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Chapter 3
Pin #
Signal
106 (D16) AD19
107 (D17) +3.3V
108 (D18) IDSEL2
109 (D19) IDSEL3
110 (D20) GND
111 (D21) AD27
112 (D22) AD31
113 (D23) VI/O
114 (D24) GNT0*
115 (D25) GND
116 (D26) CLK1
117 (D27) GND
118 (D28) RST*
119 (D29) INTC*
120 (D30) GND
Notes: The shaded area denotes power or ground. The signals marked with * = Negative true logic.
The Input/Output signals in this table refer to the input/output signals listed in the PCI Local Bus
Manual, Revision 2.2, Chapter 2, paragraph 2.1, Signal definitions. The following terms or
acronyms are used in this table:
•
In – Input is standard input only signal
•
Out – Totem Pole output is a standard active driver
•
T/S – Tri-State is a bi-directional input output pin
•
S/TS – Sustained Tri-State is an active low tri-state signal driven by one and only one
agent at a time
•
O/D – Open Drain allows multiple devices to share as a wire-OR.
LittleBoard 700
Input/
Description
Output
T/S
PCI Address and Data Bus Line 19 – Refer to Pin 3 for more
information.
+3.3 volts ±5% power supply
Initialization Device Select 2 – Refer to Pin 18 for more
information.
Initialization Device Select 3 – Refer to Pin 18 for more
information.
Digital Ground
T/S
PCI Address and Data Bus Line 27 – Refer to Pin 3 for more
information.
T/S
PCI Address and Data Bus Line 31 – Refer to Pin 3 for more
information.
+5 volts ±5% power supply
T/S
Grant 0 – Refer to Pin 25 for more information.
Digital Ground
In
PCI clock 1 – Refer to Pin 27 for more information
Digital Ground
In
PCI bus reset – This signal is an output signal to reset the entire
PCI Bus. This signal will be asserted during system reset
O/D
Interrupt C – This signal is used to request interrupts only for multi-
function devices.
Digital Ground
Reference Manual
Hardware
29
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