UPSD3422_06 Datasheet, PDF (136/293 Pages) STMicroelectronics – Turbo Plus Series Fast Turbo 8032 MCU with USB and Programmable Logic

SPI (synchronous peripheral interface)
uPSD34xx
Figure 45. SPI full-duplex data exchange
Master Device
8-Bit Shift
Register
SPIRxD
SPITxD
SPI Bus
Slave Device
MISO
MOSI
8-Bit Shift
Register
SPICLK
SCLK
Baud Rate
Generator
SS
Figure 46. SPI receive operation example
SPICLK
(SPO=0)
1 frame
SPICLK
(SPO=1)
SPIRXD
Bit7
Bit0
Bit1
Bit7
Bit0
Bit1
AI10485
Bit7
RISF
RORIS
BUSY
SPIINTR
SPIRDR Full
interrupt requested
Interrupt handler
read data in SPIRDR
SPIRDR Full
interrupt requested
Transmit End
interrupt requested
AI07855
136/293