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interfaces.md

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Hardware Interfaces

Referring to the Comportable guideline for peripheral device functionality, the module uart has the following hardware interfaces defined

  • Primary Clock: clk_i
  • Other Clocks: none
  • Bus Device Interfaces (TL-UL): tl
  • Bus Host Interfaces (TL-UL): none

Peripheral Pins for Chip IO

Pin name Direction Description
rx input Serial receive bit
tx output Serial transmit bit
Port Name Package::Struct Type Act Width Description
lsio_trigger logic uni req 1 Self-clearing status trigger for the DMA. Set when RX or TX FIFOs are past their configured watermarks matching watermark interrupt behaviour.
tl tlul_pkg::tl req_rsp rsp 1

Interrupts

Interrupt Name Type Description
tx_watermark Status raised if the transmit FIFO is past the high-water mark.
rx_watermark Status raised if the receive FIFO is past the high-water mark.
tx_done Event raised if the transmit FIFO has emptied and no transmit is ongoing.
rx_overflow Event raised if the receive FIFO has overflowed.
rx_frame_err Event raised if a framing error has been detected on receive.
rx_break_err Event raised if break condition has been detected on receive.
rx_timeout Event raised if RX FIFO has characters remaining in the FIFO without being retrieved for the programmed time period.
rx_parity_err Event raised if the receiver has detected a parity error.
tx_empty Status raised if the transmit FIFO is empty.

Security Alerts

Alert Name Description
fatal_fault This fatal alert is triggered when a fatal TL-UL bus integrity fault is detected.

Security Countermeasures

Countermeasure ID Description
UART.BUS.INTEGRITY End-to-end bus integrity scheme.