AT91SAM7X256(2006_02) 查看數據表（PDF） - Atmel Corporation

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AT91SAM7X256
(Rev.:2006_02)

AT91 ARM® Thumb®-based Microcontrollers

Atmel Corporation 

AT91SAM7X256/128 Preliminary

1. Description

Atmel's AT91SAM7X256/128 is a member of a series of highly integrated Flash microcontrollers

based on the 32-bit ARM RISC processor. It features 256/128 Kbyte high-speed Flash and

64/32 Kbyte SRAM, a large set of peripherals, including an 802.3 Ethernet MAC and a CAN con-

troller. A complete set of system functions minimizes the number of external components.

The embedded Flash memory can be programmed in-system via the JTAG-ICE interface or via

a parallel interface on a production programmer prior to mounting. Built-in lock bits and a secu-

rity bit protect the firmware from accidental overwrite and preserve its confidentiality.

The AT91SAM7X256/128 system controller includes a reset controller capable of managing the

power-on sequence of the microcontroller and the complete system. Correct device operation

can be monitored by a built-in brownout detector and a watchdog running off an integrated RC

oscillator.

By combining the ARM7TDMI processor with on-chip Flash and SRAM, and a wide range of

peripheral functions, including USART, SPI, CAN Controller, Ethernet MAC, Timer Counter, RTT

and Analog-to-Digital Converters on a monolithic chip, the AT91SAM7X256/128 is a powerful

device that provides a flexible, cost-effective solution to many embedded control applications

requiring communication over, for example, Ethernet, CAN wired and Zigbee™ wireless

networks.

2. Configuration Summary of the AT91SAM7X256 and AT91SAM7X128

The AT91SAM7X256 and AT91SAM7X128 differ only in memory sizes. Table 2-1 summarizes

the configurations of the two devices.

Table 2-1. Configuration Summary

Device

Flash

AT91SAM7X256

256K bytes

AT91SAM7X128

128K bytes

SRAM

64K bytes

32K bytes

3

6120D–ATARM–02-Feb-06

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