NFC中的主题 MFRC522 Multiple SPI

MFRC522 Multiple SPI

kita — Wed, 20 Jun 2018 00:52:58 GMT

Connect SPI communication (MISO / MOSI / SCK / SS) with the microcomputer
I would like to do multi-control,
When multiple units are connected,
Even if you select the device you want to communicate with the SS terminal,
Other If the MISO port of the device is output "Low"
If the selected MISO output level goes down and the communication
It will not be possible.

Is MFRC 522 supported only 1: 1 SPI?

Re: MFRC522 Multiple SPI

Kan_Li — Mon, 25 Jun 2018 06:41:56 GMT

Yes, MFRC522 supports only one SPI interface.

Have a great day,
Kan

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Re: MFRC522 Multiple SPI

kita — Mon, 25 Jun 2018 07:39:46 GMT

Hello,

Thank you for answering.

◆When MFRC 522 is used in 1 (Master): N (Slave)
I plan to communicate by switching the SS terminal and MISO port to the device I want to communicate with.
Is there not a problem?

※N (Slave) unit　MOSI / SCK / RST ports share.

◆Does MFRC-630 support 1 (Master): N (Slave) communication?

Best Regards,

Kan_Li