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Interconnect Signals
8.1.9
P2—System Expansion Connector
P2 is a 128-pin, 90 0 , DIN 41612 connector that provides a minimal system I/F required to
interface various types of communication transceivers. This connector contains 16-bit
(lower PPC bus) address lines, 16-bit (higher PPC bus) data lines, plus useful GPCM and
UPM control lines. The pinout of P2 is shown in Table 8-8.
Table 8-8. P2 — System Expansion Connector
Pin No.
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
Signal Name
EXPA16
EXPA17
EXPA18
EXPA19
EXPA20
EXPA21
EXPA22
EXPA23
EXPA24
EXPA25
EXPA26
EXPA27
EXPA28
EXPA29
EXPA30
EXPA31
EXP12V
N.C.
EXP3.3V
Attribute
O
O
-
O
Description
Expansion Address (16 1 :31). This is a Latched-Buffered version of
the PowerQUICC II’s PPC Address lines (16:31), provided for
external tool connection. To avoid reflection these lines are series
terminated with 43 ? resistors.
These can be connected to the positive 12-V source from the PCI
edge connector thru J3. This line is fused by a 0.5A ressetable
poly-switch.
Not Connected.
3.3V Power Out. These lines are connected to the main 3.3V plane
of the PowerQUICC IIPCIAI-ADS, this, to provide 3.3V power
where necessary for external tool connected.
A22
A23
A24
A25
N.C.
-
Not connected.
Chapter 8. Support
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