XR20M1280 Datasheet, PDF (58/63 Pages) Exar Corporation – I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS

XR20M1280
I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
FIGURE 32. SPI WRITE THR TO CLEAR TX INT
CS#
REV. 1.0.0
SCLK
SI
R/W A3 A2 A1 A0 CH1 CH0 X
D7 D6 D5 D4 D3 D2 D1 D0
GPIOx
td11
IRQ#
FIGURE 33. READ MSR TO CLEAR MODEM INT
CS#
SCLK
SI
R/W A3 A2 A1 A0 CH1 CH0 X
SO
IRQ#
D7 D6 D5 D4 D3 D2 D1 D0
TD12
58