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Virtex-II Pro Prototype Platform User Guide
1-800-255-7778
UG027 / PN 0402044 (v1.6) October 25, 2002
Chapter 1: Virtex-II Pro Prototype Platform
R
5b. Downstream System ACE Connector
The Downstream System ACE connector, as shown in
Figure 1-5
, is used to pass
configuration information to a DUT in a downstream prototype platform from sources
such as a Parallel Cable III cable or an Upstream System ACE connector.
6. Prototyping Area
The prototyping area accommodates 0.10" spaced ICs. The kit contains headers that can be
soldered to the breakout area, if desired. Power and ground buses are located at the top
and bottom, respectively, of the prototyping area.
7. V
CCO
Enable Supply Jumpers
Virtex-II Pro series devices have eight SelectI/O banks, labeled 0 through 7, each with a
V
CCO
enable supply jumper. V
CCO
enable supply jumpers can connect each bank to one of
the two onboard supplies, V
CCINT
or the V
CCO
supply. These jumpers must be installed for
the Virtex-II Pro device to function normally.
8. VBATT
An onboard battery holder is connected to the VBATT pin of the DUT. If an external power
supply is used, the associated jumper must be removed. Select a 12 mm lithium coin
battery (3V), such as part numbers BR1216, CR1216, and BR1225 from Panasonic or any
other appropriate 12 mm lithium coin battery (3V).
9. Oscillator Sockets
The prototype board has four crystal oscillator sockets, all wired for standard LVTTL-type
oscillators. These sockets connect to the DUT clock pads as shown in
Table 1-4, page 19
.
Onboard termination resistors can be changed by the user. The oscillator sockets accept
both half- and full-sized oscillators and are powered by a 2.5V power supply.
Figure 1-5:
Downstream System ACE Connector, 20-Pin Male
UG027_05_030402
DOWNSTREAM_TDO
GND
DOWNSTREAM_TCK
GND
V5
NC
DOWNSTREAM_TMS
GND
DOWNSTREAM_TDI
GND
GND
V5
V5
V5
V5
VCC3_EN
VCC3_EN
VCC3_EN
VCC3_EN
GND
1
3
5
7
9
11
13
15
17
19
2
4
6
8
10
12
14
16
18
20
