To Configure The Voltage Reference (All Processors); Voltage Reference - Agilent Technologies E5900B User Manual

CAUTION:

To configure the voltage reference (All processors)

The emulation probe uses the Vref signal on the JTAG connector to determine
logic high and logic low levels when driving the TDI and TCK signals.
Voltage Reference Configuration
Command
cf vref=external
cf vref=value
This option should only be used if the core voltage is different than that of the
Vref (+POWER) signal on the JTAG connector. Use this option with extreme
care, because it is possible to damage the target system if the voltage level is
chosen incorrectly.
Agilent Technologies Emulation for the PowerPC 400/600/700
Chapter 7: Configuring the Emulation Probe
Meaning
The voltage reference is generated by sensing the
voltage present at pin 6 (the +POWER pin) of the JTAG
header on the target system. (Default)
The voltage reference of value is generated internally by
the emulation probe. The value is a number followed by
either mV, which indicates the value is in millivolts, or V,
which indicates the value is in volts.
Configuration items
99