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Chapter 6
Memory Map
This chapter explains memory mapping in the MPC8272ADS.
6.1
Overview
All accesses to MPC8272ADS memory slaves are controlled by the MPC8272 memory
controller. Therefore, the memory map is reprogrammable to suit the user. After the debug
station performs hard reset, the debugger checks for existence, size, delay and type of the
Flash memory SIMM mounted on board, decides the assignments of CS0 and CS4
(E 2 PROM and Flash), and programs the memory controller accordingly. The SDRAM,
E 2 PROM, and Flash memory respond to all types of memory access (for example, problem
/ supervisory, program / data, and DMA).
This memory map is a recommended memory map, and because it is a 'soft' map, devices’
addresses may be moved about the map for user convenience. Two memory maps depend
on the device assigned to CS0 (regardless of the hard reset configuration word source). The
memory address for the device assigned to CS0 is always the same as determined in the
hard-reset configuration word. Because Flash and E 2 PROM require different memory
spaces, different memory maps are devised for each case. For details, see Table 6-1 and
Table 6-2.
Table 6-1. MPC8272ADS Memory Map — Flash (or BCSR) as Boot Device
Address
Range
Memory
Type
Device Name
Port
Size
Memory
Size
00000000 -
60x SDRAM
64 MByte
64 MByte
64
64 MBytes
03FFFFFF
04000000 -
Empty space
Optional 4MByte local bus SDRAM for legacy
—
5 MBytes
044FFFFF
support
Chapter 6. Memory Map
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MPC8272CVRB 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PowerQUICC II⑩ Family Hardware Specifications
MPC8272CVRE 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PowerQUICC II⑩ Family Hardware Specifications
MPC8272CVRI 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PowerQUICC II⑩ Family Hardware Specifications
MPC8272CVRM 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PowerQUICC II⑩ Family Hardware Specifications
MPC8272CVRMIBA 功能描述:微处理器 - MPU 266 MHz 505.4 MIPS RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324
MPC8272CVRP 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PowerQUICC II⑩ Family Hardware Specifications
MPC8272CVRPIEA 功能描述:微处理器 - MPU 300 MHz 570 MIPS RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324