PN532 - Pre-Jumpers, Resistor between sel0 sel1?

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heoun
 
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PN532 - Pre-Jumpers, Resistor between sel0 sel1?

Post by heoun »

have an early PN532, the one on the manuals title page. However, the manual doesn't seem to reference it. I remember something about having a resistor between sel0 and sel1 to select SPI, but cannot be sure.

If anyone knows, that would be very helpful.

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dastels
 
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Re: PN532 - Pre-Jumpers, Resistor between sel0 sel1?

Post by dastels »

It sounds like you have the shield version rather than the breakout version?

From what I read & see, on the shield you would short the SEL0 and SEL1 jumper pairs to select SPI mode. See the photo https://cdn-learn.adafruit.com/assets/a ... 1396815638 which shows instruction as part of the silk screen.

All I see about adding resistors is on the breakout in I2C mode, since the breakout apparently doesn't have SDA/SLC pullups.

Dave

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