XR20M1172G28-0B Datasheet, PDF (47/55 Pages) Exar Corporation – TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO

REV. 1.2.0
XR20M1172
TWO CHANNEL 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
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