ISD94100 Series Technical Reference Manual
Sep 9, 2019
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Rev1.09
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6.14.3 Block Diagram
APB
Interface
Control
Status / Control
Registers
Core Logic
8-Level TX
FIFO Buffer
8-Level RX
FIFO Buffer
TX Shift
Register
RX Shift
Register
4-Bit
Skew
Buffer
4-Bit
Skew
Buffer
SPI0_CLK
DMA
Interface
Control
SPI0_MOSI0
SPI0_MISO0
SPI0_SS0
Peripheral clock
SPI0_MOSI1
SPI0_MISO1
Note: SPI0_MOSI1 and SPI0_MISO1 are only available in 2-Bit Transfer mode or Quad I/O mode
SPI0_SS1
Figure 6.14-1 SPI Block Diagram (SPI0)
APB
Interface
Control
Status / Control
Registers
Core Logic
4-Level TX
FIFO Buffer
4-Level RX
FIFO Buffer
TX Shift
Register
RX Shift
Register
4-Bit
Skew
Buffer
4-Bit
Skew
Buffer
SPIx_CLK (I2Sn_BCLK)
DMA
Interface
Control
SPIx_MOSI (I2Sn_DO)
SPIx_MISO (I2Sn_DI)
SPIx_SS (I2Sn_LRCLK)
Peripheral clock
Note: x = 1, 2
SPIx_I2SMCLK
Figure 6.14-2 SPI Block Diagram (SPI1/2)