Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 7/19/2024
Public
Document Table of Contents

A.2.5. HPS Use of SDM QSPI Controller Signal Description

The QSPI Flash controller provides four chip select outputs to allow control of up to four external QSPI Flash devices. The outputs serve different purposes depending on whether the device is used in single, dual, or quad operation mode. The following table lists the I/O pin use of the QSPI controller interface signals for each operation mode.

Table 432.  QSPI Controller I/O Pin Use
Pin Mode Direction Function
AS_DATA0 Single Output Data output 0
Dual or quad Bidirectional Data I/O 0
AS_DATA1 Single Input Data input 0
Dual or quad Bidirectional Data I/O 1
AS_DATA2 Single or dual Output Active low write protect
Quad Bidirectional Data I/O 2
AS_DATA3 Single, dual, or quad Bidirectional Data I/O 3
AS_nCSO0 Single, dual, or quad Output Active low target select 0
AS_nCSO1 Active low target select 1
AS_nCSO2 Active low target select 2
AS_nCSO3 Active low target select 3
AS_CLK Single Output Quad SPI serial clock output
AS_nRST All Output Active low reset