MPC8280 datasheet(568/1386 Pages) FREESCALE

Part #	MPC8280

Description	PowerQUICC??II Family Reference Manual

PDF	1386 Pages

Scroll/Zoom	100%

Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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568 / 1386 page

Communications Processor Module Overview

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

14-18

Freescale Semiconductor

Figure 14-7. Internal RAM Block Diagram

The internal data RAM can be accessed by the following:

•

CP load/store machine

•

CP block transfer module (BTM)

•

PPC 60x slave

•

SDMA—60x bus

•

SDMA—Local bus

The internal instruction RAM can be accessed by the following:

•

CP instruction fetcher (in case of microcode from RAM)

•

PPC 60x slave

Figure 14-8 shows a memory map of the internal data RAM. The addresses refer to CPU address space.

32 Kbytes

Slave address

RISC data address

Internal Data RAM

DMA (PPC) address

DMA (local) address

BTM address

Slave data

RISC data

DMA (PPC) data

DMA (local) data

BTM data

32 Kbytes

Slave address

RISC Instruction address

RISC trace buffer address

Internal Instruction RAM

Slave data

RISC instruction

Trace buffer data

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