PN5180 BUSY line still LOW

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PN5180 BUSY line still LOW

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LiKe
Contributor I

Dear Sir

I test the PN5180 reader IC, I have a question, the PN5180 busy line still to LOW. 

The PN5180 write Timer0_reload register data can not BUSY line change to High.

I read the Timer0_reload register 

SPI_CS=0;

(void)SPI_send(0x04);

(void)SPI_send(TIMER0_RELOAD);

SPI_CS=1;

delay_ms(100);

SPI_CS=0;

result[0]=SPI_send(0x00);

result[1]=SPI_send(0x00);

result[2]=SPI_send(0x00);

result[3]=SPI_send(0x00);

SPI_CS=1;

the result is right.

I trace the BUSY line by Oscilloscope, the BUSY line to LOW level

but I trace the PN5180 DEMO KIT. The BUSY line can from LOW to High.

Where is the problem? 

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Kan_Li
NXP TechSupport
NXP TechSupport

Hi Li Ke,

Looks like you toggle the CS line during data exchange. Please kindly refer to the following for details.

pastedImage_1.png

Hope that helps,

Have a great day,
Kan


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