A JP S54148471 A JPS54148471 A JP S54148471A
Authority
JP
Japan
Prior art keywords
count
central processor
counter
register
sent
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
JP5659078A
Other languages
Japanese (ja)
Inventor
Takashi Kano
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP5659078A priority Critical patent/JPS54148471A/en
Publication of JPS54148471A publication Critical patent/JPS54148471A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
    • H03K23/64—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two
    • H03K23/66—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a variable counting base, e.g. by presetting or by adding or suppressing pulses

Landscapes

  • Debugging And Monitoring (AREA)

Abstract

PURPOSE:To secure the count value setting, the counting command and the count- up detection for the counter through the program even with the central processor which has no numerical operation function by adding the 1-bit data transfer function to the central processor. CONSTITUTION:The count set value is sent out by one bit and in the form of the output data from the central processor via line l1 and then made to correspond to the address signals obtained through line l3 to be written in sequence into LR1- LR16 of ratch register 9 selected at selector circuit 11. Then the counting command ''1'' sent from l1 is written into LR17 of register 9, and this output releases the reset of counter 2 and count-up memory circuit 5. At the same time, the input pulse sent from the processor is applied to counter 2 via level changer 1. After this, the count value is compared with the set value of LR1-LR16 of register 9 through coincidence detector 3, and memory circuit 5 is set when a coincidence is obtained in the comparison. Thus, the fact of count-up is read at all times through the central processor.
JP5659078A 1978-05-15 1978-05-15 Preset counter Pending JPS54148471A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5659078A JPS54148471A (en) 1978-05-15 1978-05-15 Preset counter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5659078A JPS54148471A (en) 1978-05-15 1978-05-15 Preset counter

Publications (1)

Publication Number Publication Date
JPS54148471A true JPS54148471A (en) 1979-11-20

Family

ID=13031394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5659078A Pending JPS54148471A (en) 1978-05-15 1978-05-15 Preset counter

Country Status (1)

Country Link
JP (1) JPS54148471A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57106239A (en) * 1980-12-24 1982-07-02 Canon Inc Oscillating circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57106239A (en) * 1980-12-24 1982-07-02 Canon Inc Oscillating circuit

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