Signal Descriptions
5-24
MPC821FADS-DB USER’S MANUAL
MOTOROLA
12
GND
GND
—
13
14
PC8
PC8
I/O, X
Port C Bit 8. Also appears at P8, but is
otherwise unused.
15
PA11
PA11
I/O, X
Port A Bit 11. Also appears at P8, but is
otherwise unused.
16
GND
GND
—
17
PA10
PA10
I/O, X
Port A Bit 10. Also appears at P8, but is
otherwise unused.
18
GND
GND
—
19
20
PC7
PC7
I/O, X
Port C Bit 7. Also appears at P8, but is
otherwise unused.
21
PA9
PA9
I/O, X
Port A Bit 9. Also appears at P8, but is
otherwise unused.
22
GND
GND
—
23
PA8
PA8
I/O, X
Port A Bit 8. Also appears at P8, but is
otherwise unused.
24
GND
GND
—
25
26
PC13
PC13
I/O, X
Port C Bit 13. Also appears at P8, but is
otherwise unused.
27
ETHTCK
ETHTCK
O, X
Ethernet Port Transmit Clock signal. When the
Ethernet port is disabled via the BCSR1, this
signal is three-stated. Also appears at P8.
28
GND
GND
—
29
ETHRCK
ETHRCK
O, X
Ethernet Port Receive Clock signal. When the
Ethernet port is disabled via the BCSR1 , this
signal is three-stated. Also appears at P8.
30
GND
GND
—
31
32
USBSPD
—
O, X
Unused on this board.
33
PB31
PB31
I/O, X
Port B Bit 31. Also appears at P8, but is
otherwise unused.
34
BINPAK
BINPAK
I/O
PCMCIA Port Input Port Acknowledge signal.
PC15/DREQ1/RTS1/L1ST1 on the MPC821.
When the PCMCIA port is disabled via the
BCSR1, this signal can be used off-board for
another function.
35
PB30
PB30
I/O, X
Port B Bit 30. Also appears at P8, but is
otherwise unused.
36
GND
GND
—
37
PB29
PB29
I/O, X
Port B Bit 29. Also appears at P8, but is
otherwise unused.
Table 5-11. PM3 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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