User`s manual

Table Of Contents
10
2.5.4 External Probe 1 (EXT1)/Trigger Output
An 8-pin connector, marked EXT1 (on the right under the user system interface cable connector), on the
emulator case accommodates four external probe inputs and two trigger outputs. The pin assignment of this
connector is shown in figure 2.8.
TUVCC
T5V
EXT1
GND GND
Probe Trigger output
1234
Figure 2.8 External Probe Connector 1
The interface circuit for the external probe 1 is shown in figure 2.9.
10 k
External probe 1, 2, 3, 4
HD151015
22
Vcc
Ω
Ω
Figure 2.9 Interface Circuit for External Probe 1
The trigger output is controlled by event channel 8 and is low active. The trigger output is available as either
T5V (probe color: white; within the range from 2.5 to 5.0 V and does not depend on the user V
CC
level) or TU
VCC
(probe color: yellow; the user V
CC
level). When the TU
VCC
is used, user system cannot be evaluated at the power
voltage of 1.8 V (the voltage must be within the range 2.0 to 5.0 V).
2.5.5 External Probe 2 (EXT2)/Trigger Output
A 6-pin connector, marked EXT2 (on the left under the user system interface cable connector), on the emulator
case accommodates four trigger outputs. The pin assignment of this connector is shown in figure 2.10.
EXT2
Trigger output
1234
56
Figure 2.10 External Probe 2 Connector
The trigger output is an active high signal which is output during the read or write cycles when a trace condition
(1 to 4) of the bus monitor function is satisfied. The trigger output is available as user V
CC
level. Note that,
however, some products do not support the external probe 2 (EXT2).