Specifications

Chapter 3 Hardware
ReadyBoard 800 Reference Manual 29
Pin # Signal Input/
Output
Description
106 (D16) AD19 T/S
PCI Address and Data Bus Line 19 – See Pin 3 for more
information.
107 (D17) +3.3V +3.3 volts ±5%
108 (D18) IDSEL2 Initialization Device Select 2 – See Pin 18 for more information.
109 (D19) IDSEL3 Initialization Device Select 3 – See Pin 18 for more information.
110 (D20) GND Ground
111 (D21) AD27 T/S
PCI Address and Data Bus Line 27 – See Pin 3 for more
information.
112 (D22) AD31 T/S
PCI Address and Data Bus Line 31 – See Pin 3 for more
information.
113 (D23) VI/O +5 volts – Reference voltage
114 (D24) GNT0* T/S Grant 0 – See Pin 25 for more information.
115 (D25) GND Ground
116 (D26) CLK1 In PCI clock 1 – See Pin 27 for more information
117 (D27) GND Ground
118 (D28) RST* In PCI bus reset – This signal is an output signal to reset the entire
PCI Bus. This signal will be asserted during system reset
119 (D29) INTC* O/D
Interrupt C – This signal is used to request interrupts only for
multi-function devices.
120 (D30) GND Ground
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 2.3, 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/T/S – 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.
NOTE One request signal (pin 54 or B24, REQ2) and one grant line (pin 85
or C25, GNT2) are not available to other cards/devices when the
MiniModule ISA expansion board is used. These signal lines are
reserved for the MiniModule ISA board, if jumper JP1 is enabled..