Information transmission system and information transmission apparatus
AssigneeNEC Corporation
InventorSeiji Kachi
Life of this patent
Estimating the term…
Abstract
In an information transmission system, a first frequency dividing section divides a clock signal by 2X, where X is information to be transmitted, and a second frequency dividing section divides an inverted clock by 2Y, where Y is information to be transmitted. The exclusive-OR of the outputs of the first and second frequency dividing sections is output to a frequency divisor detection section, which measures the time interval between changes thereof at the rising edge of the clock and the falling edge of the clock, thereby reading the set values of the first and second frequency dividing sections via a data signal line.
Claims12
An information transmission system comprising:
- an information transmission section;
- and
- an information receiving section;
- whereby information can be serially transmitted from said information transmission section to said information receiving section;
- said system further comprising;
- a single clock signal line connecting said information transmission section and said information receiving section;
- a clock generating section for generating a clock signal sent to said clock signal line;
- a first frequency dividing section for dividing said clock signal supplied from said clock generation section by a value formed by multiplying said information to be transmitted from said information transmission section to said information receiving section, by even-number;
- a second frequency dividing section for dividing an inverted clock derived from said clock signal by a value formed by multiplying said information to be transmitted from said information transmission section to said information receiving section, by even-number;
- a synthesizing section for synthesizing an XOR signal from the output signals from said first and second frequency dividing sections;
- and
- a frequency divisor detection section, disposed in said information receiving section, whereby the time interval formed between successive periods at which a level of said output signal output from said signal synthesizing section is changed at the rising edge of the clock signal, is measured, thereby detecting the value set in the first frequency dividing section, and the time interval formed between successive periods at which a level of said output signal output from said signal synthesizing section is changed at the falling edge of the clock signal, is measured, thereby detecting the value set in the second frequency dividing section.
An information transmission apparatus which is used for transmitting information from an information transmission section and an information receiving section;
- said apparatus comprising:
- an information transmission section;
- an information receiving section;
- a single clock signal line connecting said information transmission section and said information receiving section;
- and
- a clock generating section for generating a clock signal sent to said clock signal line, and wherein said information transmission section being further provided with;
- a first frequency dividing section for dividing said clock signal supplied from said clock generation section by a value formed by multiplying said information to be transmitted from said information transmission section to said information receiving section, by even-number;
- a second frequency dividing section for dividing an inverted clock derived from said clock signal by a value formed by multiplying said information to be transmitted from said information transmission section to said information receiving section, by even-number;
- a synthesizing section for synthesizing an XOR signal from the output signals from said first and second frequency dividing sections;
- and wherein said information receiving section being further provided with;
- a frequency divisor detection section, whereby the time interval formed between successive periods at which a level of said output signal output from said signal synthesizing section is changed at the rising edge of the clock signal, is measured, thereby detecting the value set in the first frequency dividing section, and the time interval formed between successive periods at which a level of said output signal output from said signal synthesizing section is changed at the falling edge of the clock signal, is measured, thereby detecting the value set in the second frequency dividing section.
Dependencies are inferred from the claim text.