MC94MX21 Datasheet, PDF (3/98 Pages) Freescale Semiconductor, Inc – 333 and 350 MHz

Introduction
• A pin is an external physical connection. The same pin can be used to connect a number of signals.
• Asserted means that a discrete signal is in active logic state.
— Active low signals change from logic level one to logic level zero.
— Active high signals change from logic level zero to logic level one.
• Negated means that an asserted discrete signal changes logic state.
— Active low signals change from logic level zero to logic level one.
— Active high signals change from logic level one to logic level zero.
• LSB means least significant bit or bits, and MSB means most significant bit or bits. References to low and
high bytes or words are spelled out.
• Numbers preceded by a percent sign (%) are binary. Numbers preceded by a dollar sign ($) or 0x are
hexadecimal.
1.2 Target Applications
The i.MX21 is targeted for advanced information appliances, smart phones, Web browsers, digital MP3
audio players, handheld computers based on the popular Palm OS platform, and messaging applications.
1.3 Reference Documentation
The following documents are required for a complete description of the i.MX21 and are necessary to
design properly with the device. Especially for those not familiar with the ARM926EJ-S processor the
following documents are helpful when used in conjunction with this manual.
ARM Architecture Reference Manual (ARM Ltd., order number ARM DDI 0100)
ARM7TDMI Data Sheet (ARM Ltd., order number ARM DDI 0029)
ARM920T Technical Reference Manual (ARM Ltd., order number ARM DDI 0151C)
MC9328MX21 Product Brief (order number MC9328MX21P)
MC9328MX21 Reference Manual (order number MC9328MX21RM)
The Freescale manuals are available on the Freescale Semiconductor Web site at http://
www.freescale.com. These documents may be downloaded directly from the Freescale Web site, or printed
versions may be ordered. The ARM Ltd. documentation is available from http://www.arm.com.
1.4 Ordering Information
Table 1 provides ordering information for the device. See Table 4 on page 14 for core frequency and
supply voltage requirements.
Table 1. Ordering Information
Part Order Number
MC94MX21DVKN3
Package Size
289-lead MAPBGA
0.65mm, 14mm x 14mm
Package Type
Lead-free
Operating Range
-30°C–70°C
MC94MX21 Technical Data, Rev. 1.4
Freescale Semiconductor
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