Ampro Corporation XTX 820 User Manual
Page 29
Chapter 3
Hardware
XTX 820
Reference Manual
23
J1
Pin #
Signal
PCI
Pin #
Description
49
CBE1*
106 (B44) Bus Command and Byte Enable 1 – Refer to pin-52 (A52) for more
information.
45
AD14
107 (B45) Address/Data bus 14 – Refer to Pin-20 (A20) for more information
GND
108 (B46) Ground
41
AD12
109 (B47) Address/Data bus 12 – Refer to Pin-20 (A20) for more information
37
AD10
110 (B48) Address/Data bus 10 – Refer to Pin-20 (A20) for more information
NC
66 MHz/
Ground
111 (B49) 66 MHz Enable – This signal indicates to a device if the bus segment
is operating at 66 or 33 MHz.
Ground – If this pin is not used for 66 MHz operation, it is at ground
potential.
GND
112 (B50) Ground for +3.3V boards
GND
113 (B51) Ground for +3.3V boards
33
AD08
114 (B52) Address/Data bus 08 – Refer to Pin-20 (A20) for more information
32
AD07
115 (B53) Address/Data bus 07 – Refer to Pin-20 (A20) for more information
+3.3V
116 (B54) +3.3 Volt Power
30
AD05
117 (B55) Address/Data bus 05 – Refer to Pin-20 (A20) for more information
28
AD03
118 (B56) Address/Data bus 03 – Refer to Pin-20 (A20) for more information
Ground
119 (B57) Ground
25
AD01
120 (B58) Address/Data bus 01 – Refer to Pin-20 (A20) for more information
+3.3V(I/O) 121 (B59) +3.3V I/O
NC
ACK64*
122 (B60) Acknowledge 64-bit Transfer – This signal indicates the target is
willing to transfer data using 64 bits. Not used in 32-bit system.
NC
+5V
123 (B61) +5 Volt Power
NC
+5V
124 (B62) +5 Volt Power
Notes: The shaded area denotes power or ground. The signals marked with * = Negative true logic.