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CY8C27643-24LFXIT Datasheet(PDF) 3 Page - Cypress Semiconductor |
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CY8C27643-24LFXIT Datasheet(HTML) 3 Page - Cypress Semiconductor |
3 / 44 page CY8C27143, CY8C27243 CY8C27443, CY8C27543 CY8C27643 Document Number: 38-12012 Rev. *T Page 3 of 63 PSoC Functional Overview The PSoC family consists of many programmable system-on-chip controller devices. These devices are designed to replace multiple traditional microcontroller unit (MCU)-based system components with one, low-cost single-chip programmable device. PSoC devices include configurable blocks of analog and digital logic, as well as programmable interconnects. This architecture lets you to create customized peripheral configurations that match the requirements of each individual application. Additionally, a fast central processing unit (CPU), flash program memory, SRAM data memory, and configurable I/O are included in a range of convenient pinouts and packages. The PSoC architecture, as illustrated in Logic Block Diagram on page 1, consists 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 CY8C27x43 family can have up to five I/O ports that connect to the global digital and analog interconnects, providing access to eight digital blocks and 12 analog blocks. PSoC Core The PSoC core is a powerful engine that supports a rich feature set. The core includes a CPU, memory, clocks, and configurable GPIO. 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 17 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 16 KB of flash for program storage, 256 bytes of SRAM for data storage, and up to 2 K of EEPROM emulated using the flash. Program flash uses four protection levels on blocks of 64 bytes, allowing customized software IP protection. The PSoC device incorporates flexible internal clock generators, including a 24-MHz internal main oscillator (IMO) accurate to 2.5% 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. If crystal accuracy is desired, the 32.768-kHz external crystal oscillator (ECO) is available for use as a Real Time Clock (RTC) and can optionally generate a crystal-accurate 24-MHz system clock using a PLL. The clocks, together with programmable clock dividers (as a system resource), provide the flexibility to integrate almost any timing requirement into the PSoC device. PSoC 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 also has the capability to generate a system interrupt on high level, low level, and change from last read. Digital System The digital system is composed of eight digital PSoC blocks. Each block is an 8-bit resource that can be used alone or combined with other blocks to form 8-, 16-, 24-, and 32-bit peripherals, which are called user modules. Figure 1. Digital System Block Diagram Digital peripheral configurations include: ■ PWMs (8- to 32-bit) ■ PWMs with dead band (8- to 32-bit) ■ Counters (8- to 32-bit) ■ Timers (8- to 32-bit) ■ UART 8-bit with selectable parity (up to two) ■ SPI slave and master (up to two) ■ I2C slave and multi-master (one available as a system resource) ■ CRC/generator (8- to 32-bit) ■ IrDA (up to two) ■ Pseudo random sequence (PRS) generators (8- to 32-bit) DIGITAL SYSTEM To SystemBus DigitalClocks FromCore Digital PSoC Block Array ToAnalog System 8 8 8 8 Row 1 DBB10 DBB11 DCB12 DCB13 4 4 Row 0 DBB00 DBB01 DCB02 DCB03 4 4 GIE[7:0] GIO[7:0] GOE[7:0] GOO[7:0] Global Digital Interconnect Port 4 Port 3 Port 2 Port 1 Port 0 Port 5 [+] Feedback |
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