With the rapid proliferation of USB interface in the embedded world, developers are looking for easiest ways to add USB to microcontroller-based applications in their design. ASIX’s new AX781x0 family features four USB connectivity bridge solutions including USB 2.0 to Single Serial (AX78120), USB 2.0 to Dual Serial (AX78120), USB 2.0 to Quad Serial (AX78140) and USB 2.0 to Dual Serial and Single Parallel (AX78140) controllers. Enabling smooth migration from legacy system using ASIX’s MCS78x0 series, AX78120/AX78140 provide pin-to-pin compatible and driver backward compatible with MCS7810/MCS7820/MCS7840.
USB 2.0 to Multi I/O (4S, 2S+1P) Controller
● Single chip USB 2.0 to Multi I/O (4S, 2S+1P) Controller
● USB Device Controller
-- Integrates on-chip USB 2.0 PHY and controller compliant to USB Spec 2.0 and 1.1
-- Supports all USB 2.0 power saving modes (L1, L2)
-- Supports USB High/Full Speed modes with Bus-power or Self-power device auto-detect capability
-- Supports USB LPM (Link Power Management)
● Dual/Quad Serial Port Controller
-- Two/four 16c450/16c550 compatible UARTs
-- Supports SIR IrDA mode on any/all ports
-- Supports RS-232, RS-422 and RS-485 serial ports
-- Supports multi-protocol serial transceivers
-- Supports 5, 6, 7 & 8 bit serial data
-- Supports automatic data direction control
-- Supports multi-drop mode with auto address detection
-- Supports hardware and software flow control
-- Supports baud rates from 50bps to 6Mbps
-- Supports custom baud rates from external clock
-- On-Chip 1024-Byte FIFO for upstream and 512-Byte for downstream data transfer for each Serial Port
-- I2C interface for EEPROM
-- Supports read/write EEPROM through USB interface
-- On-Chip buffers for serial port signals to operate without external transceivers over short cable
-- Pin-to-Pin compatible with MCS7810/MCS7820/MCS7840
-- Driver backward compatible with MCS7810/MCS7820/MCS7840
● Support Remote Wake Up Function
-- Supports Suspend Mode and Remote Wakeup via RXD, RI, DSR, DCD and CTS pin
● Advanced Power Management Features
-- Supports USB LPM (Link Power Management)
-- Supports remote wake up re-trigger
● Parallel Port
-- AX78140 supports optional 2 Serial Port and 1 Parallel Port configuration
-- On-Chip 1024-Byte FIFO for upstream and 512-Byte for downstream data transfer for Parallel Port
-- AX78140 supports 1 GPIO pin and 16 optional software controlled GPIO pins
● Integrates on-chip 1.8V and 3.3V voltage regulator and only requires a single 5V power supply
● Single 12MHz clock input from either crystal or oscillator source
● Integrates on-chip power-on reset circuit
● Small form factor with 64-pin LQFP RoHS compliant package
● Operating over 0°C to 70°C or -40°C to +85°C temperature range
Serial Attached Devices
Serial Networking / Monitoring Equipment
Data Acquisition System
POS Terminal & Industrial PC
Parallel / Printer Port based applications
AX78140 USB 2.0 to 4S Demo Board (AX78140-DMB-4S-1)
This is an AX78140 USB 2.0 to 4S adapter for users to evaluate AX78140 USB 2.0 to 4S functionalities
AX78140 USB 2.0 to 2S1P Demo Board (AX78140-DMB-2S1P-1)
This is an AX78140 USB 2.0 to 2S1P adapter for users to evaluate AX78140 USB 2.0 to 2S1P functionalities.
Hardware Design Considerations
Is AX78140 IC pin-to-pin compatible to MCS7840 IC?
Yes, AX78140 IC is pin-to-pin compatible to MCS7840 IC.
Where can I obtain the latest AX78140 datasheet, reference schematic and other hardware design archives?
Please register MyASIX membership and then download the latest AX78140 datasheet, reference schematic, PCB layout guide, etc. from AX78140 Product web page directly.
Can ASIX help me to review my own AX78140 schematic and PCB layout?
Yes, please deliver your own AX78140 schematic and PCB layout files to ASIX’s Support (email@example.com) for further review before making your own AX78140 PCB board.
Is the I2C EEPROM required for AX78140 4S/2S1P applications?
The I2C EEPROM is required for AX78140 2S1P applications and is optional for AX78140 4S applications.
How to program AX78140 I2C EEPROM in-circuit?
The AX78140 supports a Windows EEPROM Utility to program the I2C EEPROM in-circuit.
Does ASIX support RS-232/RS-485 transceivers solutions?
Yes, ASIX also supports different RS-232/RS-485 transceivers solutions. Please visit ASIX UART Transceivers/EL Drivers Products Web page for more details.
Does AX78140 USB to parallel port support ECP/EPP modes?
No, AX78140 USB to parallel port doesn’t support ECP/EPP modes.
Software Design Considerations
Can AX78140 install the original MCS7840 drivers directly?
Yes, you should be able to install the original MCS7840/MCS7820 drivers on AX78140 applications directly. If you have any problems, please download the latest AX781x0 drivers from AX78140 Driver Download web page instead. The latest AX781x0 drivers supports all AX78140/AX78120/MCS7840/MCS7820/MCS7810 applications.
Where can I obtain the latest AX78140 drivers?
Please visit AX78140 Driver Download web page to download proper drivers for your AX78140 target applications.
How to change the COM port number of AX78140?
Yes, we can change the COM port number by using a drop down list located in AX78140 Windows COM Port Properties. To change the COM port number, go to "COM Port Properties => Features => COM Port Number".
How to change the LPT port number of AX78140?
Yes, we can change the LPT port number by using a drop down list located in AX78140 Windows LPT Port Properties. To change the LPT port number, go to "LPT Port Properties => Features => LPT Port Number".
Hardware Design Documentation
AX78140 USB 2.0 to 4S Demo Board Reference Schematic
AX78140 USB 2.0 to 2S1P Demo Board Reference Schematic
Software & Tools
Linux kernel 5.x/4.x/3.x/2.6.x DriverFor all Android systems, Linux kernel 2.6.14 and later
Windows 11 64-bit DriverFor x64 CPU platform, HLK/WHCK certified
Windows 10 32-bit DriverFor x86 CPU platform, HLK/WHCK certified
Windows 10 64-bit DriverFor x64 CPU platform, HLK/WHCK certified
Windows 8.x 32-bit DriverFor x86 CPU platform, HLK/WHCK certified
Windows 8.x 64-bit DriverFor x64 CPU platform, HLK/WHCK certified
Windows 7/Vista/XP 32-bit DriverFor x86 CPU platform, WHCK certified
Windows 7/Vista/XP 64-bit DriverFor x64 CPU platform, WHCK certified
PCIe/PCI/USB to serial/parallel bridge solutions for industrial computers and embedded systems
UART Transceivers/EL Drivers
5V/3V RS-232/RS-422/RS-485 UART transceivers solutions for industrial computers, embedded systems; EL drivers solutions for PDAs, cell phones and other handheld/portable devices.
PCI Bridge [NOT FOR NEW DESIGN!!]
USB 2.0 to Multi I/O (1S or 2S) Controller