Technical information

9
7. Figure 4.6 shows the interface circuit in the emulator. Use this figure as a
reference to decide the pull-up resistance value.
Emulator control circuit
22 Ω x 5
22 Ω x 2
4.7 kΩ x 7
HD74LV125A
HD74LVTH244
Vcc
11
1
2
4
5
6
3
7
MCU
Vcc
ETCK
ETRST#
RES#
ETMS
ETDI
ETDO
RES#
Vcc
Vcc
3.3 V
H-UDI port
connector
on the user
system
Figure 4.6 Interface Circuit in the Emulator (Reference)