XR20V2170 Datasheet, PDF (43/52 Pages) Exar Corporation – I2C/SPI UART WITH 64-BYTE FIFO AND RS232 TRANSCEIVER

REV. 1.0.0
XR20V2170
I2C/SPI UART WITH 64-BYTE FIFO AND RS232 TRANSCEIVER
FIGURE 19. MODEM INPUT PIN INTERRUPT
SDA
SLAVE
ADDRESS
W A MSR REGISTER A S
SLAVE
ADDRESS
RA
DATA
A
IRQ#
TD2
TD3
MODEM pin
FIGURE 20. 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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