Xilinx UG078 manual 6a. Upstream System ACE Interface Connector, Detailed Description

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.

UPSTREAM_TDO

GND

UPSTREAM_TCK

GND

VCC_TMP

19 17 15 13 11 9

7

5

3

1

GND UPSTREAM_TDI GND UPSTREAM_TMS NC

VCC_TMP VCC_TMP VCC_TMP VCC_TMP GND

20 18 16 14 12 10 8

6

4

2

VCC3_EN

VCC3_EN

VCC3_EN

VCC3_EN

GND UG078_04_051004

Figure 4: Upstream System ACE Interface Connector (20-Pin Female)

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.

GND

VCC_TMP

VCC_TMP

VCC_TMP

VCC_TMP

VCC_TMP GND DOWNSTREAM_TCK GND DOWNSTREAM_TDO

GND

VCC3_EN

VCC3_EN

VCC3_EN

VCC3_EN

20 18 16 14 12 10 8		6	4	2
19 17 15 13 11 9	7	5	3	1

NC

DOWNSTREAM_TMS

GND

DOWNSTREAM_TDI

GND

UG078_05_051004

Figure 5: Downstream System ACE Interface Connector (20-Pin Male)

14	www.xilinx.com	Virtex-4 LX/SX Prototype Platform
		UG078 (v1.2) May 24, 2006