Xilinx Virtex-4 LX Prototype Platform, Руководство пользователя

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14 www.xilinx.com Virtex-4 LX/SX Prototype Platform
UG078 (v1.2) May 24, 2006
Detailed Description
R
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
1 3 5 7 9 11 13 15 17 19
2 4 6 8 10 12 14 16 18 20
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
1 3 5 7 9 11 13 15 17 19
2 4 6 8 10 12 14 16 18 20