4. Connectors
4
Seiko Epson Corporation
S5U1C31001L1200 (Bridge Board Ver. 2)
Manual (Rev.1.0)
4. Connectors
4.1 20-pin Legacy Connector (J1)
Table 4.1 20-pin Legacy Connector (J1) Pin Assignment Table
No
Name
I/O
Description
1
VTref
O
Reference voltage of the target MCU
2
–
–
N.C.
3
–
–
N.C
4
GND
P
GND
5
–
–
N.C.
6
GND
P
GND
7
SWDIO
I/O
Serial wire data input/output
8
GND
P
GND
9
SWDCLK
I
Serial wire clock input
10 GND
P
GND
11 –
–
N.C.
12 GND
P
GND
13 –
–
N.C.
14 GND
P
GND
15 nRESET
I
Target MCU reset
16 GND
P
GND
17 –
–
N.C.
18 GND
P
GND
19 +5V
P (I)
DC +5 V input
20 GND
P
GND
Figure 4.1 20-pin Legacy Connector (J1) Pin Assignment
