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Features and Performance
1-1
CHAPTER
1
FEATURES AND PERFORMANCE
Compared to the 80C186/188 microcontrollers, the Am186™ER and Am188™ER
microcontrollers enable designers to increase performance and functionality, while reducing
the cost, size, and power consumption of embedded systems. The Am186ER and Am188ER
microcontrollers are cost-effective, enhanced versions of the AMD 80C186/188 devices.
The Am186ER and Am188ER microcontrollers deliver 80C186/188 compatibility plus
32 Kbyte of integrated memory, increased performance, reduced power consumption,
serial communications, and a glueless bus interface. Developed exclusively for the
embedded marketplace, the Am186ER and Am188ER microcontrollers increase the
performance of existing 80C186/188 systems while decreasing their cost.
Because the Am186ER and Am188ER microcontrollers integrate memory, on-chip
peripherals, and system logic and offer up to twice the performance of an 80C186/188,
they are ideal solutions for customers who need to enhance and cost-reduce their present
x86 designs.
1.1 KEY FEATURES AND BENEFITS
The Am186ER and Am188ER microcontrollers extend the AMD family of microcontrollers
based on the industry-standard x86 architecture. Upgrading to the Am186ER or Am188ER
microcontrollers is attractive for the following reasons:
n Minimized total system cost—The new on-chip RAM, peripherals, and system-interface
logic nearly eliminate the need for external devices, reducing the overall system cost of new
or existing 80C186/188 designs.
n Integrated RAM—32 Kbyte of internal RAM ensures a low-cost supply of memory and
also a smaller form factor and lower power consumption for system designs. The internal
memory provides the same performance as external zero-wait-state RAM devices.
n Enhanced performance—The Am186ER and Am188ER microcontrollers offer up to
40-MHz operation, which requires only a 10-MHz input clock. The nonmultiplexed
address bus offers faster, unbuffered access to memory.
n Zero-wait-state operation—Enhanced bus timing permits zero-wait-state operation at
40 MHz with internal RAM or inexpensive 70-ns memories.
n 3.3-V supply voltage with 5-V-tolerant I/O—The Am186ER and Am188ER
microcontrollers use a 3.3-V supply over the entire range of operating frequencies,
increasing the performance of one-supply 3.3-V systems while preserving much lower
power consumption when compared to 5-V operation. The 5-V-tolerant I/O
accommodates existing 5-V designs.
n Enhanced functionality—The new and enhanced on-chip peripherals include an
asynchronous serial port, a virtual watchdog timer, an additional interrupt pin, a high-
speed synchronous serial interface, a PSRAM controller, a 16-bit Reset Configuration
Register, enhanced chip-select functionality, and 32 programmable I/Os.
n x86 software compatibility—The Am186ER and Am188ER microcontrollers are
80C186/188-compatible and upward-compatible with the AMD E86 family.