Appendix 1.
Circuit Configuration Example to Eliminate External Power Supply for
Target Board
6
Seiko Epson Corporation
S5U1C31001L1200 (Bridge Board Ver. 2)
Manual (Rev.1.0)
Appendix 1. Circuit Configuration Example to Eliminate External Power
Supply for Target Board
The S5U1C31001L1200 (Bridge Board Ver. 2) can 5 V and +3 V fixed power only to the target board. If
the target board requires another voltage to operate, it must be externally supplied to the target board.
You can make a debugging environment without an external power supply by mounting a voltage regulator, which
is driven with +5 V from the S5U1C31001L1200 (Bridge Board Ver. 2), on the target board (See Figure A1.1).
When connecting a reset circuit that uses a push switch on the target board to the #RESET pin of the S1C31 Family
MCU, it should be designed so that no conflict will occur between the reset signal on the target board and the
nRESET signal of the debug probe.
Figure A1.1 Circuit Configuration Example to Eliminate External Power Supply for Target Board
Bridge Board Ver. 2
ENVPP
V
PP
V
CC
+3 V
VTref
nRESET
SWCLK
SWDIO
GND
Regulator
S1C31 Family
MCU
Vpp
Vdd
#RESET
SWCLK
SWD
GND
Debug
Probe
+5 V
VTref
nRESET
SWCLK
SWDIO
GND
Target Board
Reset
circuit
ENVPP
