原标题：ST STEVAL-CCM004V2 TFT LCD平板显示器控制方案

　　ST公司的STM32F20x系列是高性能的ARM® Cortex™-M3 32位RISC核MCU,工作频率高达120MHz,集成了高速嵌入存储器(闪存高达1MB,SRAM高达128KB),高达4KB备用SRAM,以及各种增强I/O和外设,连接到两个APB总线,三个AHB总线和32位多个AHB总线矩阵,主要应用在工业如PLC,逆变器,工业网络等;医疗电子如病人监护,手持医疗设备等;建筑物和安防系统如告警系统,HVAC,动力表等以及家用电器如三相马达驱动器,应用控制和用户接口等.本文介绍了 STM32F20x主要特性和框图,以及用于STM3220F-EVAL的STEVAL-CCM004V2 TFT LCD平板显示器控制板的主要特性,电路图和材料清单.

　　The STM32F20x family is based on the high-performance ARM® Cortex™-M3 32-bit RISC core operating at a frequency of up to 120 MHz. The family incorporates high-speed embedded memories (Flash memory up to 1 Mbyte, up to 128 Kbytes of system SRAM), up to 4 Kbytes of backup SRAM, and an extensive range of enhanced I/Os and peripherals connected to two APB buses, three AHB buses and a 32-bit multi-AHB bus matrix.

　　The devices also feature an adaptive real-time memory accelerator (ART Accelerator™)which allows to achieve a performance equivalent to 0 wait state program execution from Flash memory at a CPU frequency up to 120 MHz. This performance has been validated using the CoreMark benchmark.

　　All devices offer three 12-bit ADCs, two DACs, a low-power RTC, twelve general-purpose 16-bit timers including two PWM timers for motor control, two general-purpose 32-bit timers,a true number random generator (RNG). They also feature standard and advanced communication interfaces. New advanced peripherals include an SDIO, an enhanced flexible static memory control (FSMC) interface (for devices offered in packages of 100 pinsand more), and a camera interface for CMOS sensors. The devices also feature standard peripherals.

　　• Up to three I2Cs

　　• Three SPIs, two I2Ss.To achieve audio class accuracy, the I2S peripherals can be clocked via a dedicated internal audio PLL or via an external PLL to allow synchronization.

　　• 4 USARTs and 2 UARTs

　　• A USB OTG high-speed with full-speed capability (with the ULPI)

　　• A second USB OTG (full-speed)

　　• Two CANs

　　• An SDIO interface

　　• Ethernet and camera interface available on STM32F207xx devices only.

　　STM32F205xx and STM32F207xx devices are offered in various packages ranging from 64 pins to 176 pins. The set of included peripherals changes with the device chosen.These features make the STM32F205xx and STM32F207xx microcontroller family suitable for a wide range of applications:

　　• Motor drive and application control

　　• Medical equipment

　　• Industrial applications: PLC, inverters, circuit breakers

　　• Printers, and scanners

　　• Alarm systems, video intercom, and HVAC

　　• Home audio appliances

　　STM32F20x 主要特性:

　　• Core: ARM 32-bit Cort ex™-M3 CPU (120 MHz max) with Adaptive real-time accelerator (ART Accelerator™ allowing 0-wait state execution performance from Flash memory, MPU, 150 DMIPS/1.25 DMIPS/MHz (Dhrystone 2.1)

　　• Memories

　　– Up to 1 Mbyte of Flash memory

　　– 512 bytes of OTP memory

　　– Up to 128 + 4 Kbytes of SRAM

　　– Flexible static memory controller that supports Compact Flash, SRAM, PSRAM, NOR and NAND memories

　　– LCD parallel interface, 8080/6800 modes

　　Clock, reset and supply management

　　– From 1.8 to 3.6 V application supply+I/Os

　　– POR, PDR, PVD and BOR

　　– 4 to 26 MHz crystal oscillator

　　– Internal 16 MHz factory-trimmed RC

　　– 32 kHz oscillator for RTC with calibration

　　– Internal 32 kHz RC with calibration

　　•Low power

　　– Sleep, Stop and Standby modes

　　–VBAT supply for RTC, 20 × 32 bit backup registers, and optional 4 KB backup SRAM

　　•3 × 12-bit, 0.5 μs ADCs with up to 24 channels and up to 6 MSPS in triple interleaved mode

　　•2 × 12-bit D/A converters

　　•General-purpose DMA: 16-stream controller with centralized FIFOs and burst support

　　•Up to 17 timers

　　– Up to twelve 16-bit and two 32-bit timers, up to 120 MHz, each with up to 4 IC/OC/PWM or pulse counter and quadrature (incremental) encoder input

　　•Debug mode: Serial wire debug (SWD), JTAG, and Cortex-M3 Embedded Trace Macrocell™

　　•Up to 140 I/O ports with interrupt capability:

　　– Up to 136 fast I/Os up to 60 MHz

　　– Up to 138 5 V-tolerant I/Os

　　•Up to 15 communication interfaces

　　– Up to 3 × I2C interfaces (SMBus/PMBus)

　　– Up to 4 USARTs and 2 UARTs (7.5 Mbit/s, ISO 7816 interface, LIN, IrDA, modem ctrl)

　　– Up to 3 SPIs (30 Mbit/s), 2 with muxed I2S to achieve audio class accuracy via audio PLL or external PLL

　　– 2 × CAN interfaces (2.0B Active)

　　– SDIO interface

　　•Advanced connectivity

　　– USB 2.0 full-speed device/host/OTG controller with on-chip PHY

　　– USB 2.0 high-speed/full-speed device/host/OTG controller with dedicated DMA, on-chip full-speed PHY and ULPI

　　– 10/100 Ethernet MAC with dedicated DMA: supports IEEE 1588v2 hardware, MII/RMII

　　•8- to 14-bit paralle

　　l camera interface (48 Mbyte/s max.)

　　–CRC calculation unit

　　• 96-bit unique ID

　　图1. STM32F20x框图

　　STEVAL-CCM004V2评估板

　　The purpose of the STEVAL-CCM004V2 evaluation board is to demonstrate the STM32F2x capabilities of the high performance Flexible Static Memory Controller (FSMC) interface to drive a TFT LCD.

　　A 3.5" QVGA resolution TFT-LCD panel is interfaced with the STM32 FSMC peripheral.

　　The STEVAL–CCM004V2 board is designed to be interfaced as daughter board for the STM32F20x -EVAL evaluation Kit

　　TFT LCD panel controller demo board based on STM3220F-EVAL

　　The STEVAL-CCM004V2 demonstration board demonstrates the capabilities of high performance Flexible Static Memory Interface (FSMC) of STM32F2x for driving TFT-LCD.

　　3.5" QVGA resolution TFT-LCD panel is interfaced with STM32 FSMC peripheral.

　　The STEVAL-CCM004V2 board is designed to be interfaced as daughter board for the STM320G-EVAL kit.

　　STEVAL-CCM004V2评估板主要特性:

　　• Direct RGB signal driving using STM32 without on-chip controller requirement

　　• STM3220G-EVAL based plug-in daughter board for feature extensibility

　　• Ready to use Graphic library APIs for easy GUI design

　　• Real-time camera image streaming to showcase the driver performance with frame rate 30fps.

　　• On-board constant current drive circuit for LED based TFT-LCD Backlight

　　• Static image display with refresh rate of 60 frames per second

　　• Touch Screen and Joystick controlled Cursor capability

　　图3. STEVAL-CCM004V2评估板外形图