TMS320DM355 datasheet(62/163 Pages) TI1

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ARM926EJ-S

16KI$

8KD$

MMU

CP15

Arbiter

I-AHB

D-AHB

Master

I-TCM

D-TCM

16K

RAM0

RAM1

16K

ROM

Arbiter

Slave

MasterIF

ARM

Interrupt

Controller

(AINTC)

Control

System

PLLC2

PLLC1

(PSC)

Controller

Sleep

Power

Peripherals

...

TMS320DM355

SPRS463G – SEPTEMBER 2007 – REVISED JUNE 2010

www.ti.com

–

Image Pipe (IPIPE)

–

H3A Engine (Hardware engine for computing Auto-focus, Auto white balance, and Auto exposure)

•

Video Processing Back End (VPBE)

–

On Screen Display (OSD)

–

Video Encoder Engine (VENC)

Figure 3-1 shows the functional block diagram of the DM355 ARM Subsystem.

Figure 3-1. DM355 ARM Subsystem Block Diagram

3.2

ARM926EJ-S RISC CPU

The ARM Subsystem integrates the ARM926EJ-S processor. The ARM926EJ-S processor is a member of

ARM9 family of general-purpose microprocessors. This processor is targeted at multi-tasking applications

where full memory management, high performance, low die size, and low power are all important. The

ARM926EJ-S processor supports the 32-bit ARM and 16 bit THUMB instruction sets, enabling the user to

trade off between high performance and high code density. Specifically, the ARM926EJ-S processor

supports the ARMv5TEJ instruction set, which includes features for efficient execution of Java byte codes,

providing Java performance similar to Just in Time (JIT) Java interpreter, but without associated code

overhead.

The ARM926EJ-S processor supports the ARM debug architecture and includes logic to assist in both

hardware and software debug. The ARM926EJ-S processor has a Harvard architecture and provides a

complete high performance subsystem, including:

•

ARM926EJ -S integer core

•

CP15 system control coprocessor

•

Memory Management Unit (MMU)

•

Separate instruction and data Caches

•

Write buffer

•

Separate instruction and data Tightly-Coupled Memories (TCMs) [internal RAM] interfaces

•

Separate instruction and data AHB bus interfaces

Detailed Device Description

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