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PN5180 BUSY line still LOW

Question asked by Li Ke on Jul 8, 2020
Latest reply on Jul 10, 2020 by Kan_Li

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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