Signal Descriptions
5-34
MPC821FADS-DB USER’S MANUAL
MOTOROLA
5.1.4 PX1 to PX4—Hardware Expansion Connectors
These connectors are receptacle interboard connectors manufactured by Molex. They are
identical to those on the MPC8xxFADS motherboard and their mechanical assembly is
similar as well.
In principle, the expansion connectors are identical in signal assignment to the motherboard
connectors. However, there is a difference between PM3 and PX3, which is a result of the
134
—
—
—
Not connected.
135
136
GND
GND
—
137
138
—
—
—
Not connected.
139
140
GND
GND
—
NOTE: I = Input, O = Output, L = Low, and X = Don’t Care.
Figure 5-2. Expansion Connectors Mechanical Assembly
Table 5-12. PM4 Interconnect Signals (Continued)
PIN
MOTHERBOARD
SIGNAL
DAUGHTERBOARD
SIGNAL
INPUT/
OUTPUT
DESCRIPTION
1
1
1
1
PX1
PX4
PX2
PX3
17.09mm
10.74mm
29.79mm
93.98mm
71.12mm
47.1mm
13.28mm
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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