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Avnet Design Services
21 of 25
Rev 1.0 06/08/2004
Released
Literature # ADS-xxxx04
3.7 PCI/PCIX
The Virtex-II board PCI/PCI-X interfaces to a PCI bus and hence the outside world. The Virtex-II FPGA is connected
to the PCI/PCI-X bus and provides control functions provided that the Xilinx PCI-X LogiCORE is implemented. (Xilinx
PCI-X LogiCORE not included).
The PCI-X bus interface is designed as a +3.3V/+5V, 64-Bit, 66/100MHz interface compatible with PCI/PCI-X per
standard PCI LOCAL BUS SPECIFICATION Revision 2.1S. A standard PCI connector is implemented to provide a
card connection to PC platform. The Virtex-II™ device is placed as close as possible to the PCI connectors to facilitate
clock/signal routing consistent with the requirements imposed by the PCI 2.1S. All PCI functionality is provided by
Virtex-II firmware. ±12V power available from the PCI bus is not used.
If the PCI/PCI-X interface is not required, this board may be plugged into a mating receptacle and the 87 dedicated
Virtex-II I/O lines may be used for other applications. The bus is intended to provide adequate bandwidth for a customer
to implement a usable PCI/PCI-X interface at the Virtex-II data rates. It is intended, for example, to be an integral
interface to a high-end workstation as part of the final product. That is, the final product implements 64 bit PCI/PCI-X.
It is not intended as a low bandwidth control port to allow designers the convenience of placing the board in a PC at their
desk for emulation. If the end application is a +3.3V OR +5V, 64/66/100 PCI/PCI-X, then the customer will likely have
a suitable test bed available. See Table 12 for the PCI Connector Pin assignment.
PCI SIGNAL PCI PIN # PCI SIGNAL
PCI
PIN #
PCI
SIGNAL
PCI PIN #
-12V B1
GND B34
C/BE[6]# B65
TRST# A1
FRAME# A34
C/BE[5]# A65
TCK B2
IRDY# B35
C/BE[4]# B66
+12V A2
GND A35
n/c A66
GND B3
+3.3V B36
GND B67
TMS A3
TRDY# @
A36
PAR64 A67
TDO B4
DEVSEL# @
B37
AD[63] B68
TDI A4
GND A37
AD[62] A68
+5V B5
PCIXCAP B38
AD[61 B69
+5V A5
STOP# @
A38
GND A69
+5V B6
LOCK B39
n/c B70
INTA# A6
+3.3V A39
AD[60] A70
INTB# B7
PERR# @
B40
AD[59] B71
INTC# A7
SDONE A40
AD[58] A71
INTD# B8
+3.3V B41
AD[57] B72
+5V A8
SBO# A41
GND A72
PRSNT1# B9
SERR# B42
GND B73
n/c A9
GND A42
AD[56] A73
n/c B10
+3.3V B43
AD[55] B74
n/c A10
PAR A43
AD[54] A74
PRSNT2# B11
C/BE[1]# B44
AD[53] B75
n/c A11
AD[15] A44
n/c A75
n/c B14
AD[14] B45
GND B76
n/c A14
+3.3V A45
AD[52] A76
GND B15
GND B46
AD[51] B77
RST# A15
AD[13] A46
AD[50] A77
CLK B16
AD[12] B47
AD[49] B78
n/c A16
AD[11] A47
GND A78
GND B17
AD[10] B48
n/c B79
GNT# A17
GND A48
AD[48] A79
REQ# B18
M66EN B49
AD[47] B80
GND A18
AD[09] A49
AD[46] A80
n/c B19
GND B50
AD[45] B81
n/c A19
GND A50
GND A81
AD[31] B20
GND B51
GND B82
AD[30] A20
GND A51
AD[44] A82