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Doubt while interfacing with HDC1000 Temperature & humidity sensor

After I have configured the HDC1000 in both temp & Humidity conversion mode[Writing 0x1000 in to configuration register(address:0x02)],

1)I am getting 0xFFFC as same value for both temp & Humidity when I am following the below sequence start,address+w,00(pointer register), stop command, wait for DRDYn to be low , start, address+Read.

2)I am not getting the signal DRDYn  asserted if stop command is not given after start,address+w,00(pointer register). 

Kindly suggest whether stop command need to be given after the Trigger of start temperature & humidity conversion[by attempting writing 0X00 in Pointer register] before giving the read command of both Temperature & Humidity at a time.

Awaiting for your reply soon.

Regards,

N.vamsi.

R&D Firmware Engineer,

Email:temc@Efftronics.com.

PH:9391586531.