mb_2069
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mb_2069 [2017/09/20 10:16] antichambre [Choices made during prototyping] |
mb_2069 [2017/09/20 10:25] antichambre [Choices made during prototyping] |
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| ==== Precious information found about the 2069 once prototyped ==== | ==== Precious information found about the 2069 once prototyped ==== | ||
| - | <WRAP center round info 60%> | + | <wrap info>The Absolute Rating Voltage is +/-5V, tried and fried ;)</wrap>\\ |
| - | The Absolute Rating Voltage is +/-5V, tried and fried ;)\\ | + | <wrap info>CV inputs are in a 0 to 5V range.</wrap>\\ |
| - | </WRAP> | + | <wrap info>All audio inputs are bipolar and support OverVoltage. A good hard clipping.</wrap>\\ |
| - | <WRAP center round info 60%> | + | <wrap info>The SIG1 and SIG2 has inverted signal audio inputs.</wrap>\\ |
| - | CV inputs are in a 0 to 5V range.\\ | + | |
| - | </WRAP> | + | |
| - | <WRAP center round info 60%> | + | |
| - | All audio inputs are bipolar and support OverVoltage. A good hard clipping.\\ | + | |
| - | </WRAP> | + | |
| - | <WRAP center round info 60%> | + | |
| - | The SIG1 and SIG2 has inverted signal audio inputs. | + | |
| - | </WRAP> | + | |
| <WRAP clear></WRAP> | <WRAP clear></WRAP> | ||
| It seems all VCA cells invert the signal, then same thing for the VCA part.\\ | It seems all VCA cells invert the signal, then same thing for the VCA part.\\ | ||
| Line 117: | Line 109: | ||
| </WRAP> | </WRAP> | ||
| </WRAP> | </WRAP> | ||
| - | <WRAP center round info 60%> | + | <wrap info>LOG CV Input for cut-off Frequency is inverted input.</wrap>\\ |
| - | LOG CV Input for cut-off Frequency is inverted input.\\ | + | |
| - | </WRAP> | + | |
| Lowest frequency is at 5V, Highest at 0V.\\ | Lowest frequency is at 5V, Highest at 0V.\\ | ||
| This CV needs to be inverted too.\\ | This CV needs to be inverted too.\\ | ||
| \\ | \\ | ||
| \\ | \\ | ||
| - | <WRAP center round info 60%> | + | <wrap info>LOG CV Input of the VCA seems unusable.</wrap>\\ |
| - | LOG CV Input of the VCA seems unusable.\\ | + | |
| - | </WRAP> | + | |
| I've got only some NJM2069**BD** for spare then I used the **D** version present in my EX-800 to test Log CV of the VCA in the 2 versions, and it appears to be definitively not usable for both!\\ | I've got only some NJM2069**BD** for spare then I used the **D** version present in my EX-800 to test Log CV of the VCA in the 2 versions, and it appears to be definitively not usable for both!\\ | ||
| Maybe some other version (AD, DA...) of the chip release this function. I don't know.\\ | Maybe some other version (AD, DA...) of the chip release this function. I don't know.\\ | ||
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| * 1 logic line for 2P/4P switching, 4P at Low, 2P at High. | * 1 logic line for 2P/4P switching, 4P at Low, 2P at High. | ||
| * 2 logic lines to code the 4 Configuration Modes. | * 2 logic lines to code the 4 Configuration Modes. | ||
| - | <WRAP tip>Obviously you're not obliged to use this switching circuit. All I/O are individually accessible on pin header.\\ | + | <wrap tip>Obviously you're not obliged to use this switching circuit. All I/O are individually accessible on pin header.\\ |
| You can use it to access I/O or to set it in the static configuration of your choice. | You can use it to access I/O or to set it in the static configuration of your choice. | ||
| - | </WRAP> | + | </wrap> |
| To be continued... | To be continued... | ||
mb_2069.txt · Last modified: 2017/11/08 12:10 by antichambre
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