ICS SB686P Series, Product Manual

Page: 38 / 126

Manual Number: 40110-005-2 Page 28
PCI Local Bus Pin Assignments
The PCI Local Bus specifies both 5-volt and 3.3-volt signaling environments. The bus pin assign-
ments shown below are for the 5-volt connector. The 3.3-volt connector bus pin assignments are
the same with the following exceptions:
* The pins noted as +V (I/O) are +5 volts or +3.3 volts, depending on which connector is being
used.
† Pins B12, B13, A12 and A13 are Gnd (ground) on the 5-volt connector, but are Connector Keys
on the 3.3-volt connector.
†† Pins B50, B51, A50 and A51 are Connectors Keys on the 5-volt connector, but are Gnd (ground)
on the 3.3-volt connector.
I/O Pin Signal Name
B1 -12V
B2 TCK
B3 Gnd
B4 TDO
B5 +5V
B6 +5V
B7 INTB#
B8 INTD#
B9 PRSNT1#
B10 Reserved
B11 PRSNT1#
B12 Gnd †
B13 Gnd †
B14 Reserved
B15 Gnd
B16 CLK
B17 Gnd
B18 REQ#
B19 +V (I/O)
B20 AD31
B21 AD29
B22 Gnd
I/O Pin Signal N am e
A1 TRST#
A2 +12V
A3 TMS
A4 TDI
A5 +5V
A6 INTA#
A7 INTC#
A8 +5V
A9 Reserved
A10 +V (I/O)
A11 Reserved
A12 Gnd †
A13 Gnd †
A14 Reserved
A15 RST#
A16 +V (I/O)
A17 GNT#
A18 Gnd
A19 Reserved
A20 AD30
A21 +3.3V
A22 AD28