USB OTG and touchscreen for 32-bit embedded designs

To empower a new generation of embedded entry-level Human-Machine Interface (HMI) systems in the industrial world Freescale has launched the new ColdFire® MCF5227x family based on the established ColdFire V2 core running up to 160MHz. The part integrates an LCD controller capable of supporting graphical LCD panels up to SVGA resolution.

A unique feature of this part is the ADC supporting true touchscreen capability. A USB OTG module on-chip also assures easy connection to external input and output peripherals without requiring a host PC. In addition, there is an embedded CAN controller to allow for connection to one of the industry’s most popular networking protocols.

The combination of the LCD controller with the ADC on-chip, supported with up to 128kbyte of SRAM, delivers a unique solution for low- to mid-range HMI systems. Through real hardware support, the MCF5227x minimises the total memory capacity required. In turn, this reduces component count and system cost to enable an optimal solution for graphical touchscreens in embedded applications.

The touchscreen controller is implemented using an 8-channel, 12-bit ADC, and supports 4-, 5-, 7-, or 8-wire resistive touch sensors.

Alternatively, the ADC can be used as a general-purpose converter in a pure signal-conditioning role. The accompanying LCD controller supports single-screen monochrome and colour displays up to 4096 x 4096 pixels resolution.

Initially the MCF5227x is being offered in a 196-pin BGA package with up to 55 General Purpose I/O (GPIO).

Further peripherals enhance connectivity, including a FlexCAN module, three UARTs, a DMA SPI (DSPI), an I²C module and a Synchronous Serial Interface (SSI) for audio-codec support.

For high-speed processing and communications, there is an Enhanced Multiply- Accumulate unit (EMAC) for DSP and fast-multiply operations, as well as a hardware-divide unit supporting various 32-bit operations. There is also a 16-channel DMA controller and a crossbar switch enabling concurrent access to peripherals or RAM from multiple bus masters.

 

FEATURES 8kbyte on-chip cache 128kbyte dual-port SRAM FlexBus interface SDRAM controller Supports booting from SPI-compatible memories

APPLICATIONS Security systems Point-of-Sale (POS) equipment Test and measurement equipment Data loggers Intelligent-building controllers

 

 

 

• Future Electronics’ PSoC Dart Starter Board, page 080613

 

• austriamicrosystems’ AS1340 boost converter, page 080618
• Zetex Semiconductors’ ZXMN series MOSFETs, page 080620

 

 

Development board M52277EVB is available to members of the Future Board Club. To apply for the development board, and membership of the Board Club, go to www.my-boardclub.com/manf-offers.htm This offer is free and subject to qualification.

 

Freescale Semiconductor / MCF5227x