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Ttelmah
Joined: 11 Mar 2010
Posts: 19231
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 Posted: Sun Dec 08, 2019 9:58 am |
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| Still the same pin. That is hardware defined. |
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camerart
Joined: 24 Nov 2019
Posts: 7
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| Posted: Sun Dec 08, 2019 10:12 am |
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| Ttelmah wrote: | Are you absolutely sure you are connecting to the right pin?.
MISO, should be going to pin 23 on the 4620. |
Hi T,
I have the MISO connected to PIN 42 of the 18LF4620.
C. |
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temtronic
Joined: 01 Jul 2010
Posts: 9116
Location: Greensville,Ontario
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| Posted: Sun Dec 08, 2019 10:29 am |
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If you still have a 1K resistor in series between the compass and PIC, you've got a voltage divider when the compass goes low.......
Jay |
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camerart
Joined: 24 Nov 2019
Posts: 7
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| Posted: Sun Dec 08, 2019 10:36 am |
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| temtronic wrote: | If you still have a 1K resistor in series between the compass and PIC, you've got a voltage divider when the compass goes low.......
Jay |
Hi J,
I added the 1K resistor in series, as I kept getting faulty COMPASS modules, suspecting that the pull-down of the MISO PIN was 'breaking' them.
C |
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temtronic
Joined: 01 Jul 2010
Posts: 9116
Location: Greensville,Ontario
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| Posted: Sun Dec 08, 2019 10:47 am |
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from an AK8963C datasheet...
Operating supply voltage:
• Analog power supply +2.4V to +3.6V
• Digital Interface supply +1.65V to analog power supply voltage.
... no 'typical schematic' though'
Sure looks like that device is a 2 volt (1.65) unit so it'd be nice to know if you have a chip or a module. If a module, please supply link to mfr website |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19231
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| Posted: Sun Dec 08, 2019 12:14 pm |
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So you are using a QFN package.
What have you got Vid connected to?.
This defines the logic input voltage. It is allowed to be 1.65v min up to
Vdd max.
How is the circuit supplied?. Note that the compass _requires_ the
power supply to rise in less than 50mSec. |
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