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14 www.xilinx.com Virtex-4 LX/SX Prototype Platform
UG078 (v1.2) May 24, 2006
Detailed Description
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6a. Upstream System ACE Interface Connector
The upstream System ACE interface connector, as shown in Figure 4, can be used to
configure the DUT. Any JTAG configuration stream can source this connector. For
example, a System ACE controller with a CompactFlash card can be used to generate very
large JTAG streams for configuring multiple Virtex-4 prototype platforms using the
downstream System ACE interface connector.
6b. Downstream System ACE Interface Connector
The downstream System ACE interface connector, as shown in Figure 5, is used to pass
configuration information to a DUT in a downstream prototype platform board from
sources such as a Parallel Cable III cable or an upstream System ACE interface connector.
Figure 4: Upstream System ACE Interface Connector (20-Pin Female)
UG078_04_051004
NC
UPSTREAM_TMS
GND
UPSTREAM_TDI
GND
VCC_TMP
GND
UPSTREAM_TCK
GND
UPSTREAM_TDO
GND
VCC3_EN
VCC3_EN
VCC3_EN
VCC3_EN
VCC_TMP
VCC_TMP
VCC_TMP
VCC_TMP
GND
135791113151719
2468101214161820
Figure 5: Downstream System ACE Interface Connector (20-Pin Male)
UG078_05_051004
DOWNSTREAM_TDO
GND
DOWNSTREAM_TCK
GND
VCC_TMP
NC
DOWNSTREAM_TMS
GND
DOWNSTREAM_TDI
GND
GND
VCC_TMP
VCC_TMP
VCC_TMP
VCC_TMP
VCC3_EN
VCC3_EN
VCC3_EN
VCC3_EN
GND
135791113151719
2468101214161820