To Configure The Jtag Clock Speed (Communication Speed) - Agilent Technologies E5900B User Manual

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To configure the JTAG clock speed (communication
speed)
The emulation probe needs to be configured to communicate at a rate which is
compatible with your target processor. The JTAG clock speed is independent
of processor clock speed.
Some target systems that have additional loads on the JTAG lines or target
systems that do not quite meet the requirements (described in Chapter 5,
"Designing a Target System," beginning on page 53) may have run control
problems. Setting the JTAG communication speed to a slower setting may
allow the emulation probe to work.
The speed value is a number followed by either K, which indicates the value is
in kHz, or M, which indicates the value is in MHz. The clock can be set to
speeds in the range 512 kHz to 20 MHz. Not all values in this range are valid; if
an invalid speed is entered, the next slower valid speed will be used.
Entering cf speed without a value will display the current JTAG clock
speed.
JTAG clock speed configuration
Value
512K - 20M
(Default = 10 M)
"Configuring the Emulation Probe for Maximum Performance" on page 70
Emulation for the Motorola M•CORE
Built-in command
cf speed=value
Configuring the Emulation Probe
67