at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 48
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at91sam9263
Manufacturer Part Number
at91sam9263
Description
At91 Arm Thumb Microcontrollers
Manufacturer
ATMEL Corporation
Datasheet
1.AT91SAM9263.pdf
(1065 pages)
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11.2
Figure 11-1. ARM926EJ-S Internal Functional Block Diagram
11.3
11.3.1
11.3.2
48
Block Diagram
ARM9EJ-S Processor
AT91SAM9263 Preliminary
ARM9EJ-S
Switching State
Interface
ICE
EmbeddedICE
WDATA
-RT
™
Interface
Operating States
ARM9EJ-S
ETM
The ARM9EJ-S processor can operate in three different states, each with a specific instruction
set:
In Jazelle state, all instruction Fetches are in words.
The operating state of the ARM9EJ-S core can be switched between:
• ARM state: 32-bit, word-aligned ARM instructions.
• THUMB state: 16-bit, halfword-aligned Thumb instructions.
• Jazelle state: variable length, byte-aligned Jazelle instructions.
• ARM state and THUMB state using the BX and BLX instructions, and loads to the PC
Processor
RDATA
INSTR
Coprocessor
DA
Interface
IA
Droute
Iroute
ARM926EJ-S
DCACHE
DEXT
MMU
ICACHE
IEXT
Interface
Interface
TCM
Instruction
Bus
Unit
Interface
Interface
AHB
Data
AHB
6249D–ATARM–20-Dec-07
AHB
AHB
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