VNC2 Web Training - Chip Intro (Part One)

Slide 1: 

Vinculum II (VNC2) Product Training

VNC2: Introduction : 

VNC2: Introduction VNC2 is the 2nd generation of Vinculum USB controllers. VNC2 is a programmable, dual channel USB Host / Slave controller with embedded microprocessor core. Designed to deliver powerful USB connectivity and processing capability for embedded applications. Enhanced features and capabilities over VNC1L: Upgraded CPU offering increased the processing power. Programmability, supports user customised firmware. Hardware acceleration of USB processing. Multiple interfaces Supported with Vinculum II software development tools and resources to enable faster time to market, as well as provide a low-risk easy to adopt solution.

VNC2: Architecture : 

Two independent USB Host / Slave interfaces. 16-bit, 48MHz Harvard architecture MCU core. 256KBytes Flash Memory for firmware storage. 16KBytes RAM. Interrupt and timer interfaces VNC2: Architecture

VNC2: Architecture : 

Interfaces: UART SPI Slave SPI Master FIFO mode 8 PWM blocks GPIO Debug Interface 4 DMA engines for managing I/O transfers VNC2: Architecture

VNC2: USB Support : 

VNC2: USB Support VNC2 has two independent USB 2.0 compliant Host / Slave interfaces Supports 1.5Mb/s (Low Speed) and 12Mb/s (Full Speed) transactions. Supports 4 main USB data transfer types. Interrupt transfers: Bulk: Isochronous: Control USB Host capability Modelled on OHCI Host controller specification. Provides capability comparable to USB Host controller found on a PC. Very powerful, hardware based autonomous host engine, which uses minimal CPU resources. Timely, reliable transfers, eg keyboard and mouse. Large blocks of data less time critical eg Printers, FT232R. Defined bandwidth & latency eg. Webcams. Used for device configuration and enumeration.

CPU Resource : 

CPU Resource A large percentage of VNC1 software functions have been moved into VNC2 hardware, releasing CPU resources.

CPU : 

CPU Vinculum II has expanded the Vinculum I CPU to provide a cost effective, USB optimised CPU: VNC1 – 8 bit Harvard architecture VNC2 16 bit Harvard architecture Operating frequency – 48MHz, 24MHz, 12MHz. Variable length instruction word – instructions can be 16 bit to 64 bits in size 8, 16, 32 signed/unsigned support Byte addressable

External Interfaces : 

External Interfaces UART Standard UART connections supporting 183baud to 6Mbaud. GPIO Up to 44 general purpose that can be configured as inputs or outputs. Inputs can be used to trigger interrupts. FIFO Fast 8-bit FIFO interface supporting asynchronous (10MByte/s) and synchronous (48MByte/s) communication modes. PWM (Pulse Width Modulation) Designed for controlling external analogue devices. 8 PWM outputs with 8 bit pre-scaler and 16 bit timer. 16 bit comparator per output to support 8 toggles per PWM cycle.

SPI Interfaces : 

SPI Interfaces SPI - Popular 4 wire serial interface VNC2 supports two SPI Slave ports and one SPI Master port. SPI master interfaces designed to for SD card interfacing, amongst other applications. SPI master supports up to slave select outputs. SPI max clock rate derived at ¼ of CPU clock frequency. Normal mode, CPU 48MHz, SPI max clock is 12MHz Lowest power mode CPU 12MHz, SPI max clock is 3MHz. SPI slave supports various supported operating modes including clock phase and polarity control modes.

Slide 10: 

The SPI slave protocol by default does not support any form of handshaking. FTDI have added extra modes to support handshaking, faster throughput of data and reduced pin count. These modes are as follows: SPI Slave

Debug Interface : 

Debug Interface Designed to support firmware debug via software tools. Modelled one bit bi-directional pin, using UART 1Mbaud, 8 bit, 1 start, 1 stop, no parity protocol. Debugger is a master on all internal buses and can therefore configure peripherals, change memory, write to the flash, etc. Accesses CPU’s breakpoint unit (effectively a peripheral) to set breakpoints, halt, step, etc. Requires hardware support to translate debug pin to USB. Use FTDI VNC2 debug module. Implement USB to debug interface circuit on customer hardware.

Debug Interface : 

Debug Interface Debug module circuit based on FT232R to translate debug pin to a USB I/F for software tool access Users can implement entire circuit or implement header for VNC2 debug module Debug header

IO Multiplexer : 

IO Multiplexer Internal IO multiplexer (IOMux). Designed to provide a flexible mechanism for connecting signals to device pins. A device signal, eg UART_TXD, is allocated to one of four groups. Signal can be connected to any IOBUS device pin in the group. Each IOBUS pin can also be pulled up/down, have extra drive strength and can be a schmitt trigger. Asserting device PROG# and RESET# pins will cause IOMux pins to return to default settings.

VNC2: Power Operation : 

VNC2: Power Operation Low power operation. 4 Power modes. Fourth mode is a suspend mode, consuming ~150uA. Device can be woken from suspend when activity is detected on: USB0/1 DP or DM SPI slave 0/1 SSn uart_ri

VNC2: Packages : 

VNC2: Packages LQFP and QFN have same pin assignments. The groupings are used by the IO_MUX to define the actual pin functionality. 2 USB ports, power and ground are available on all packages

VNC2 to VNC1L Summary : 

VNC2 to VNC1L Summary USB processing moved to hardware, freeing up CPU cycles 48-pin LQFP backwards compatible with VNC1L

Target Applications : 

VNC2 is targeted to provide powerful USB connectivity with processing capabilities for an embedded application. Wide range of applications. Adding USB Host capability to an embedded product. Connect a USB Flash drive to MCU/PLD/FPGA – data storage and firmware updates. USB Flash drive / SD card interfaces. VNC2 approach offers significant advantages over using a device with integrated USB. USB interfaces are commonly software based implementations which are lower performance. Customers need to develop and maintain USB drivers. Target Applications

VNC2: Typical Applications : 

Consumer Electronics USB Flash drive data storage or firmware updates. Digital camera to USB Flash drive or similar USB client device interface. MP3 Player to USB Flash drive or other USB client device interface. Provide connectivity to iPOD / iPhone style devices. TV, PVR, Set Top Box – USB Flash drive. USB webcam interfacing Flash drive to SD Card data transfer. Health monitors – Sports watches, training aids. VNC2: Typical Applications

VNC2: Typical Applications : 

Communications Wireless Interfaces – 3G / Bluetooth. USB wireless process controller. Telecom system calls logging to replace printer log. Mobile phone to USB Flash drive. GPS to mobile phone interface. GPS tracker with USB Flash disk storage. Geo-tagging of photos – GPS location linked to image. Industrial & Medical Instrumentation USB Flash drive. Smart meters. Data-logger USB Flash drive. Scanners and cameras. …… more VNC2: Typical Applications

VNC2 Application Examples : 

VNC2 Application Examples VMUSIC - VNC1L based design. MCU can reads music files from flash disk via VNC1L MCU controls playback via VNC1L via SPI interface. Support via VMSC firmware

VNC2 Application Examples : 

VNC2 Application Examples VMUSIC – VNC2 Upgraded Design. VNC2 replaces VNC1L and MCU to provide music playback and control New interfaces add extra capability, eg OLED display. VNC2 replaces VNC1L and MCU.

VNC2 Application Examples : 

VNC2 Application Examples GPS Module Design. VNC2 connects to GPS receiver. GPS data can be sent to USB Flash disk or to a PC for analysis using Map software. Other USB connection can be used for communications connectivity. GPS Logging featured in Vinculum Software Examples

VNC2 Development Modules : 

VNC2 Development Modules V2-EVAL Complete evaluation and prototyping kit. 2 x USB type ‘A’ connectors, headers for access to interfaces, external power supply and prototyping area. VNC2 accessed via daughterboard site. V2DIP1/V2DIP2 Modules Compact, easy-to-integrate modules 0.1” pitch headers provide access to VNC2 device interfaces. VNC2 Debug Module Designed for loading and debugging firmware on VNC2

Device Schedule : 

Device Schedule VNC2 Rev A devices samples available now. Evaluation boards stock: V2_EVAL board with various daughter boards. V2DIP1 / V2DIP2 modules. VNC2 Debug module. VNC2 Rev B devices available in September.

Summary : 

VNC2 is the second generation of FTDI’s Vinculum family of dual USB Host Controllers VNC2 provides a cost effective solution for providing USB interfacing and processing capability for embedded applications. Range of flexible connectivity interfaces for interconnecting to external systems. Extensive set of Tools, Firmware and Libraries (all FOC) providing ready-to-use USB connectivity for a range of applications. Complete USB solution. Summary

Summary : 

VNC2 is available in 32/48/64-pin Pb-free (RoHS compliant) LQFP and QFN packages. VNC2 silicon samples and evaluation boards available now Large number of firmware samples and application notes available on FTDI website. Summary

Slide 27: 

27 Thank You