AT91RM9200(2003) Ver la hoja de datos (PDF) - Atmel Corporation

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AT91RM9200
(Rev.:2003)

ARM920T™- based Microcontroller

Atmel Corporation 

AT91RM9200

• IEEE1149.1 JTAG Boundary Scan on all Digital Pins

Boot Program

• Default Boot Program stored in ROM-based products

• Downloads and runs an application from external storage media into internal SRAM

• Downloaded code size depends on embedded SRAM size

• Automatic detection of valid application

• Bootloader supporting a wide range of non-volatile memories

– SPI DataFlash® connected on SPI NPCS0

– Two-wire EEPROM

– 8-bit parallel memories on NCS0 if device integrates EBI

• Boot Uploader in case no valid program is detected in external NVM and supporting

several communication media

• Serial communication on a DBGU (XModem protocol)

• USB Device Port (DFU Protocol)

Embedded

Software Services

• Compliant with ATPCS

• Compliant with AINSI/ISO Standard C

• Compiled in ARM/Thumb Interworking

• ROM Entry Service

• Tempo, Xmodem and DataFlash services

• CRC and Sine tables

Reset Controller

• Two reset input lines (NRST and NTRST) providing, respectively:

• Initialization of the User Interface registers (defined in the user interface of each

peripheral) and:

– Sample the signals needed at bootup

– Compel the processor to fetch the next instruction at address zero.

• Initialization of the embedded ICE TAP controller.

Memory Controller

• Programmable Bus Arbiter handling four Masters

– Internal Bus is shared by ARM920T, PDC, USB Host Port and Ethernet MAC

Masters

– Each Master can be assigned a priority between 0 and 7

• Address Decoder provides selection for

– Eight external 256-Mbyte memory areas

– Four internal 1-Mbyte memory areas

– One 256-Mbyte embedded peripheral area

• Boot Mode Select Option

– Non-volatile Boot Memory can be internal or external

– Selection is made by BMS pin sampled at reset

• Abort Status Registers

– Source, Type and all parameters of the access leading to an abort are saved

• Misalignment Detector

– Alignment checking of all data accesses

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1768B–ATARM–08/03

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