Interconnect Signals
Table 8-8. P2 — System Expansion Connector (continued)
Pin No.
C12
Signal Name
IRQ7#
Attribute
I
Description
Interrupt Request 7 (L). Connected to PowerQUICC II‘s
DP7/CSE1/IRQ7# signal. Pulled up on the ADS with a 10 K ?
resistor. This line is shared with the Fast Ethernet transceiver’s
interrupt line and therefore, when driven by an external tool, MUST
be driven with an Open Drain gate. Failure to do so might
result in permanent damage to the PowerQUICC II and / or to
ADS logic.
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24
C25
C26
C27
C28
C29
C30
GND
EXPD0
EXPD1
EXPD2
EXPD3
EXPD4
EXPD5
EXPD6
EXPD7
EXPD8
EXPD9
EXPD10
EXPD11
EXPD12
EXPD13
EXPD14
EXPD15
N.C.
O
I/O, T.S.
-
Digital Ground. Connected to main GND plane of the ADS.
Expansion data (0 1 :15). This double-buffered version of the PPC
bus D(0:15) lines is controlled by on-board logic. These lines are
driven only if BTOOLCS1# or BTOOLCS2# are asserted.
Otherwise they are tristated.
The direction of these lines is determined by buffered BCTL0, in
function of W/R#.
Not connected
C31
C32
D1
GND
O
Digital ground. Connected to main GND plane of the ADS.
D2
D3
MPC8272ADS User Guide
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