KR970028941A - Clock switching device of digital processor - Google Patents
Clock switching device of digital processor Download PDFInfo
- Publication number
- KR970028941A KR970028941A KR1019950042357A KR19950042357A KR970028941A KR 970028941 A KR970028941 A KR 970028941A KR 1019950042357 A KR1019950042357 A KR 1019950042357A KR 19950042357 A KR19950042357 A KR 19950042357A KR 970028941 A KR970028941 A KR 970028941A
- Authority
- KR
- South Korea
- Prior art keywords
- address
- switching device
- clock switching
- unit
- introducing
- Prior art date
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Information Transfer Systems (AREA)
Abstract
본 발명은 마이크로프로세서의 I/O 보드 제어장치에 관한 것으로서, 특히 액세스 타이밍이 서로 다른 I/O장치를 제어하는 디지털 프로세서의 클락 스위칭 장치에 관한 것이다. I/O장치의 처리속도에 맞는 빠르기로 효율적으로 동작시키는 디지털 프로세서의 클락 스위칭 장치에 있어서, 소정의 액세스하고자하는 상기 소정의 I/O장치에 어드레스를 출력하는 어드레스생성부; 어드레스의 비트라인의 모든 레벨이 하이 상태인지를 감지하는 어드레스감지부; 상기 어드레스신호를 유입하여 디코드하는 디코더부; 상기 디코더부의 값을 유입하여 I/O장치가 데이터처리하는 소정의 기간 동안 시간을 지연하는 지연부; 상기 지연부에서 출력하는 지연신호와 디코더부 및 어드레스신호를 유입하여 상기 I/O 장치를 액세스하는 어드레스신호를 소정의 기간동안 유지시키는 게이트부; 및 상기 어드레스감지부에서 상기 I/O장치를 액세스하는 어드레스가 감지되면 상기 I/O 클락을 로우레벨로 하여 적절한 속도로 I/O 장치를 제어하는 프로세서제어부를 포함함을 특징으로 한다. 본 발명의 디지털 프로세서의 클락 스위칭 장치는 액세스되는 I/O 장치들의 처리속도에 따라 해당 I/O 장치의 속도에 맞는 I/O 제어 클락이 최적으로 조정됨으로써 시스템의 효율을 높일 수 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an I / O board controller of a microprocessor, and more particularly to a clock switching device of a digital processor for controlling I / O devices having different access timings. A clock switching device of a digital processor for efficiently operating at a high speed suitable for a processing speed of an I / O device, the clock switching device comprising: an address generator for outputting an address to the predetermined I / O device to be accessed; An address detecting unit for detecting whether all levels of the bit lines of the address are in a high state; A decoder unit for introducing and decoding the address signal; A delay unit for introducing a value of the decoder unit and delaying a time for a predetermined period during which an I / O device processes data; A gate unit for introducing a delay signal output from the delay unit, a decoder unit, and an address signal to maintain an address signal for accessing the I / O device for a predetermined period; And a processor controller configured to control the I / O device at an appropriate speed by setting the I / O clock to a low level when the address detecting unit detects an address for accessing the I / O device. The clock switching device of the digital processor of the present invention can increase the efficiency of the system by optimally adjusting the I / O control clock according to the speed of the I / O device according to the processing speed of the accessed I / O devices.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.
제1도는 본 발명을 설명하기 위한 디지털 프로세서의 클락 스위칭 장치의 개략적 블록도이다.1 is a schematic block diagram of a clock switching device of a digital processor for explaining the present invention.
제2도는 제1도에 도시된 블록도이다.2 is a block diagram shown in FIG.
제3도는 본 발명에 따른 디지털 프로세서의 클락 스위칭 장치에서 데이터 라이트 수행시의 타이밍도이다.3 is a timing diagram when data write is performed in the clock switching device of the digital processor according to the present invention.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950042357A KR0168202B1 (en) | 1995-11-20 | 1995-11-20 | Clock switching device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950042357A KR0168202B1 (en) | 1995-11-20 | 1995-11-20 | Clock switching device |
Publications (2)
Publication Number | Publication Date |
---|---|
KR970028941A true KR970028941A (en) | 1997-06-26 |
KR0168202B1 KR0168202B1 (en) | 1999-01-15 |
Family
ID=19434785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950042357A KR0168202B1 (en) | 1995-11-20 | 1995-11-20 | Clock switching device |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR0168202B1 (en) |
-
1995
- 1995-11-20 KR KR1019950042357A patent/KR0168202B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR0168202B1 (en) | 1999-01-15 |
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