Explanation of the Demo using a PC
S5U13781R00C100 Demonstration Manual
Seiko Epson Corporation
35
(Rev. 2.1)
4.1 Connection with USB Serial Conversion Board: UM232H (Control
S1D13781 via SPI)
A connection example to control the S1D13781 by connecting the S5U13781R00C100 reference board
and the UM232H via SPI is described in Figure 4-2,
Connecting the UM232H to S1D13781 via SPI
.
If noise on the SPI signal causes problems, place a resistor of several hundred ohms between the
S5U13781R00C100 and UM232H SPI port for the purpose of noise damping.
LDO
OSC
S1D13781
14x14mm
QFP
1
2
49
50
2
1
50
49
FLASH
55
1
2
49
50
FT232H
8x8mm
QFN
Mini
USB
J2
J1
J1
J2
J3
J4
J5
J6
J7
J8
J9
J10
1
3
1
14
14
1
51
52
2
1
8
7
J2-7 AD0
J2-8 AD1
J2-9 AD2
J2-10 AD3
J2-6 GND
UM232
JP-PIN
Name
FUNCTION
S5U13781
JP-PIN
Name
J1-2
J1-3
5V0
USB
5.0V OUT
VREGIN
J2-2
J2-3
3.3V OUT
VIO
3V3
VCCIO IN
FUNCTION
UM232
JP-PIN
Name
FUNCTION
UM232
JP-PIN
Name
FUNCTION
J2-6
GND
GND
J2-7
AD0
MPSSE/SK
MPSSE/DO
MPSSE/DI
MPSSE/CS
J2-8
AD1
J2-9
AD2
J2-10
AD3
J4-45
GND
GND
J4-27
SCS#
SPI CS IN
J4-28
SCK
SPI SCK IN
J4-29
MOSI
SPI DATA IN
J4-30
MISO
SPI DATA OUT
S5U13781
JP-PIN
Name
FUNCTION
J4-3
VDDIO
J3-4
3.3V IN
VDDDCDC
3.3V IN
J4-1
GND
GND
J4-2
GND
GND
J2-3 3V3
J2-2 VIO
J1-2 5V0
J1-3 USB
DC
DC
3.3V external
power supply
Connect to PC
3.3V external
power supply
1
55
Figure 4-2 Connecting the UM232H to S1D13781 via SPI
