Datasheet

42. Quad Serial Peripheral Interface (QSPI)
42.1 Description
The Quad Serial Peripheral Interface (QSPI) is a synchronous serial data link that provides communication with
external devices in Master mode.
The QSPI can be used in SPI mode to interface to serial peripherals such as ADCs, DACs, LCD controllers, CAN
controllers and sensors, or in Serial Memory mode to interface to serial Flash memories.
The QSPI allows the system to execute code directly from a serial Flash memory (XIP) without code shadowing to
RAM. The serial Flash memory mapping is seen in the system as other memories such as ROM, SRAM, DRAM,
embedded Flash memory
, etc.
With the support of the Quad SPI protocol, the QSPI allows the system to use high-performance serial Flash
memories which are small and inexpensive, in place of larger and more expensive parallel Flash memories.
Note: Stacked devices with a rollover in the memory address space at each die boundary are not supported.
42.2 Embedded Characteristics
• Master SPI Interface
– Programmable clock phase and clock polarity
– Programmable transfer delays between consecutive transfers, between clock and data, between
deactivation and activation of chip select
• SPI Mode
– Interface to serial peripherals such as ADCs, DACs, LCD controllers, CAN controllers and sensors
– 8-bit/16-bit programmable data length
• Serial Memory Mode
– Interface to serial Flash memories operating in Single-bit SPI, Dual SPI and Quad SPI
– Interface to serial Flash Memories operating in Single Data Rate Mode
– Supports “Execute In Place” (XIP)— code execution by the system directly from a serial Flash memory
– Flexible instruction register for compatibility with all serial Flash memories
– 32-bit address mode (default is 24-bit address) to support serial Flash memories larger than 128 Mbits
– Continuous read mode
– Scrambling/unscrambling “On-The-Fly”
• Connection to DMA Channel Capabilities Optimizes Data Transfers
– One channel for the receiver, one channel for the transmitter
• Register Write Protection
SAM E70/S70/V70/V71 Family
Quad Serial Peripheral Interface (QSPI)
©
2019 Microchip Technology Inc.
Datasheet
DS60001527D-page 1005