Datasheet

Functional overview STM32L496xx
60/272 DS11585 Rev 9
LCD parallel interface
The FMC can be configured to interface seamlessly with most graphic LCD controllers. It
supports the Intel 8080 and Motorola 6800 modes, and is flexible enough to adapt to
specific LCD interfaces. This LCD parallel interface capability makes it easy to build cost
effective graphic applications using LCD modules with embedded controllers or high
performance solutions using external controllers with dedicated acceleration.
3.40 Dual-flash Quad SPI memory interface (QUADSPI)
The Dual-flash Quad SPI is a specialized communication interface targeting single, dual or
quad SPI flash memories. It can operate in any of the three following modes:
• Indirect mode: all the operations are performed using the QUADSPI registers
• Status polling mode: the external flash status register is periodically read and an
interrupt can be generated in case of flag setting
• Memory-mapped mode: the external Flash is memory mapped and is seen by the
system as if it were an internal memory
Both throughput and capacity can be increased two-fold using dual-flash mode, where two
Quad SPI flash memories are accessed simultaneously.
The Dual-flash Quad SPI interface supports:
• Three functional modes: indirect, status-polling, and memory-mapped
• Dual-flash mode, where 8 bits can be sent/received simultaneously by accessing two
flash memories in parallel.
• SDR and DDR support
• Fully programmable opcode for both indirect and memory mapped mode
• Fully programmable frame format for both indirect and memory mapped mode
• Each of the 5 following phases can be configured independently (enable, length,
single/dual/quad communication)
– Instruction phase
– Address phase
– Alternate bytes phase
– Dummy cycles phase
– Data phase
• Integrated FIFO for reception and transmission
• 8, 16, and 32-bit data accesses are allowed
• DMA channel for indirect mode operations
• Programmable masking for external flash flag management
• Timeout management
• Interrupt generation on FIFO threshold, timeout, status match, operation complete, and
access error
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