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Chapter 3
Pin #
Signal
25 (A25)
GNT1*
26 (A26)
+5V
27 (A27)
CLK2
28 (A28)
GND
29 (A29)
+12V
30 (A30)
-12V
31 (B1)
NC
32 (B2)
AD02
33 (B3)
GND
34 (B4)
AD07
35 (B5)
AD09
36 (B6)
VI/O
37 (B7)
AD13
38 (B8)
C/BE1*
39 (B9)
GND
40 (B10)
PERR*
41 (B11)
+3.3V
42 (B12)
TRDY*
43 (B13)
GND
44 (B14)
AD16
45 (B15)
+3.3V
46 (B16)
AD20
47 (B17)
AD23
48 (B18)
GND
49 (B19)
C/BE3*
50 (B20)
AD26
51 (B21)
+5V
52 (B22)
AD30
53 (B23)
GND
54 (B24)
REQ2*
55 (B25)
VI/O
56 (B26)
CLK0
57 (B27)
+5V
58 (B28)
INTD*
59 (B29)
INTA*
26
Input/
Description
Output
T/S
Grant 1 – These signal (GNT 0-2) lines indicate access has been
granted to the requesting device (PCI Masters).
+5 volts ±5% power supply input
Clock 2 – These clocks (CLK 0-3) provide timing outputs for four
In
external PCI devices and all timing transactions on the PCI bus.
Ground
+12 volts ±5% power supply input
-12 volts (Supplied externally or through PC/104-Plus bus)
Not connected (Reset)
T/S
Address/Data Bus Line 2 – Refer to pin A3 for more information.
Ground
T/S
Address/Data Bus Line 7 – Refer to pin A3 for more information.
T/S
Address/Data Bus Line 9 – Refer to pin A3 for more information.
+5 volts ±5% (Reference voltage only)
T/S
Address/Data Bus Line 13 – Refer to pin-A3 for more information.
T/S
Command/Byte Enable 1 – Refer to pin-A4 for more information.
Ground
Parity Error – This signal is for reporting data parity errors.
+3.3 volts ±5% power supply input
S/T/S
Target Ready – This signal indicates the selected device's ability to
complete the current cycle of transaction. Both IRDY* and TRDY*
must be asserted to terminate a data cycle.
Ground
T/S
Address/Data Bus Line 16 – Refer to pin-A3 for more information.
+3.3 volts ±5% power supply input
T/S
Address/Data Bus Line 20 – Refer to pin-A3 for more information.
T/S
Address/Data Bus Line 23 – Refer to pin-A3 for more information.
Ground
T/S
Command/Byte Enable 3 – Refer to pin-A4 for more information.
T/S
Address/Data Bus Line 26 – Refer to pin-A3 for more information.
+5 volts ±5% power supply input
T/S
Address/Data Bus Line 30 – Refer to pin-A3 for more information.
Ground
T/S
Bus Request 2 – Refer to pin-A23 for more information.
+5 volts ±5% (Reference voltage only)
In
Clock 0 – Refer to pin-A27 for more information
+5 volts ±5% power supply input
O/D
Interrupt D – This signal is used to request interrupts only for multi-
function devices.
O/D
Interrupt A – This signal is used to request an interrupt.
Reference Manual
Hardware
LittleBoard 800
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