AX78120

USB 2.0轉多I/O (1S或2S) 控制器

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簡介

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.


AX78120 is a USB 2.0 to Multi I/O (1S or 2S) Controller. It has been developed to connect a wide range of standard serial devices to a USB host. The AX78120’s support for the following serial communication program are included: HyperTerminal, PComm, Windows direct connection, Windows dial-up connection through modem, Networking over IrDA and Windows direct connection over IrDA, Minicom.

規格:

● Single chip USB 2.0 to Multi I/O (1S or 2S) 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 Serial Port Controller
-- Two 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
● 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 48-pin LQFP RoHS compliant package
● Operating over -40°C to +85°C temperature range

應用目標:

Serial Attached Devices

Serial Networking / Monitoring Equipment
Data Acquisition System
POS Terminal & Industrial PC

圖表

test

開發板

test

AX78120 USB 2.0轉2序列埠評估板 (AX78120-DMB-2S-1)

AX78120 USB 2.0轉2序列埠評估板，提供客戶用來驗證AX78120 USB 2.0轉2序列埠功能。

常見問題

硬體設計注意事項

  • Is AX78120 IC pin-to-pin compatible to MCS7820 IC?

    Yes, AX78120 IC is pin-to-pin compatible to MCS7820 IC.

  • Where can I obtain the latest AX78120 datasheet, reference schematic and other hardware design archives?

    Please register MyASIX membership (http://www.asix.com.tw/RegLogin.php?mod=thisis) and then download the latest AX78120 datasheet, reference schematic, PCB layout guide, etc. from AX78120 Product web page directly.

  • Can ASIX help me to review my own AX78120 schematic and PCB layout?

    Yes, please deliver your own AX78120 schematic and PCB layout files to ASIX’s Support (support@asix.com.tw) for further review before making your own AX78120 PCB board.

  • Is the I2C EEPROM required for AX78120 2S applications?

    The I2C EEPROM is optional for AX78120 2S applications.

  • How to program AX78120 I2C EEPROM in-circuit?

    The AX78120 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 (i.e. Zywyn RS-232/RS-485 transceivers products). Please visit ASIX I/O Connectivity RS-232/RS-485 Transceivers Products Web page for more details.

軟體設計注意事項

  • Can AX78120 install the original MCS7820 drivers directly?

    Yes, you should be able to install the original MCS7820 drivers on AX78120 applications directly. If you have any problems, please download the latest AX781x0 drivers from AX78120 Driver Download web page instead. The latest AX781x0 drivers supports all AX78140/AX78120/MCS7840/MCS7820/MCS7810 applications.

  • Where can I obtain the latest AX78120 drivers?

    Please visit AX78120 Driver Download web page to download proper drivers for your AX78120 target applications.

  • How to change the COM port number of AX78120?

    Yes, we can change the COM port number by using a drop down list located in AX78120 Windows COM Port Properties. To change the COM port number, go to "COM Port Properties => Features => COM Port Number".

檔案下載

技術文件

產品簡介，產品介紹和數據表

AX78120 Product Brief

發行日期
2024-01-16

檔案大小
318.8 KB

AX78120 Product Introduction

版本
1.10

發行日期
2024-01-17

檔案大小
1,005.5 KB

AX78120 Datasheet

版本
1.10

發行日期
2024-01-17

檔案大小
1.1 MB

參考手冊和用戶指南

AX78120 EEPROM User Guide

發行日期
2025-11-05

測試報告

AX78120 Reliability Report

發行日期
2025-11-05

AX78120 RoHS Report

發行日期
2025-11-05

硬體設計文件

參考線路圖

AX78120 USB 2.0 to 2S Demo Board Reference Schematic

版本
1.00

發行日期
2016-04-26

檔案大小
253.7 KB

AX78120 USB 2.0 to 1S Reference Schematic

版本
1.10

發行日期
2016-05-26

檔案大小
254.6 KB

材料清單，應用產品設計注意事項和佈局使用指南

AX78120 USB 2.0 to 2S Demo Board BOM File

發行日期
2016-06-22

檔案大小
190.3 KB

AX78120 USB 2.0 to 1S Schematic BOM File

發行日期
2016-07-18

檔案大小
189.3 KB

AX78120 Application Design Note

版本
1.00

發行日期
2016-06-24

檔案大小
1,020.4 KB

PCB佈局，Gerber 和IBIS模型檔案

AX78120 USB 2.0 to 2S Demo Board PCB Layout Files

發行日期
2016-02-25

檔案大小
217.3 KB

AX78120 USB 2.0 to 2S Demo Board Gerber Files

發行日期
2016-02-25

檔案大小
837.3 KB

AX78120 IBIS Model

發行日期
2016-09-14

檔案大小
391.1 KB

軟體 & 工具

驅動程式

Linux kernel 5.x/4.x/3.x/2.6.x Driver

For all Android systems, Linux kernel 2.6.14 and later

版本
3.7.0

發行日期
2022-05-21

檔案大小
32.1 KB

Windows 11 64-bit Driver

For x64 CPU platform, HLK/WHCK certified

版本
3.22.2.0

發行日期
2025-07-30

檔案大小
1.1 MB

Windows 11 ARM 64-bit Driver

For ARM x64 CPU platform, HLK/WHCK certified

版本
3.22.2.0

發行日期
2025-07-30

檔案大小
4.4 MB

Windows 10 32-bit Driver

For x86 CPU platform, HLK certified

版本
3.20.9.0

發行日期
2021-08-30

檔案大小
885.5 KB

Windows 10 64-bit Driver

For x64 CPU platform, HLK certified

版本
3.20.9.0

發行日期
2021-08-30

檔案大小
985.6 KB

Windows 8.x 32-bit Driver

For x86 CPU platform, HLK/WHCK certified

版本
3.18.6.0

發行日期
2018-11-14

檔案大小
898.2 KB

Windows 8.x 64-bit Driver

For x64 CPU platform, HLK/WHCK certified

版本
3.18.6.0

發行日期
2018-11-14

檔案大小
1.0 MB

Windows 7/Vista/XP 32-bit Driver

For x86 CPU platform, WHCK certified

版本
3.12.6.0

發行日期
2018-11-14

檔案大小
1.1 MB

Windows 7/Vista/XP 64-bit Driver

For x64 CPU platform, WHCK certified

版本
3.12.6.0

發行日期
2018-11-14

檔案大小
1.2 MB

實用工具

Windows EEPROM Utility

發行日期
2025-11-05

Windows MP Tool

發行日期
2025-11-05

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