P R E L I M I N A R Y
GENERAL DESCRIPTION
The 脡lanSC300 microcontroller is a highly integrated,
low-voltage, single-chip implementation of the
Am386SXLV microprocessor plus most of the addi-
tional logic needed for an AT-compatible personal com-
puter. It is ideal for embedded PC applications, such as
point-of-sale equipment, web appliances, industrial
controls, and communication equipment.
The 脡lanSC300 microcontroller from AMD is part of the
growing 脡lan family of mobile computing products,
which leverage existing AMD core modules. The
脡lanSC300 microcontroller demonstrates the feasibil-
ity of constructing highly integrated components built
from standard cores and getting these products to mar-
ket quickly.
The 脡lanSC300 microcontroller does this by combining
an Am386SXLV low-voltage microprocessor core with
a memory control unit, a Power Management Unit
(PMU), and the bus control and peripheral control logic
of a PC/AT-compatible computer. For more information
about the Am386 microprocessors, see the
Am386
庐
SX/SXL/SXLV Data Sheet
, order #21020 and
the
Am386
庐
DX/DXL Data Sheet
, order #21017.
For more information about the 脡lanSC310 microcon-
troller, see the
脡lan
TM
SC300 Microcontroller Program-
mer鈥檚 Reference Manual
, order #18470.
The 脡lanSC300 microcontroller includes a memory
controller that supports up to 16 Mbyte of DRAM, Flash
or ROM; power management functions; a bus control-
ler that supports local or ISA bus; a serial port controller
that is 16450 UART compatible; a bidirectional EPP-
compliant parallel port; a 146818A-compatible
real-time clock; internal phase-locked loops for clock
generation; and standard PC logic chips (8259A,
8237A, and 8254).
The 脡lanSC300 microcontroller鈥檚 true static design
and low operating voltage enable battery-powered op-
eration and lower weight for embedded PC applica-
tions. The internal core of the 脡lanSC300
microcontroller operates at 3.3 V and the I/O pads
allow either 3.3 V or 5 V operation. Lowering typical op-
erating voltage from 5 V to 3.3 V can dramatically re-
duce power consumption.
Functionally, the 脡lanSC300 microcontroller is a 100%
DOS/Windows-compatible, PC/AT-compatible com-
puter on a chip that is designed to furnish the customer
with a high-performance, low-power system solution,
providing state-of-the-art power management in a
small physical footprint.
The 脡lanSC300 microcontroller is available in both 25-
and 33-MHz versions, in a 208-lead Plastic Shrink
Quad Flat Pack (QFP) (PQR package) and a 208-lead
Thin Quad Flat Pack (TQFP) (PQL package).
Note:
Unless specified otherwise, the timings in this
data sheet are based on the 33-MHz version of the
脡lanSC300 microcontroller.
2
脡lan鈩C300 Microcontroller Data Sheet