2. Name and Functions of Each Part
S5U1C17F57T Manual
Seiko Epson Corporation
9
(Rev.1.1)
2.2
Functions of Each Part
2.2.1
Jumper Switch Functions
Table 2.2.1 Jumper function list for CPU board
Name
Type
Function
Factory
default
setting
Selectable
setting
JP1
(VD1_F-VD1)
Pin
Connects the S1C17F57 VD1_F terminal
to the VD1 terminal.
Short Open
JP2
(S1C17F57-V
DD
)
Pin
Connects the S1C17F57 V
DD
terminal to
the V
DD
power supply.
Short Open
JP3
(S1C17F57-VPP)
Pin
Connects the S1C17F57 VPP terminal to
the VPP power supply.
Short Open
JP4 to JP7
Solder
bridge
Selects the usage of the S1C17F57 P20 to
P23 terminals.
Short: General purpose I/O
Open: RF converter component
connection
Short Open
JP8 to JP11
Solder
bridge
Selects the usage of the S1C17F57 P24 to
P27 terminals.
Short: General purpose I/O
Open: RF converter component
connection
Short Open
JP12(VPP)
Pin
Selects the S1C17F57 Flash programming
power supply.
1(ICD): External power supply
connector CN2-2(J6)
3(USB): USB VBUS boost power supply
1(ICD)
3(USB)
JP13
(VPP_CNT-P05)
Pin
Enables the USB power supply boost
circuit.
Short: Enables the USB power supply
boost control
Open: Disables the USB power supply
boost control
Open Short
JP14(V
DD
)
Pin
Selects the S1C17F57 V
DD
power supply.
1(EXT): External power supply
connector CN3(J8)
3(USB): USB VBUS power supply
When using the coin battery in the
peripheral board, set to “1 (EXT)” and set
JP17 to open. Or remove this jumper
switch.
1(EXT) 3(USB)
Open
JP15 Solder
bridge
Connects the signal line (SIN) between the
CP2102 and the S1C17F57.
Open Short
JP16 Solder
bridge
Connects the signal line (SOUT) between
the CP2102 and the S1C17F57.
Open Short
JP17
(VDD_EXT)
Pin
Supplies the power from the external V
DD
power supply connector CN3 (J8).
Short: Supplies
Open: Does no supply.
Open Short
JP18
Pin
Connects the S1C17F57 VE1 terminal to
the VE2 terminal.
Open Short
JP19
Pin
Connects the S1C17F57 VE2 terminal to
the V
DD
terminal.
Open Short
