NEC QB-V850ESFJ3 Preliminary User's Manual page 35

QB-V850ESFJ3 Preliminary User's Manual
(3) Ensuring isolation
When connecting the target system to the QB-V850ESFJ3 using an extension probe, adjust the height using
the front spacer or rear spacer of the QB-V850ESFJ3 to ensure isolation from the target system.
Extension probe
Exchange adapter
Target connector
Remark The connector shown in the above figure is the connector used with the S Type. When used with the
T Type, read this connector as that of the T Type.
(4) Cautions related to extension probe
The following cautions pertain to using the extension probe.
<1> Be careful that stress of the extension probe is not placed on the target connector. Moreover, when
removing the extension probe, remove it slowly while holding down on the exchange adapter with a
finger so that there is no stress on the target connector.
<2> Be sure to connect the GND wire of the extension probe to the QB-V850ESFJ3 and the target system.
If not, the impedance of the cable becomes unstable, resulting in the lowering of signal transmission
characteristics or distortion of the output waveform for an input waveform.
<3> When using the external bus interface with the extension probe, add a data wait state by increasing the
set value of the DWC register by one.
Figure 2-10. Connection Using Emulation Probe
Front spacer
(Height adjustable)
ZUD-CD-05-0149
QB-V850ESFJ3
Rear spacer
(Height adjustable)
35/57