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MPC823e Mobile Computing Microprocessor

MOTOROLA

PCMCIA-ATA Controller

The PCMCIA-ATA interface is a master controller that is compliant with Version 2.1 of the

PCMCIA standard. The interface supports one independent PCMCIA socket with the required

external transceivers or buffers. It provides eight memory or I/O windows that can be allocated to

the socket. If the PCMCIA port is not being used as a card interface, it can provide eight

general-purpose pins and two output-only pins with interrupt capability.

Power Management

The MPC823e microprocessor supports a wide range of power management features, including

normal high, normal low, doze, sleep, deep-sleep, and power-down modes. In normal high mode,

the MPC823e is fully powered with all internal units operating at the full speed of the processor.

Normal low mode is the same as normal high, except it operates at a much lower frequency. There

is a doze mode determined by a clock divider that allows the operating system to reduce the

operational frequency of the processor.

Doze mode disables core functional units except the timebase, decrementer, PLL, memory

controller, real-time clock, LCD controller, and communication processor module. Sleep mode is

a lower power mode that disables everything except the real-time clock, timebase, decrementer,

and periodic interrupt timer, thus leaving the PLL active for quick wake-up. The deep-sleep mode

then disables the PLL for lower power, but slower wake-up. Power-down mode disables all logic

in the processor, except the minimum logic required to restart the device. It saves the most power,

but requires the longest wake-up time.

System Debug Support

The MPC823e microprocessor contains an advanced debug interface that provides superior debug

capabilities without any loss of speed. It supports six watchpoint pins that can be combined with

eight internal comparators, four of which operate on the effective address of the address bus. The

other four comparators are split—two comparators operate on the effective address on the data bus

and two comparators operate on the data on the data bus. The MPC823 microprocessor can

compare using the =,

π, <, and > conditions to generate watchpoints. Each watchpoint can then

generate a breakpoint that can be programmed to trigger in a programmable number of events.

Applications

The MPC823e microprocessor is specifically designed to be a general-purpose, low-cost entry

point to the Motorola embedded PowerPC Family for systems in which advanced GUIs,

communications, and high-level real-time operating systems are used. The device excels in

applications that require the performance of a single-issue PowerPC core with an ample amount of

data and instruction cache. It provides all the basic features of glueless memory connections along

with highly functional serial connectivity, a graphical LCD, and a video display controller. The

MPC823e excels in low-power and portable applications because of its extensive power-down

modes and low normal operation current.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com