E2/E2 Lite
R20UT4582EJ0100 Rev.1.00
Page 16 of 30
Jul.16.19
2.6
Internal Circuits of the Emulator
2.6.1
Internal Circuits of the E2
Figure 2.7 shows the internal circuits of the E2 with the MCU connected via the SWD interface.
74LVC1T45
74LVC1T45
74LVC8T245
3.3 V
Emulator
control
circuit
47
Ω
NFL21SP
Noise filter
47
Ω
Noise filter
1 M
Ω
x 2
47
Ω
VCC
SWCLK/RxD
1
Power-supply
circuit
(only for use in
the mode to
supply power to
the user system)
User-side
connector
4
2
SWDIO/TxD
9
10
3, 5,
15, 17, 19
GND
100 k
Ω
GND
RES#
Self-recovering
fuse
100 k
Ω
3.3 V
74LVC1T45
74LVC1T45
0.1 uF
NFL21SP
Figure 2.7 Internal Circuits of the E2 with the MCU Connected via the SWD Interface
