Exsys EX-1305 User manual

1
Thank you for purchasing this USB Host to RS232 Adapter Cable (the
“Adapter Cable”). It is designed specifically to support Android Open
Accessory protocol. The Adapter Cable connects to a USB device on
the Android platform, establishes the USB connection, enumerates
Open Accessories, and then provides a bridge from the USB host port
to a UART interface. All necessary USB and Android Open Accessory
protocol is incorporated in the chip built-in the Adapter Cable, so
that users can quickly and easily establish a USB connectivity link and
have a basic UART (RXD, TXD, RTS, and CTS signals) interface for their
applications.
Android Open Accessory Protocol is supported in Android
Honeycomb (3.1) and later versions, with the benefit that data can
be transmitted and received without additional driver support.
EX-1305
USB Host to Android RS232 Adapter Cable
w/ DB9 Male Connector
1. Introduction
2. Connector Layout
RXD LED
Indicator
To Android Device
Micro-USB Connector
From AC/DC
Power Adapter,
+5V, USB Type-A
Connector
TXD LED
Indicator

USB Host to Android RS232 Adapter Cable, w/ DB9 Male Connector
2
Features:
✓Provides 1 RS232 Serial Port over USB Host Port
✓Provides Power Source to the Android Device via the Y-Cable
Configuration
✓Supports Battery Charging the Android Device with SDP (Standard
Downstream Port) Mode
✓Easy Serial Port Expansion for Android Devices
✓Supports UART Signals: TXD, RXD, RTS and CTS
✓Provides General HyperTerm UART Utility Apps;
Easily Adaptable to a Console Function:
◼Supports CTS/RTS Flow Control
◼Baud from 300 to 921600 With CTS/RTS Flow Control
◼Baud from 300 to 115200 Without Flow Control
◼Save File and Send File Functions
✓Provides 1 Nut-type DB9-Male Connector
✓Supports Android Platform Supporting Android Open
Accessory Mode (version 3.1 onwards and some v2.3.4 )
1. Connect the Micro-USB end of the Adapter Cable to your
Android Device’s Charging/USB connector.
2. Plug the USB Type-A end of the Adapter Cable into the USB
Battery Charging Adapter (not shipped with the Adapter Cable,
should have come with your Android Device)
3. Connect the RS232 Serial Device to the DB9 male connector of
the Adapter Cable by a Serial Cable.
3. Installing the Adapter Cable
Type-A to USB
Power Adapter
Micro-USB to the
Android Device
DB9 male to the
RS232 device via
the serial cable

USB Host to Android RS232 Adapter Cable, w/ DB9 Male Connector
3
The software drivers of the Adapter Cable are on the Google Play.
Please search “FTDI”keyword and install the Apps shown as the
following screenshot.
Along with the Apps download is a useful utility called FTDI AOA Hyper
Term. You can perform all tests for the serial functions including
changing settings, sending characters and receiving characters.
4. Installing Drivers
FTDI AOA Hyper Term Utility

USB Host to Android RS232 Adapter Cable, w/ DB9 Male Connector
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DB9(Male) to DB9(Male) Wiring
Power requirements: 5V DC, 135mA (max)
Operating temperature: 0 to 55C (32 to 131F)
Operating humidity: 5 to 95% RH
5. Male DB9 Pin Assignments and Cable Wiring
9 Pins Signal
1 NC
2 RXD
3 TXD
4 NC
5 GND
6 NC
7 RTS
8 CTS
9 NC
*NC: No Connection
DB9(Adapter Cable) DB9(Serial Device)
1 NC 1 NC
2 RXD 2 RXD
3 TXD 3 TXD
4 NC 4 NC
5 GND 5 GND
6 NC 6 NC
7 RTS 7 RTS
8 CTS 8 CTS
6. Environmental Specifications