Hi Everyone,
I am using EV-IAM-20380HT board to evaluate IAM-20380 Gyroscope. I have following issues with EV-IAM-20380HT:
1. can not find the datasheet of EV-IAM-20380HT, however, the datasheet of IAM-203380 is available.
2. get WHO-AM-I register value is 253 (0xFD), not the 181(0xB5) as indicate in the datasheet, through I2C reading.
3. the SDA and SCK of EV-IAM-20380HT is directly connected to the master’s SDA & SCK (3.3V logic) in my application. Do the SDA and SCK need to pull up to +3.3V with 2x 10k resistors respectively?
I do appreciate your advice and help me sort out the issues above.
Qingshan
Hi Qingshan and thanks for your inquiry and interest in our products.
Concerning your points:
1. Please refer to the attached application note, dedicated to IAM-20380HT EVB (please note that in some pictures you will find a mistaken label referring to IAM-20680: it's only a recycled picture, because the schematic is equivalent for the two devices, being them pin2pin compatible).
2. IAM-20380 and IAM-20380HT are different part numbers, so they have different Whoami codes. You're using a EVB equipped with 20380HT, so 0xFD is the value to expect.
3. Yes, the pull-ups are needed.
Hope it helps.
Best regards,
Simone