Intel Agilex Series Configuration User Manual page 163

5. Remote System Update (RSU)
683673 | 2021.10.29
Command Code
(Hex)
34
QSPI_SET_CS
3A
QSPI_READ
39
QSPI_WRITE
(14)
This number does not include the command or response header.
Send Feedback
Command Response
(14) (14)
Length Length
Important: When resetting quad SPI, you must follow instructions specified in
1 0 Specifies one of the attached quad SPI devices via the chip select lines. Takes a one-word
argument as described below:
•
•
Note: The HPS can use
This command is optional for the AS x4 configuration scheme, the chip select line follows the last
executed
JTAG configuration scheme requires executing this command to access the QSPI flash that
connects the SDM_IO pins.
Access to the QSPI flash memory devices using SDM_IO pins is only available for the AS x4
configuration scheme, JTAG configuration, and a design compiled for AS x4 configuration. For the
Avalon streaming interface (Avalon ST) configuration scheme, you must connect QSPI flash
memories to GPIO pins.
Important: When resetting quad SPI, you must follow instructions specified in
2 N Reads the attached quad SPI device. The maximum transfer size is 4 kilobytes (KB) or 1024
words.
Takes two arguments:
•
•
When successful, returns OK followed by the read data from the quad SPI device. A failure
response returns an error code.
For a partially successful read,
Note: You cannot run the
Important: When resetting quad SPI, you must follow instructions specified in
2+N 0 Writes data to the quad SPI device. The maximum transfer size is 4 kilobytes (KB) or 1024 words.
Takes three arguments:
SPI Flash on page 158.
Bits[31:28]: Flash device to select. The value
. is the only signal that the FPGA can use to access the quad SPI flash
nCSO[0] nCSO[0]
device.
Bits[27:0]: Reserved (write as 0).
to access 3 additional quad SPI devices.
nCSO[3:1]
command or defaults to
QSPI_SET_CS
SPI Flash on page 158.
The quad SPI flash address (one word). The address must be word aligned. The device returns
the error code for non-aligned addresses.
0x1
Number of words to read (one word).
QSPI_READ
command while device configuration is in progress.
QSPI_READ
SPI Flash on page 158.
Description
Resetting Quad
selects the flash that corresponds to
4'b0000
after the AS x4 configuration. The
nCSO[0]
Resetting Quad
may erroneously return the status.
OK
Resetting Quad
Intel ® Agilex ™ Configuration User Guide
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