Chapter 9: Using User Flash Memory in MAX II Devices
Software Support for UFM Block
9–35
Table 9–14.
SPI Timing Parameters for Extended Mode
Symbol
t
SCK2NCS
t
HNCSHIGH
t
NCS2SCK
Description
The time required for the
SCK
signal falling
edge to
nCS
signal rising edge
The time that the
nCS
signal must be held
high
The time required for the
nCS
signal falling
edge to
SCK
signal rising edge
Minimum (ns)
50
600
750
Maximum (ns)
—
—
—
Instantiating SPI Using Quartus II altufm Megafunction
shows the altufm megafunction symbol for SPI instantiation in the
Quartus II software.
Figure 9–38.
altufm Megafunction Symbol for SPI Instantiation
You can select the desired logic array interface on page 3 of the altufm MegaWizard
®
Plug-In Manager.
shows page 3 of the altufm MegaWizard Plug-In
Manager, selecting SPI as the interface protocol. On this page, you can choose whether
to implement the Read/Write or Read Only mode as the access mode for the UFM.
You can also select the configuration mode (Base or Extended) for SPI on this page.
You can specify the initial content of the UFM block in page 4 of the altufm
MegaWizard Plug-In Manager as discussed in
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