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osama3
Joined: 02 Mar 2007
Posts: 2
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 02 Mar 2007 21:02 Circuit diagram |
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http://images.elektroda.net/79_1172865539.JPG
img src="http://images.elektroda.net/79_1172865539.JPG"
Kindly Explain this schematic i try but i cant understand fully .Especially the Arrow head Eoc2 Eoc ,sqw what does it's mean .
Thanks
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Pld4me
Joined: 11 Dec 2006
Posts: 17
Helped: 1
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| 03 Mar 2007 18:53 Re: Circuit diagram |
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This is a very simple microcontroller circuit with an ADC (analog to digital converter), an RTC (Real time clock IC), an RS232 IC for serial communication and it looks like there is an LCD interface.
The "Arrows" that you see are called "Off-page connectors". There are electrically tied together. They are used for schematic clarity. Otherwise, most schematics would look like a plate of spaghetti.
For example: EOC (end of coversion) coming from the ADC is electrically tied to the 10K series resistor connected to the base of the NPN transistor. When the schematic goes to the PCB layout engineer, these two points will be tied together.
Hope this helps,
Pld4me
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osama3
Joined: 02 Mar 2007
Posts: 2
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| 03 Mar 2007 21:32 Re: Circuit diagram |
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| Thanks.another thing which i would like to ask what is the purpose of Eoc sqw and Eoc ?
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Pld4me
Joined: 11 Dec 2006
Posts: 17
Helped: 1
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| 03 Mar 2007 22:35 Re: Circuit diagram |
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EOC (End of conversion) means the ADC has processed the analog input and is ready to supply the microcontroller with the digital data.
The SQW bit enables the oscillator output.
Regards,
Pld4me
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