Connection With Usb Serial Conversion Board: Um232H (Control S1D13781 Via Spi) - Epson S5U13781R00C100 Demonstration Manual

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.
14
FT232H
8x8mm
QFN
J1-3 USB
J1-2 5V0
1
J1
Mini
USB
Connect to PC
S5U13781R00C100 Demonstration Manual
(Rev. 2.1)
3.3V external
power supply
14
J2-10 AD3
J2-9 AD2
J2-8 AD1
J2-7 AD0
J2-6 GND
J2-3 3V3
J2-2 VIO
1
J2
JP-PIN Name
J1-2
J2-2
JP-PIN Name
J2-6
J2-7
J2-8
J2-9
J2-10
Figure 4-2 Connecting the UM232H to S1D13781 via SPI
Seiko Epson Corporation
Explanation of the Demo using a PC
J4
1 2
1 J3
2
LDO
7
J2
8
S1D13781
14x14mm
QFP
J7
OSC
J6
FLASH
3
49 50
UM232
FUNCTION JP-PIN Name
5V0 VREGIN J1-3
VIO VCCIO IN J2-3
UM232
FUNCTION JP-PIN Name
GND GND J4-45
AD0 MPSSE/SK J4-28
AD1 MPSSE/DO J4-29
AD2 MPSSE/DI J4-30
AD3 MPSSE/CS J4-27
JP-PIN Name
J4-1
3.3V external
J4-2
J4-3
power supply
J3-4
50 49 50 49 55
DC
52 51
J10
DC
55
1
J8
J1
1
2 1 2 1
J5 J9
UM232
FUNCTION
USB 5.0V OUT
3V3 3.3V OUT
S5U13781
FUNCTION
GND GND
SCK SPI SCK IN
MOSI SPI DATA IN
MISO SPI DATA OUT
SCS# SPI CS IN
S5U13781
FUNCTION
GND GND
GND GND
VDDIO 3.3V IN
VDDDCDC
3.3V IN
35