Specifications

CHAPTER 3
I/O Specifications
PCI Connector 43
A21, A27, A33,
A39, A45, A53,
B25, B31, B36,
B41, B43, B54
Not connected
(+3.3 V)
On the 12" and 7" cards, these pins are not
connected. On the PCI bus, they are connected to
the +3.3 V power supply.
A40 Not connected
(SDONE)
On the 12" and 7" cards, this pin is not connected.
On the PCI bus, it is used for Snoop Done, which
indicates the status of the snoop operation for the
current cache access.
A41 Not connected
(SBO L)
On the 12" and 7" cards, this pin is not connected.
On the PCI bus, it is used for Snoop Backoff,
which indicates a hit to a modified cache line.
A60 Not connected
(REQ64 L)
On the 12" and 7" cards, this pin is not connected.
On the PCI bus, it is used for Request 64-bit
Transfer, which indicates the bus master’s desire
to transfer data in 64-bit blocks.
B4 Not connected
(TDO)
On the 12" and 7" cards, this pin is not connected.
On the PCI bus, it is used for Test Data Output,
which serially shifts test data and test
instructions out of the PCI card during TAP
operations.
B7 Not connected
(INTB L)
On the 12" and 7" cards, this pin is not connected.
On the PCI bus, it is used for Interrupt B, which
requests an interrupt and is only used on a
multifunction device.
B8 Not connected
(INTD L)
On the 12" and 7" cards, this pin is not connected.
On the PCI bus, it is used for Interrupt D, which
requests an interrupt and is only used on a
multifunction device.
B9 Not connected
(PRSNT1 L)
On the 12" and 7" cards, this pin is not connected.
On the PCI bus, it is used for Present 1, which, in
conjunction with Present 2 (pin B11), indicates
the presence of a PCI card in the PCI slot and
indicates the power requirements for the card.
Present 2 is grounded and Present 1 is open,
indicating the presence of a PCI card with a 15 W
maximum power requirement.
Table 3-2 PCI connector pin assignments (continued)
Pin number Signal Description