6069A–ATARM–05/04
AT91
®
ARM
®

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Microcontrollers
AT91C140
Features
ARM7TDMI
®
ARM
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Processor Core
– In-Circuit Emulator, 36 MHz operation
Ethernet Bridge
– Dual Ethernet 10/100 Mbps MAC Interface
– 16-Kbyte Frame Buffer
1 K-Byte Boot ROM, Embedding a Boot Program
– Enable Application Download from DataFlash
®
External Bus Interface
– On-chip 32-bit SDRAM Controller
– 4-Chip Select Static Memory Controller
Multi-level Priority, Individually Maskable, Vectored Interrupt Controller
Three 16-bit Timer/Counters
Two UARTs with Modem Control Lines
Serial Peripheral Interface (SPI)
Two PIO Controllers, Managing up to 48 General-purpose I/O Pins
Available in a 256-ball BGA Package
Power Supplies
– VDDIO 3.3V nominal
– VDDCORE and VDDOSC 1.8V nominal
-40°C to + 85°C Operating Temperature Range
Description
The AT91C140 is a member of the Atmel AT91 16- and 32-bit microcontroller family
based on the ARM7TDMI processor core. This processor has a high performance
32-bit RISC architecture with a high density 16-bit instruction set and very low power
consumption.
In addition, the AT91C140 integrates a double Ethernet 10/100 base-T MAC capable
of operating as an Ethernet bridge, thus making it ideally suited for networking appli-
cations. It supports a wide range of memory devices such as SDRAM, SRAM and
Flash and embeds an extensive array of peripherals.
The device is manufactured using Atmel’s high-density CMOS technology. By combin-
ing the ARM7TDMI processor core with an expansive assortment of peripheral
functions and low-power oscillators and PLL on a monolithic chip, the Atmel
AT91C140 is a powerful microcontroller that provides a highly flexible and cost effec-
tive solution to many networking applications.