Table 33-12. Assignment of Interrupt Request Lines (continued)
IRQ/DMA line
QSPI_FR Flag
Interrupt Description
ipi_int_ored
TBFF, TFF, ILLINE,
RBDF, RBOF, TBUF,
ABSEF, ABOF, IPAEF,
IPIEF, IUEF, AITEF,
AIBSEF
Logical OR from all the QSPI_FR flags mentioned
33.7 Functional Description
This section provides the functional information of the QuadSPI module.
33.7.1 Serial Flash Access Schemes
The following access schemes are possible, depending on the serial flash devices attached
to the QuadSPI module.
Table 33-13. Access Schemes for Serial Flash Data Access
Access Scheme
One Flash Device on
Port A
One Flash Device on
Port B
Two identical Flash
Devices connected
on Port A and Port B
Individual Flash Mode: Access to Flash A
Yes
N/a
Yes
Individual Flash Mode: Access to Flash B
N/a
Yes
Yes
Note
If two different flash devices are attached, they can be operated
only in Individual Flash Mode.
In the Individual Flash Mode, all supported commands are
available.
Unless explicitly noted, all the following descriptions relate to the Individual Flash Mode.
33.7.2 Normal Mode
This mode is used to allow communication with an external serial flash device.
Compared to the standard SPI protocol, this communication method uses up to 4
bidirectional data lines operating at high data rates. The communication to the external
serial flash device consists of an instruction code and optional address, mode, dummy
Chapter 33 Quad Serial Peripheral Interface (QuadSPI)
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
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