Specifications

Chapter 3 Hardware
LittleBoard 800 Reference Manual 27
Pin # Signal Input/
Output
Description
60 (B30) REQ3* T/S Bus Request 3 – Refer to pin-A23 for more information.
61 (C1) +5V +5 volts ±5% power supply input
62 (C2) AD01 T/S Address/Data Bus Line 1 – Refer to pin-A3 for more information.
63 (C3) AD04 T/S Address/Data Bus Lines 4 – Refer to pin-A3 for more information.
64 (C4) GND Ground
65 (C5) AD08 T/S Address/Data Bus Line 8 – Refer to pin-A3 for more information.
66 (C6) AD10 T/S Address/Data Bus Line 10 – Refer to pin-A3 for more information.
67 (C7) GND Ground
68 (C8) AD15 T/S Address/Data Bus Line 15 – Refer to pin-A3 for more information.
69 (C9) NC Not connected (Snoop Backoff)
70 (C10) +3.3V +3.3 volts ±5% power supply input
71 (C11) LOCK* S/T/S Lock – This signal indicates an operation that may require multiple
transactions to complete
72 (C12) GND Ground
73 (C13) IRDY* S/T/S Initiator Ready – This signal indicates the master’s ability to
complete the current data cycle of the transaction
74 (C14) +3.3V +3.3 volts ±5% power supply input
75 (C15) AD17 T/S Address/Data Bus Line 17 – Refer to pin-A3 for more information.
76 (C16) GND Ground
77 (C17) AD22 T/S Address/Data Bus Line 22 – Refer to pin-A3 for more information.
78 (C18) IDSEL1 Initialization Device Select 1 – Refer to pin-A18 for more information
79 (C19) VI/O +5 volts ±5% (Reference voltage only)
80 (C20) AD25 T/S Address/Data Bus Line 25 – Refer to pin-A3 for more information.
81 (C21) AD28 T/S Address/Data Bus Line 28 – Refer to pin-A3 for more information.
82 (C22) GND Ground
83 (C23) REQ1* T/S Bus Request 1 – Refer to pin-A23 for more information.
84 (C24) +5V +5 volts ±5% power supply input
85 (C25) GNT2* T/S Grant 2 – Refer to pin-A25 for more information
86 (C26) GND Ground
87 (C27) CLK3 In Clock 3 – Refer to pin-A27 for more information
88 (C28) +5V +5 volts ±5% power supply input
89 (C29) INTB* O/D Interrupt B – This signal is used to request interrupts only for multi-
function devices.
90 (C30) GNT3* T/S Grant 3 – Refer to pin-A25 for more information
91 (D1) AD00 T/S Address/Data Bus Line 0 – Refer to pin-A3 for more information.
92 (D2) +5V +5 volts ±5% power supply input
93 (D3) AD03 T/S Address/Data Bus Line 3 – Refer to pin-A3 for more information.
94 (D4) AD06 T/S Address/Data Bus Line 6 – Refer to pin-A3 for more information.
95 (D5) GND Ground
96 (D6) M66EN Not supported – Reserved for 66MHz on PCI bus.