Fetch Interface - 4.1 English

Soft Error Mitigation Controller Product Guide (PG036)

Document ID
PG036
Release Date
2022-05-04
Version
4.1 English

The Fetch Interface provides a mechanism for the controller to request data from an external source.

During error correction and error classification, the controller may need to fetch a frame of configuration data or a frame of essential bit data. The controller is designed to write a command describing the desired data to the Fetch Interface in binary. The external source must use the information to fetch the data and return it to the Fetch Interface.

Table 2-20: Fetch Interface Signals

Name

Sense

I/O

Description

fetch_txdata[7:0]

HIGH

O

Parallel transmit data from controller.

fetch_txwrite

HIGH

O

Write strobe, qualifies validity of parallel transmit data.

fetch_txfull

HIGH

I

This signal implements flow control on the transmit channel, from the shim (peripheral) to the controller.

fetch_rxdata[7:0]

HIGH

I

Parallel receive data from the shim (peripheral).

fetch_rxread

HIGH

O

Read strobe, acknowledges receipt of parallel receive data.

fetch_rxempty

HIGH

I

This signal implements flow control on the receive channel, from the shim (peripheral) to the controller.

fetch_tbladdr[31:0]

HIGH

I

Used to specify the starting address of the controller data table in the external source.