DRA790 Datasheet, PDF (332/436 Pages) Texas Instruments – Infotainment Applications Processor

DRA790, DRA791
DRA793, DRA797
SPRS968A – AUGUST 2016 – REVISED FEBRUARY 2017
www.ti.com
• Local Enhanced Direct Memory Access (EDMA) controller features:
– Channel controller (CC) : 64-channel, 128 PaRAM, 2 Queues
– 2 x Third-party Transfer Controllers (TPTC0 and TPTC1):
• Each TC has a 128-bit read port and a 128-bit write port
• 2KiB FIFOs on each TPTC
– 1-dimensional/2-dimensional (1D/2D) addressing
– Chaining capability
• DSP subsystem integrated MMUs:
– Two MMUs are integrated:
• The MMU0 is located between DSP MDMA master port and the device L3_MAIN interconnect
and can be optionally bypassed
• The MMU1 is located between the EDMA master port and the device L3_MAIN interconnect
• A DSP local Power-Down Controller (PDC) is responsible to power-down various parts of the DSP
C66x CorePac, or the entire DSP C66x CorePac.
• The DSP subsystem System Control logic provides:
– Slave idle and master standby protocols with device PRCM for powerdown
– OCP Disconnect handshake for init and target busses
– Asynchronous reset
– Power-down modes:
• "Clockstop" mode featuring wake-up on interrupt event. The DMA event wake-up is managed in
software.
• The device DSP subsystem is supplied by a PRCM DPLL, but DSP1 has integrated its own PLL
module outside the C66x CorePac for clock gating and division.
• The device DSP subsystem has following port instances to connect to remaining part of the
device. See also :
– A 128-bit initiator (DSP MDMA master) port for MDMA/Cache requests
– A 128-bit initiator (DSP EDMA master) port for EDMA requests
– A 32-bit initiator (DSP CFG master) port for configuration requests
– A 128-bit target (DSP slave) port for requests to DSP memories and various peripherals
• C66x DSP subsystem (DSPSS) safety aspects:
– Above mentioned memory ECC/ED mechanisms
– MMUs enable mapping of only the necessary application space to the processor
– Memory Protection Units internal to the DSPSS (in L1P, L1D and L2 memory controllers) and
external to DSPSS (firewalls) to help define legal accesses and raise exceptions on illegal
accesses
– Exceptions: Memory errors, various DSP errors, MMU errors and some system errors are detected
and cause exceptions. The exceptions could be handled by the DSP or by a designated safety
processor at the chip level. Note that it may not be possible for the safety processor to completely
handle some exceptions
Unsupported features on the C66x DSP core for the device are:
• The Extended Memory Controller MPAX (memory protection and address extension) 36-bit addressing
is NOT supported
Known DSP subsystem powermode restrictions for the device are:
• "Full logic / RAM retention" mode featuring wake-up on both interrupt or DMA event (logic in “always
on” domain). Only OFF mode is supported by DSP subsystem, requiring full boot.
332 Detailed Description
Copyright © 2016–2017, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Links: DRA790 DRA791 DRA793 DRA797