DRA790 Datasheet, PDF (348/436 Pages) Texas Instruments – Infotainment Applications Processor

DRA790, DRA791
DRA793, DRA797
SPRS968A – AUGUST 2016 – REVISED FEBRUARY 2017
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6.11.7 QSPI
The quad serial peripheral interface (QSPI™) module is a kind of SPI module that allows single, dual, or
quad read access to external SPI devices. This module has a memory mapped register interface, which
provides a direct interface for accessing data from external SPI devices and thus simplifying software
requirements. The QSPI works as a master only.
The QSPI supports the following features:
• General SPI features:
– Programmable clock divider
– Six pin interface
– Programmable length (from 1 to 128 bits) of the words transferred
– Programmable number (from 1 to 4096) of the words transferred
– 4 external chip-select signals
– Support for 3-, 4-, or 6-pin SPI interface
– Optional interrupt generation on word or frame (number of words) completion
– Programmable delay between chip select activation and output data from 0 to 3 QSPI clock cycles
– Programmable signal polarities
– Programmable active clock edge
– Software-controllable interface allowing for any type of SPI transfer
– Control through L3_MAIN configuration port
• Serial flash interface (SFI) features:
– Serial flash read/write interface
– Additional registers for defining read and write commands to the external serial flash device
– 1 to 4 address bytes
– Fast read support, where fast read requires dummy bytes after address bytes; 0 to 3 dummy bytes
can be configured.
– Dual read support
– Quad read support
– Little-endian support only
– Linear increment addressing mode only
The QSPI supports only dual and quad reads. Dual or quad writes are not supported. In addition, there is
no "pass through" mode supported where the data present on the QSPI input is sent to its output.
For more information, see section Quad Serial Peripheral Interface (QSPI) in chapter Serial
Communication Interfaces of the device TRM.
6.11.8 McASP
The McASP functions as a general-purpose audio serial port optimized to the requirements of various
audio applications. The McASP module can operate in both transmit and receive modes. The McASP is
useful for time-division multiplexed (TDM) stream, Inter-IC Sound (I2S) protocols reception and
transmission as well as for an intercomponent digital audio interface transmission (DIT). The McASP has
the flexibility to gluelessly connect to a Sony/Philips digital interface (S/PDIF) transmit physical layer
component.
Although intercomponent digital audio interface reception (DIR) mode (i.e. S/PDIF stream receiving) is not
natively supported by the McASP module, a specific TDM mode implementation for the McASP receivers
allows an easy connection to external DIR components (for example, S/PDIF to I2S format converters).
The device have integrated 8 McASP modules (McASP1-McASP8) with:
• McASP1 and McASP2 supporting 16 channels with independent TX/RX clock/sync domain
• McASP3 through McASP7 modules supporting 4 channels with independent TX/RX clock/sync domain
348 Detailed Description
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