If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
7.3.19 Interrupt Pin — Functional Description and Usage (INTB)
1. On DS90UB925Q-Q1, set register 0xC6[5] = 1 and 0xC6[0] = 1
2. DS90UB926Q-Q1 deserializer INTB_IN (pin 16) is set LOW by some downstream device.
3. DS90UB925Q-Q1 serializer pulls INTB (pin 31) LOW. The signal is active low, so a LOW indicates an
interrupt condition.
4. External controller detects INTB = LOW; to determine interrupt source, read ISR register .
5. A read to ISR will clear the interrupt at the DS90UB925Q-Q1, releasing INTB.
6. The external controller typically must then access the remote device to determine downstream interrupt
source and clear the interrupt driving INTB_IN. This would be when the downstream device releases the
INTB_IN (pin 16) on the DS90UB926Q-Q1. The system is now ready to return to step (1) at next falling edge of INTB_IN.
