Signal Descriptions
MOTOROLA
MPC821FADS-DB USER’S MANUAL
5-17
133
A2
A2
I, TS
Address line 2. Not used on this board.
134
GND
GND
—
135
A5
A5
I, TS
Address line 5. Not used on this board.
136
GND
GND
—
137
A1
A1
I, TS
Address line 1. Not used on this board.
138
GND
GND
—
139
A0
A0
I, TS
Address line 0. Not used on this board.
140
GND
GND
—
NOTE: I = Input, O = Output, L = Low, X = Don’t Care, OD = Open-Drain, and TS = Three-State.
Table 5-10. PM2 Interconnect Signals
PIN
MOTHERBOARD
SIGNAL
DAUGHTERBOARD
SIGNAL
INPUT/
OUTPUT
DESCRIPTION
1
V12
V12
O
10V output from voltage doubler. Used to
switch TMOS gates on the motherboard and
daughterboard. Should not be used for any
other purpose.
2
3
4
5
—
—
—
6
7
DSDI
DSDI
I/O
Debug Port Serial Data Input or JTAG Port
Serial Data Input. Used on the MPC8xxFADS
as a debug port serial data driven by the debug
port controller. If the ADI bundle is not
connected to the MPC8xxFADS, this signal
can be driven by the external debug / JTAG
port controller.
8
GND
GND
—
9
10
DSCK
DSCK
I/O
Debug Port Serial Clock input or JTAG Port
Serial Clock input. Used on the MPC8xxFADS
as a debug port serial clock driven by the
debug port controller. If the ADI bundle is not
connected to the MPC8xxFADS, this signal
can be driven by the external debug / JTAG
port controller.
11
DSDO
DSDO
I
Debug Port Serial Data Output or JTAG Port
Data Output. Used on the MPC8xxFADS as
debug port serial data. If the ADI bundle is not
connected to the MPC8xxFADS, this signal
can be used by the external debug / JTAG port
controller.
12
GND
GND
—
13
Table 5-9. PM1 Interconnect Signals (Continued)
PIN
MOTHERBOARD
SIGNAL
DAUGHTERBOARD
SIGNAL
INPUT/
OUTPUT
DESCRIPTION
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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