Cypress CY8C24894超声波倒车系统解决方案

Cypress公司的超声波倒车系统采用CY8C24894 PSoC系列器件,可以实现四路超声波测距系统(超声波传感器和任何接近物体的距离).本文介绍了超声波倒车系统的框图以及所采用的汽车器件CY8C24894主要特性,方框图, CY3214-PSoCEVALUSB评估套件主要特性,框图,电路图,材料清单和PCB布局图.
Automotive PSoC® Programmable System-on-Chip
The PSoC family consists of many Programmable System-on-Chip with on-chip controller devices. All PSoC family devices are designed to replace traditional microcontroller units(MCUs), system ICs, and the numerous discrete components that surround them. Configurable analog, digital, and interconnect circuitry enable a high level of integration in a host of industrial, consumer, and communication applications.
This architecture allows the user to create customized peripheral configurations that match the requirements of each individual application. Additionally, a fast CPU, Flash program memory, SRAM data memory, and configurable I/O are included in a range of convenient pinouts and packages.
The PSoC architecture is comprised of four main areas: PSoc Core, digital system, analog system, and system resources. Configurable global busing allows all the device resources to be combined into a complete custom system. The PSoC CY8C24x94 devices can have up to seven I/O ports that connect to the global digital and analog interconnects, providing access to four digital blocks and six analog blocks.
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 GPIOs.
The M8C CPU core is a powerful processor with speeds up to 24 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 timer and watchdog timer (WDT).
Memory encompasses 16 KB of flash for program storage, 1 KB of SRAM f...