commands will lead to Bank1. The extended address register needs to be update with
the respective value for access to other banks. This effectively converts the legacy
24-bit address command into 32-bit address commands.
• Separation of address into row and column address
This mode has been introduced for flashes which needs addresses segregated into
Row and Column. The value in QSPI_SFACR[CAS] defines the width of the column
address required by a flash. The actual address to be provided will be derived from
the incoming address in case of AHB initiated transactions and the value of SFAR in
case of IPS initiated transactions , if QSPI_SFACR[CAS] is set to 0, else the actual
address will take CAS into consideration. If QSPI_SFACR[CAS] is 3 then bits 26-3
of the address programmed are sent to flash as it page address in case flash is
operating in 24bit mode and bits 2-0 are sent as its column address. If a flash
requirement for column address is less than the number of pads in which address has
to be sent than the remaining bits are appended with 0 by QuadSPI. The user must
program the operand value in CADDR and CADDR_DDR command accordingly. It
must be ensured that the total number of address bits request by flash as its page and
column address must not be more than 32 bits.
• Word addressable mode for Flash
This mode has been introduced for flashes which has word addressable memory i.e.
each address of the flash contains one word (two bytes) of data. The QSPI_SFACR
[WA] is set to 1 to enter this mode. QuadSPI internally divides the incoming address
in the AHB bus or the address in the QSPI_SFAR to map it to a valid flash location.
For example, if the incoming address is 0x2004, the controller re-maps this address
to access the flash location 0x1002. If not in this mode, the incoming address 0x2004
will be mapped to flash location 0x2004.
33.7.3 HyperRAM Support
The QuadSPI supports HyperRAM memories and by virtue of this protocol, QuadSPI
supports the following functionalities.
• Bidirectional data strobe/read write data strobe (RWDS)
• When QuadSPI is configured to use the HyperRAM mode, the RWDS pad
should be pulled down.
• Variable refresh latency
• If QuadSPI_MCR[VAR_LAT_EN] field is set, based on the status of RWDS
from HyperRAM during Command/Address phase, QuadSPI includes additional
initial access latency. If RWDS is high, QuadSPI will include twice + 1 the
Functional Description
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
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NXP Semiconductors
Summary of Contents for MWCT101 S Series
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Page 50: ...Conventions MWCT101xS Series Reference Manual Rev 3 07 2019 50 NXP Semiconductors...
Page 70: ...Aliased bit band regions MWCT101xS Series Reference Manual Rev 3 07 2019 70 NXP Semiconductors...
Page 78: ...Pinout diagrams MWCT101xS Series Reference Manual Rev 3 07 2019 78 NXP Semiconductors...
Page 96: ...WCT101xS safety concept MWCT101xS Series Reference Manual Rev 3 07 2019 96 NXP Semiconductors...
Page 130: ...Functional description MWCT101xS Series Reference Manual Rev 3 07 2019 130 NXP Semiconductors...
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Page 430: ...Functional Description MWCT101xS Series Reference Manual Rev 3 07 2019 430 NXP Semiconductors...
Page 472: ...Application Information MWCT101xS Series Reference Manual Rev 3 07 2019 472 NXP Semiconductors...
Page 528: ...Module clocks MWCT101xS Series Reference Manual Rev 3 07 2019 528 NXP Semiconductors...
Page 634: ...SRAM configuration MWCT101xS Series Reference Manual Rev 3 07 2019 634 NXP Semiconductors...
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Page 992: ...ADC calibration scheme MWCT101xS Series Reference Manual Rev 3 07 2019 992 NXP Semiconductors...
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Page 1726: ...Debug and security MWCT101xS Series Reference Manual Rev 3 07 2019 1726 NXP Semiconductors...
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