AM29243EH datasheet(4/36 Pages) AMD

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P R E L I M I N A R Y

Am29240 EH Microcontroller Series

™

GENERAL DESCRIPTION

The Am29240EH microcontroller series is an enhanced

bus-compatible extension of the Am29200

™ RISC mi-

crocontroller family, with two to four times the perfor-

mance.

The

Am29240EH

microcontroller

series

includes the Am29240EH microcontroller, the low-cost

Am29245EH microcontroller, and the Am29243EH data

microcontroller. The on-chip caches, MMU, faster inte-

ger math, and extended DMA addressing capability of

the Am29240EH microcontroller series allow the em-

bedded systems designer to provide increasing levels of

performance and software compatibility throughout a

range of products (see Table 1 on page 6).

Based on a low-voltage CMOS-technology design,

these devices offer a complete set of system peripherals

and interfaces commonly used in embedded applica-

tions. Compared to CISC processors, the Am29240EH

microcontroller series offers better performance, more

efficient use of low-cost memories, lower system cost,

and complete design flexibility for the designer. Coupled

with hardware and software development tools from the

AMD Fusion29K

r partners, the Am29240EH microcon-

troller series provides the embedded product designer

with the cost and performance edge required by today’s

marketplace.

For a complete description of the technical features, on-

chip peripherals, programming interface, register set,

and instruction set, please refer to the

Am29240EH,

Am29245EH, and Am29243EH RISC Microcontrollers

User’s Manual (order #17741).

Am29240EH Microcontroller

For general-purpose embedded applications, such as

mass-storage controllers, communications, digital sig-

nal processing, networking, industrial control, pen-

based systems, and multimedia, the Am29240EH

microcontroller provides a high-performance solution

with a low total-system cost. The memory interface of

the Am29240EH microcontroller provides even faster

direct memory access than the Am29200 microcontrol-

ler. This performance improvement minimizes the effect

of memory latency, allowing designers to use low-cost

memory with simpler memory designs. On-chip instruc-

tion and data caches provide even better performance

for time-critical code.

Other on-chip functions include: a ROM controller,

DRAM controller, peripheral interface adapter control-

ler, DMA controller, programmable I/O port, parallel port

controller, serial ports, and an interrupt controller.

Am29245EH Microcontroller

The low-cost Am29245EH microcontroller is designed

for embedded applications in which cost and space

constraints, along with increased performance require-

ments, are primary considerations.

The Am29245EH microcontroller also provides an easy

upgrade

path

for

Am29200,

Am29202

™, and

Am29205

™ microcontroller-based products.

Am29243EH Microcontroller

With DRAM parity support and a full MMU, the

Am29243EH data microcontroller is recommended for

communications applications that require high-speed

data movement and fast protocol processing in a fault-

tolerant environment.

Both the Am29243EH and Am29240EH microcontrol-

lers support fly-by DMA at 100 Mbytes/s for LANs and

switching applications, and a two-cycle Multiply Accu-

mulate function for DSP applications. The low power re-

quirements make either microcontroller a good choice

for field-deployed devices.

Development Support Products

The Fusion29K Program of Partnerships for Application

Solutions provides the user with a vast array of products

designed to meet critical time-to-market needs. Prod-

ucts/solutions available from the AMD Fusion29K part-

ners include the following:

Optimizing compilers for common high-level

languages

Assembler and utility packages

Source- and assembly-level software debuggers

Target-resident development monitors

Simulators

Execution boards

Hardware development tools

Silicon products

Board-level products

Laser-printer solutions

Multiuser, kernel, and real-time operating systems

Graphics solutions

Networking and communication solutions

Manufacturing support

Custom software consulting, support, and training

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