Am186™CU
High-Performance, 80C186-Compatible
16-Bit Embedded USB Microcontroller
DISTINCTIVE CHARACTERISTICS
■ E86™ family of x86 embedded processors
■ Memory and Peripheral Interface
offers improved time-to-market
– Integrated DRAM controller
– Software migration (backwards- and upwards-
compatible)
– Glueless interface to RAM/ROM/Flash memory
(55-ns Flash memory required for zero-wait-state
operation at 50 MHz)
– World-class development tools, applications, and
system software
– Fourteen chip selects (8 peripherals, 6 memory)
– External bus mastering support
■ Serial Communications Peripherals
– Universal Serial Bus (USB) peripheral controller
– High-Speed UART with autobaud
– UART
– Multiplexed and nonmultiplexed address/data bus
– Programmable bus sizing
– 8-bit boot option
– Synchronous serial interface (SSI)
– SmartDMA™ channels (4) to support USB
■ System Peripherals
■ Available in the following package:
– 160-pin plastic quad flat pack (PQFP)
– 25-, 40-, and 50-MHz operating frequencies
– Low-voltage operation, VCC = 3.3 V ± 0.3 V
– Commercial and industrial temperature rating
– 5-V-tolerant I/O (3.3-V output levels)
– Three programmable 16-bit timers
– Hardware watchdog timer
– General-purpose DMA (4 channels)
– Programmable I/O (48 PIO signals)
– Interrupt Controller (36 maskable interrupts)
GENERAL DESCRIPTION
The Am186™CU USB microcontroller is a member of
AMD’s Comm86™ family of communications-specific
microcontrollers. The microcontroller is a derivative of
the Am186CC communications controller and is pin-
compatible with that device.
Built into the Am186CU USB microcontroller is a wide
range of communications features required in many
communications applications, including the Universal
Serial Bus (USB) peripheral controller that designers
can use to implement a variety of microcontroller-
based USB peripheral devices for telephony, audio, or
other high-end applications. The USB controller does
not support USB host or hub functions, but the
Am186CU USB microcontroller can be used to
implement USB peripheral functions in a device that
also contains separate USB hub circuitry.
The Am186CU USB microcontroller is a cost-effective,
high-performance microcontroller solution for
communications applications. This highly integrated
microcontroller enables customers to save system
costs and increase performance over 8-bit
microcontrollers and other 16-bit microcontrollers.
Comprehensive development support is available from
AMD and its FusionE86SM partners. A customer
development platform board is available. AMD and its
FusionE86 partners also offer boards, schematics,
drivers, protocol stacks, and routing software to enable
fast time to market.
The microcontroller offers the advantages of the x86
development environment’s widely available native
development tools, applications, and system software.
Additionally, the microcontroller uses the industry-
standard 186 instruction set that is part of the AMD
E86™ family, which continually offers instruction-set-
compatible upgrades.
© Copyright 2000 Advanced Micro Devices, Inc. All rights reserved.
Publication# 22025 Rev: B Amendment/0
Issue Date: May 2000
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