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AR# 15398

SYSTEM ACE CF - How is the CFGTCK derived when using System Ace CF solution?

Description

General Description:

When configuring a device via System Ace CF, how is the CFGTCK derived in the System Ace CF device, and what are its operating frequencies?

Solution

The JTAG signals are directly multiplexed from the respective configuration source.

When using the Compact Flash card as the configuration source, the CFGTCK output for the System Ace CF device is derived from the CLK input to the System Ace CF, and the operating frequency of the CFGTCK is the same as CLK.

- The MIN clock operating frequency is 0 MHz.

- The MAX clock operating frequency is either 33 MHz or the maximum JTAG clock speed listed in the target device(s) BSDL files, and the lowest of these values should be used.

When using the TSTJTAG interface as the configuration source, the CFGTCK output for the System Ace CF device is derived from the TSTTCK input to the System Ace CF, and the operating frequency of the CFGTCK is the same as TSTTCK.

- The MIN clock operating frequency is 0 MHz.

- The MAX clock operating frequency is either 16.7 MHz or the maximum JTAG clock speed listed in the target device(s) BSDL files, and the lowest of these values should be used.

When using the MPU interface as the configuration source, the CFGTCK output for the System Ace CF device is derived from the CLK input to the System Ace CF (supplied by the MPU), and the operating frequency of the CFGTCK is the same as CLK.

- The MIN clock operating frequency is 0 MHz.

- The MAX clock operating frequency is either 33 MHz or the maximum JTAG clock speed listed in the target device(s) BSDL files, and the lowest of these values should be used.

AR# 15398
Date Created 09/03/2007
Last Updated 12/15/2012
Status Active
Type General Article