|
TMS570LS3135_17 Datasheet, PDF (55/172 Pages) Texas Instruments – 16- and 32-Bit RISC Flash Microcontroller | |||
|
◁ |
www.ti.com
TMS570LS3135, TMS570LS2135, TMS570LS2125
SPNS164C â APRIL 2012 â REVISED APRIL 2015
6.5 ARM-R4F CPU Information
6.5.1 Summary of ARM Cortex-R4F CPU Features
The features of the ARM Cortex-R4F CPU include:
⢠An integer unit with integral EmbeddedICE-RT logic.
⢠High-speed Advanced Microprocessor Bus Architecture (AMBA) Advanced eXtensible Interfaces (AXI)
for Level two (L2) master and slave interfaces.
⢠Floating Point Coprocessor
⢠Dynamic branch prediction with a global history buffer, and a 4-entry return stack
⢠Low interrupt latency.
⢠Nonmaskable interrupt.
⢠A Harvard Level one (L1) memory system with:
â Tightly-Coupled Memory (TCM) interfaces with support for error correction or parity checking
memories
â ARMv7-R architecture Memory Protection Unit (MPU) with 12 regions
⢠Dual core logic for fault detection in safety-critical applications.
⢠An L2 memory interface:
â Single 64-bit master AXI interface
â 64-bit slave AXI interface to TCM RAM blocks
⢠A debug interface to a CoreSight Debug Access Port (DAP).
⢠A trace interface to a CoreSight ETM-R4.
⢠A Performance Monitoring Unit (PMU).
⢠A Vectored Interrupt Controller (VIC) port.
For more information on the ARM Cortex-R4F CPU see www.arm.com.
6.5.2 ARM Cortex-R4F CPU Features Enabled by Software
The following CPU features are disabled on reset and must be enabled by the application if required.
⢠ECC On Tightly-Coupled Memory (TCM) Accesses
⢠Hardware Vectored Interrupt (VIC) Port
⢠Floating Point Coprocessor
⢠Memory Protection Unit (MPU)
6.5.3 Dual Core Implementation
The device has two Cortex-R4F cores, where the output signals of both CPUs are compared in the CCM-
R4 unit. To avoid common mode impacts the signals of the CPUs to be compared are delayed by two
clock cycles as shown in Figure 6-3.
The CPUs have a diverse CPU placement given by following requirements:
⢠different orientation; for example, CPU1 = "north" orientation, CPU2 = "flip west" orientation
⢠dedicated guard ring for each CPU
North
Flip West
F
Figure 6-2. Dual-CPU Orientation
Copyright © 2012â2015, Texas Instruments Incorporated
System Information and Electrical Specifications
55
Submit Documentation Feedback
|
▷ |