XR20V2172 Datasheet, PDF (49/51 Pages) Exar Corporation – TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO AND RS232 TRANSCEIVER

REV. P1.0.1
PRELIMINARY
XR20V2172
TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO AND RS232 TRANSCEIVER
FIGURE 29. READ IOSTATE TO CLEAR GPIO INT
CS#
SCLK
SI
R/W A3 A2 A1 A0 CH1 CH0 X
SO
IRQ#
FIGURE 30. READ RHR TO CLEAR RX INT
CS#
D7 D6 D5 D4 D3 D2 D1 D0
TD13
SCLK
SI
R/W A3 A2 A1 A0 CH1 CH0 X
SO
IRQ#
D7 D6 D5 D4 D3 D2 D1 D0
TD14
49