XR20M1170G16-0B Datasheet, PDF (45/56 Pages) Exar Corporation – I2C/SPI UART WITH 64-BYTE FIFO

REV. 1.1.0
XR20M1170
I2C/SPI UART WITH 64-BYTE FIFO
FIGURE 24. MODEM INPUT PIN INTERRUPT
SDA
SLAVE
ADDRESS
W A MSR REGISTER A S
SLAVE
ADDRESS
RA
DATA
A
IRQ#
TD2
TD3
MODEM pin
FIGURE 25. GPIO PIN INTERRUPT
ACK from slave
ACK from slave
ACK from master
SDA
SLAVE
ADDRESS
W A IOSTATE REG. A S
SLAVE
ADDRESS
RA
DATA
AP
IRQ#
TD4
TD5
GPIOn
45