Cypress CY3269N照明解决方案 - 消费电子 - 电子工程网
Cypress 公司的CY3269N照明开发方案采用CY8CLED04 EZ-Color HB LED 控制器,用来开发智能的LED照明,用户采用手指触摸能开发出从整个房间到大型建筑物的照明显示,具有暖色,中色或冷白光的可变色彩温度,目标应用在LCD背光,通用照明,建筑物照明和大型显示屏等.本文介绍了CY8CLED04 HB LED 控制器主要特性,逻辑框图,以及CY3269N照明开发套件,开发板电路图和材料清单.
Cypress’s EZ-Color family of devices offers the ideal control solution for high brightness LED applications requiring intelligent dimming control. EZ-Color devices combine the power and flexibility of Programmable System-on-Chip (PSoC reg;); with Cypress’s precise illumination signal modulation (PrISM ) modulation technology providing lighting designers a fully customizable and integrated lighting solution platform.
The EZ-Color family supports a range of independent LED channels from 4 channels at 32 bits of resolution each, up to 16 channels at 8 bits of resolution each. This enables lighting designers the flexibility to choose the LED array size and color quality. PSoC Designer software, with lighting specific drivers, can significantly cut development time and simplify implementation of fixed color points through temperature, optical, and LED binning compensation. EZ-Color’s virtually limitless analog and digital customization enable simple integration of features in addition to intelligent lighting, such as CapSense, battery charging, image stabilization, and motor control during the development process. These features, along with Cypress’s best-in-class quality and design support, make EZ-Color the ideal choice for intelligent HB LED control applications.
■ HB LED Controller
Configurable dimmers support up to four independent LED channels
8- to 32-bits of resolution per channel
Dynamic reconfiguration enables led controller plus other features: CapSense reg;, Battery Charging, and Motor Control
■ Visual embedded design
■ PrISM modulation technology
Reduces radiated EMI
Reduces low frequency blinking
■ Advanced peripherals (PSoC reg; blocks)
Four digital PSoC blocks provide:
8 to 32-bit timers, counters, and PWMs
Multiple SPI Masters or Slaves
Connectable to all GPIO pins
Six Rail-to-Rail analog PSoC blocks provide:
Up to 14-bit ADCs
Up to 9-bit DACs
Programmable gain amplifiers (PGA)
Programmable filters and comparators
Complex peripherals by combining blocks
Capacitive sensing application capability
■ Complete development tools
Free development software
Full featured, in-circuit emulator (ICE) and programmer
Full speed emulation
Complex breakpoint structure
128 KB trace memory
■ Programmable pin configurations
25 mA sink, 10 mA source on all GPIO
Pull-up, pull-down, high Z, strong, or open drain drive modes on all GPIO
Up to 12 analog inputs on GPIO
Four 30 mA analog outputs on GPIO
Configurable interrupt on all GPIO
■ Flexible on-chip memory
16K flash program storage 50,000 erase/write cycles
1K SRAM data storage
In-system serial programming (ISSP)
Partial flash updates
Flexible protection modes
EEPROM emulation in flash
■ Full speed USB (12 Mbps)
Four uni-directional endpoints
One bi-directional control endpoint
USB 2.0 compliant
Dedicated 256 byte buffer
No external crystal required
■ LCD Backlight
■ Large Signs
■ General Lighting
■ Architectural Lighting
■ Camera/Cell Phone Flash
The PSoC Core
The PSoC Core is a powerful engine that supports a rich feature set. The core includes a CPU, memory, clocks, and configurable General Purpose I/O (GPIO).
The M8C CPU core is a powerful processor with speeds up to 68 MHz, providing a four MIPS 8-bit Harvard-architecture microprocessor. The CPU uses an interrupt controller with up to 20 vectors, to simplify programming of real time embedded events. Program execution is timed and protected using the included Sleep and watchdog timers (WDT).
Memory encompasses 16K of flash for program storage, 1K of SRAM for data storage, and up to 2K of EEPROM emulated using the flash. Program flash uses four protection levels on blocks of 64 bytes, allowing customized software IP protection.
The EZ-Color family incorporates flexible internal clock generators, including a 24 MHz internal main oscillator (IMO) accurate to 8 percent over temperature and voltage. The 24 MHz IMO can also be doubled to 48 MHz for use by the digital system.
A low power 32 kHz internal low speed oscillator (ILO) is provided for the sleep timer and WDT. The clocks, together with programmable clock dividers (as a system resource), provide the flexibility to integrate almost any timing requirement into the EZ-Color device. In USB systems, the IMO self-tunes to ± 0.25% accuracy for USB communication.
EZ-Color GPIOs provide connection to the CPU, digital and analog resources of the device. Each pin’s drive mode may be selected from eight options, allowing great flexibility in external interfacing. Every pin can also generate a system interrupt on high level, low level, and change from last read.