Module xip_ssi

DW_apb_ssi has the following features:

• APB interface - Allows for easy integration into a DesignWare Synthesizable Components for AMBA 2 implementation.
• APB3 and APB4 protocol support.
• Scalable APB data bus width - Supports APB data bus widths of 8, 16, and 32 bits.
• Serial-master or serial-slave operation - Enables serial communication with serial-master or serial-slave peripheral devices.
• Programmable Dual/Quad/Octal SPI support in Master Mode.
• Dual Data Rate (DDR) and Read Data Strobe (RDS) Support - Enables the DW_apb_ssi master to perform operations with the device in DDR and RDS modes when working in Dual/Quad/Octal mode of operation.
• Data Mask Support - Enables the DW_apb_ssi to selectively update the bytes in the device. This feature is applicable only in enhanced SPI modes.
• eXecute-In-Place (XIP) support - Enables the DW_apb_ssi master to behave as a memory mapped I/O and fetches the data from the device based on the APB read request. This feature is applicable only in enhanced SPI modes.
• DMA Controller Interface - Enables the DW_apb_ssi to interface to a DMA controller over the bus using a handshaking interface for transfer requests.
• Independent masking of interrupts - Master collision, transmit FIFO overflow, transmit FIFO empty, receive FIFO full, receive FIFO underflow, and receive FIFO overflow interrupts can all be masked independently.
• Multi-master contention detection - Informs the processor of multiple serial-master accesses on the serial bus.
• Bypass of meta-stability flip-flops for synchronous clocks - When the APB clock (pclk) and the DW_apb_ssi serial clock (ssi_clk) are synchronous, meta-stable flip-flops are not used when transferring control signals across these clock domains.
• Programmable delay on the sample time of the received serial data bit (rxd); enables programmable control of routing delays resulting in higher serial data-bit rates.
• Programmable features:

• Serial interface operation - Choice of Motorola SPI, Texas Instruments Synchronous Serial Protocol or National Semiconductor Microwire.
• Clock bit-rate - Dynamic control of the serial bit rate of the data transfer; used in only serial-master mode of operation.
• Data Item size (4 to 32 bits) - Item size of each data transfer under the control of the programmer.

• Configured features:

• FIFO depth - 16 words deep. The FIFO width is fixed at 32 bits.
• 1 slave select output.
• Hardware slave-select - Dedicated hardware slave-select line.
• Combined interrupt line - one combined interrupt line from the DW_apb_ssi to the interrupt controller.
• Interrupt polarity - active high interrupt lines.
• Serial clock polarity - low serial-clock polarity directly after reset.
• Serial clock phase - capture on first edge of serial-clock directly after reset.

Modules

• baudr
  Baud rate
• ctrlr0
  Control register 0
• ctrlr1
  Master Control register 1
• dmacr
  DMA control
• dmardlr
  DMA RX data level
• dmatdlr
  DMA TX data level
• dr0
  Data Register 0 (of 36)
• icr
  Interrupt clear
• idr
  Identification register
• imr
  Interrupt mask
• isr
  Interrupt status
• msticr
  Multi-master interrupt clear
• mwcr
  Microwire Control
• risr
  Raw interrupt status
• rx_sample_dly
  RX sample delay
• rxflr
  RX FIFO level
• rxftlr
  RX FIFO threshold level
• rxoicr
  RX FIFO overflow interrupt clear
• rxuicr
  RX FIFO underflow interrupt clear
• ser
  Slave enable
• spi_ctrlr0
  SPI control
• sr
  Status register
• ssi_version_id
  Version ID
• ssienr
  SSI Enable
• txd_drive_edge
  TX drive edge
• txflr
  TX FIFO level
• txftlr
  TX FIFO threshold level
• txoicr
  TX FIFO overflow interrupt clear

Structs

• RegisterBlock
  Register block

Type Aliases

• BAUDR
  BAUDR (rw) register accessor: Baud rate
• CTRLR0
  CTRLR0 (rw) register accessor: Control register 0
• CTRLR1
  CTRLR1 (rw) register accessor: Master Control register 1
• DMACR
  DMACR (rw) register accessor: DMA control
• DMARDLR
  DMARDLR (rw) register accessor: DMA RX data level
• DMATDLR
  DMATDLR (rw) register accessor: DMA TX data level
• DR0
  DR0 (rw) register accessor: Data Register 0 (of 36)
• ICR
  ICR (r) register accessor: Interrupt clear
• IDR
  IDR (r) register accessor: Identification register
• IMR
  IMR (rw) register accessor: Interrupt mask
• ISR
  ISR (r) register accessor: Interrupt status
• MSTICR
  MSTICR (r) register accessor: Multi-master interrupt clear
• MWCR
  MWCR (rw) register accessor: Microwire Control
• RISR
  RISR (r) register accessor: Raw interrupt status
• RXFLR
  RXFLR (r) register accessor: RX FIFO level
• RXFTLR
  RXFTLR (rw) register accessor: RX FIFO threshold level
• RXOICR
  RXOICR (r) register accessor: RX FIFO overflow interrupt clear
• RXUICR
  RXUICR (r) register accessor: RX FIFO underflow interrupt clear
• RX_SAMPLE_DLY
  RX_SAMPLE_DLY (rw) register accessor: RX sample delay
• SER
  SER (rw) register accessor: Slave enable
• SPI_CTRLR0
  SPI_CTRLR0 (rw) register accessor: SPI control
• SR
  SR (r) register accessor: Status register
• SSIENR
  SSIENR (rw) register accessor: SSI Enable
• SSI_VERSION_ID
  SSI_VERSION_ID (r) register accessor: Version ID
• TXD_DRIVE_EDGE
  TXD_DRIVE_EDGE (rw) register accessor: TX drive edge
• TXFLR
  TXFLR (r) register accessor: TX FIFO level
• TXFTLR
  TXFTLR (rw) register accessor: TX FIFO threshold level
• TXOICR
  TXOICR (r) register accessor: TX FIFO overflow interrupt clear