参数资料
型号: RM48L950PGET
厂商: TEXAS INSTRUMENTS INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 200 MHz, RISC MICROCONTROLLER, PQFP144
封装: GREEN, PLASTIC, LQFP-144
文件页数: 107/154页
文件大小: 2807K
代理商: RM48L950PGET
PRODUCTPREVIEW
North
Flip West
F
SPNS174
– SEPTEMBER 2011
4.5
ARM
Cortex-R4F CPU Information
4.5.1
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.
Non-maskable interrupt.
A Harvard Level one (L1) memory system with:
– Tightly-Coupled Memory (TCM) interfaces with support for error correction or parity checking
memories
– ARMv7-R architecture Memory Protection Unit (MPU) with 12 regions
Dual core logic for fault detection in safety-critical applications.
An L2 memory interface:
– Single 64-bit master AXI interface
– 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 please see www.arm.com.
4.5.2
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
Harware Vectored Interrupt (VIC) Port
Floating Point Coprocessor
Memory Protection Unit (MPU)
4.5.3
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 2
clock cycles as shown in Figure 4-3.
The CPUs have a diverse CPU placement given by following requirements:
different orientation; e.g. CPU1 = "north" orientation, CPU2 = "flip west" orientation
dedicated guard ring for each CPU
Figure 4-2. Dual - CPU Orientation
56
System Information and Electrical Specifications
Copyright
2011, Texas Instruments Incorporated
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