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MAX3421E
USB Peripheral/Host Controller with SPI Interface
A Single IC with USB Functionality
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The MAX3421E USB peripheral/host controller contains the digital logic and analog circuitry necessary to implement a full-speed USB peripheral or a full-/low-speed host compliant to USB specification rev 2.0. A built-in transceiver features ±15kV ESD protection and programmable USB connect and disconnect. An internal serial interface engine (SIE) handles low-level USB protocol details such as error checking and bus retries. The MAX3421E operates using a register set accessed by an SPI interface that operates up to 26MHz. Any SPI master (microprocessor, ASIC, DSP, etc.) can add USB peripheral or host functionality using the simple 3- or 4-wire SPI interface.
The MAX3421E makes the vast collection of USB peripherals available to any microprocessor, ASIC, or DSP when it operates as a USB host. For point-to-point solutions, for example, a USB keyboard or mouse interfaced to an embedded system, the firmware that operates the MAX3421E can be simple since only a targeted device is supported.
Internal level translators allow the SPI interface to run at a system voltage between 1.4V and 3.6V. USB-timed operations are done inside the MAX3421E with interrupts provided at completion so an SPI master does not need timers to meet USB timing requirements. The MAX3421E includes eight general-purpose inputs and outputs so any microprocessor that uses I/O pins to implement the SPI interface can reclaim the I/O pins and gain additional ones.
The MAX3421E operates over the extended -40°C to +85°C temperature range and is available in a 32-pin TQFP package (5mm x 5mm) and a 32-pin TQFN package (5mm x 5mm).
FAQs: MAX3421E
The MAX3421E makes the vast collection of USB peripherals available to any microprocessor, ASIC, or DSP when it operates as a USB host. For point-to-point solutions, for example, a USB keyboard or mouse interfaced to an embedded system, the firmware that operates the MAX3421E can be simple since only a targeted device is supported.
Internal level translators allow the SPI interface to run at a system voltage between 1.4V and 3.6V. USB-timed operations are done inside the MAX3421E with interrupts provided at completion so an SPI master does not need timers to meet USB timing requirements. The MAX3421E includes eight general-purpose inputs and outputs so any microprocessor that uses I/O pins to implement the SPI interface can reclaim the I/O pins and gain additional ones.
The MAX3421E operates over the extended -40°C to +85°C temperature range and is available in a 32-pin TQFP package (5mm x 5mm) and a 32-pin TQFN package (5mm x 5mm).
FAQs: MAX3421E Key Features
- Microprocessor-Independent USB Solution
- Software Compatible with the MAX3420E USB Peripheral Controller with SPI Interface
- Complies with USB Specification Revision 2.0 (Full-Speed 12Mbps Peripheral, Full-/Low-Speed 12Mbps/1.5Mbps Host)
- Integrated USB Transceiver
- Firmware/Hardware Control of an Internal D+ Pullup Resistor (Peripheral Mode) and D+/D- Pulldown Resistors (Host Mode)
- Programmable 3- or 4-Wire, 26MHz SPI Interface
- Level Translators and VL Input Allow Independent System Interface Voltage
- Internal Comparator Detects VBUS for Self-Powered Peripheral Applications
- ESD Protection on D+, D-, and VBCOMP
- Interrupt Output Pin (Level- or Programmable-Edge) Allows Polled or Interrupt-Driven SPI Interface
- Eight General-Purpose Inputs and Eight General-Purpose Outputs
- Interrupt Signal for General-Purpose Input Pins, Programmable Edge Polarity
- Intelligent USB SIE
- Automatically Handles USB Flow Control and Double Buffering
- Handles Low-Level USB Signaling Details
- Contains Timers for USB Time-Sensitive Operations so SPI Master Does Not Need to Time Events
- Space-Saving Lead-Free TQFP and TQFN Packages (5mm x 5mm)
Applications/Uses
- Cameras
- Custom USB Devices
- Desktop Routers
- Embedded Systems
- Instrumentation
- Medical Devices
- Microprocessors and DSPs
- MP3 Players
- PDAs
- PLCs
- Set-Top Boxes
Technical Docs
| Data Sheet | USB Peripheral/Host Controller with SPI Interface | Jul 19, 2013 | |
| Tutorial | Turn Any Video Game Controller into a USB Mouse | ||
| App Note | MAX3421E-Revisions 1 and 2 Host OUT Transfers | ||
| App Note | Setting Up the Maxim USB Laboratory | ||
| App Note | The Maxim USB Laboratory | ||
| App Note | Isolating USB | ||
| App Note | Practical USB Terminology | ||
| App Note | MAX3421E Programming Guide | ||
| App Note | Frequently Asked Questions about the MAX3421E |
Click any title below to view the detail page where available.
Description
The MAX3421 evaluation kit-1 (EV kit-1) provides a proven design to evaluate the MAX3421E USB peripheral controller with SPI interface. The EV kit contains both a MAX3421E USB host & peripheral controller and a MAX3420E USB peripheral controller for user evaluation and development. Connector J4 is wired to plug into a Keil MCB2130 development board, which contains a Philips ARM controller (LPC2318). The design uses two separate SPI ports to provide independent operation of the two USB controllers (MAX3421E and MAX3420E).
The MAX3421 EV kit-1 adds USB functionality to any microcontroller, microprocessor, DSP, CPLD, FPGA, or ASIC with an SPI master interface, or five GPIO lines.
The EV kit-1 board comes with the MAX3421EEHJ+ and MAX3420EECJ+ installed.
View DetailsFeatures
- Ideal USB Training and Debugging System
- Mates to Keil MCB2130 Development Board
- Can Be Wired into User Systems
- MAX3421E Can Be Used as USB Host or Peripheral
- MAX3420E Provided On-Board as a Test Peripheral
- MAX3420E Can be Used to Develop USB Peripheral Code
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Parameters
Parametric specs for USB Controllers
| VSUPPLY (V) | 3.3 |
| ISUPPLY (mA) (max) | 45 |
| Host Speed (Mbps) | 12/1.5 |
| Peripheral Speed (Mbps) | 12 |
| SPI Clock (MHz) | 0 to 26 |
| VL (V) | 1.4 to 3.6 |
| Package/Pins | TQFN/32 TQFP/32 |
| Oper. Temp. (°C) | -40 to +85 |
| Budgetary Price (See Notes) | $4.33 @1k |
Key Features
- Microprocessor-Independent USB Solution
- Software Compatible with the MAX3420E USB Peripheral Controller with SPI Interface
- Complies with USB Specification Revision 2.0 (Full-Speed 12Mbps Peripheral, Full-/Low-Speed 12Mbps/1.5Mbps Host)
- Integrated USB Transceiver
- Firmware/Hardware Control of an Internal D+ Pullup Resistor (Peripheral Mode) and D+/D- Pulldown Resistors (Host Mode)
- Programmable 3- or 4-Wire, 26MHz SPI Interface
- Level Translators and VL Input Allow Independent System Interface Voltage
- Internal Comparator Detects VBUS for Self-Powered Peripheral Applications
- ESD Protection on D+, D-, and VBCOMP
- Interrupt Output Pin (Level- or Programmable-Edge) Allows Polled or Interrupt-Driven SPI Interface
- Eight General-Purpose Inputs and Eight General-Purpose Outputs
- Interrupt Signal for General-Purpose Input Pins, Programmable Edge Polarity
- Intelligent USB SIE
- Automatically Handles USB Flow Control and Double Buffering
- Handles Low-Level USB Signaling Details
- Contains Timers for USB Time-Sensitive Operations so SPI Master Does Not Need to Time Events
- Space-Saving Lead-Free TQFP and TQFN Packages (5mm x 5mm)
Applications/Uses
- Cameras
- Custom USB Devices
- Desktop Routers
- Embedded Systems
- Instrumentation
- Medical Devices
- Microprocessors and DSPs
- MP3 Players
- PDAs
- PLCs
- Set-Top Boxes
Description
The MAX3421E USB peripheral/host controller contains the digital logic and analog circuitry necessary to implement a full-speed USB peripheral or a full-/low-speed host compliant to USB specification rev 2.0. A built-in transceiver features ±15kV ESD protection and programmable USB connect and disconnect. An internal serial interface engine (SIE) handles low-level USB protocol details such as error checking and bus retries. The MAX3421E operates using a register set accessed by an SPI interface that operates up to 26MHz. Any SPI master (microprocessor, ASIC, DSP, etc.) can add USB peripheral or host functionality using the simple 3- or 4-wire SPI interface.
The MAX3421E makes the vast collection of USB peripherals available to any microprocessor, ASIC, or DSP when it operates as a USB host. For point-to-point solutions, for example, a USB keyboard or mouse interfaced to an embedded system, the firmware that operates the MAX3421E can be simple since only a targeted device is supported.
Internal level translators allow the SPI interface to run at a system voltage between 1.4V and 3.6V. USB-timed operations are done inside the MAX3421E with interrupts provided at completion so an SPI master does not need timers to meet USB timing requirements. The MAX3421E includes eight general-purpose inputs and outputs so any microprocessor that uses I/O pins to implement the SPI interface can reclaim the I/O pins and gain additional ones.
The MAX3421E operates over the extended -40°C to +85°C temperature range and is available in a 32-pin TQFP package (5mm x 5mm) and a 32-pin TQFN package (5mm x 5mm).
FAQs: MAX3421E
The MAX3421E makes the vast collection of USB peripherals available to any microprocessor, ASIC, or DSP when it operates as a USB host. For point-to-point solutions, for example, a USB keyboard or mouse interfaced to an embedded system, the firmware that operates the MAX3421E can be simple since only a targeted device is supported.
Internal level translators allow the SPI interface to run at a system voltage between 1.4V and 3.6V. USB-timed operations are done inside the MAX3421E with interrupts provided at completion so an SPI master does not need timers to meet USB timing requirements. The MAX3421E includes eight general-purpose inputs and outputs so any microprocessor that uses I/O pins to implement the SPI interface can reclaim the I/O pins and gain additional ones.
The MAX3421E operates over the extended -40°C to +85°C temperature range and is available in a 32-pin TQFP package (5mm x 5mm) and a 32-pin TQFN package (5mm x 5mm).
FAQs: MAX3421E Technical Docs
| Data Sheet | USB Peripheral/Host Controller with SPI Interface | Jul 19, 2013 | |
| Tutorial | Turn Any Video Game Controller into a USB Mouse | ||
| App Note | MAX3421E-Revisions 1 and 2 Host OUT Transfers | ||
| App Note | Setting Up the Maxim USB Laboratory | ||
| App Note | The Maxim USB Laboratory | ||
| App Note | Isolating USB | ||
| App Note | Practical USB Terminology | ||
| App Note | MAX3421E Programming Guide | ||
| App Note | Frequently Asked Questions about the MAX3421E |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
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