Cypress Semiconductor CY8C24094 Bedienungsanleitung PDF herunterladen (Seite 3)

CY8C24094, CY8C24794

CY8C24894, CY8C24994

Document Number: 38-12018 Rev. AD Page 3 of 61

4. PSoC Functional Overview

The PSoC family consists of many devices with on-chip

controllers. These devices are designed to replace multiple

traditional MCU-based system components with one low-cost

single-chip programmable component. A PSoC device includes

configurable blocks of analog and digital logic, and

programmable interconnect. This architecture makes it possible

for you to create customized peripheral configurations, to 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.

The PSoC architecture, shown in “Logic Block Diagram” on

page 1, consists of four main areas: the core, the system

resources, the digital system, and the analog system.

Configurable global bus resources allow combining all of the

device resources into a complete custom system. Each

CY8C24x94 PSoC device includes four digital blocks and six

analog blocks. Depending on the PSoC package, up to 56

GPIOs are also included. The GPIOs provide access to the

global digital and analog interconnects.

4.1 The PSoC Core

The PSoC core is a powerful engine that supports a rich

instruction set. It encompasses SRAM for data storage, an

interrupt controller, sleep and watchdog timers, and internal main

oscillator (IMO) and internal low-speed oscillator (ILO). The CPU

core, called the M8C, is a powerful processor with speeds up to

24 MHz. The M8C is a four-million instructions per second

(MIPS) 8-bit Harvard-architecture microprocessor.

System resources provide these additional capabilities:

■ Digital clocks for increased flexibility

■ I

C functionality to implement an I

C master and slave

■ An internal voltage reference, multi-master, that provides an

absolute value of 1.3 V to a number of PSoC subsystems

■ A switch-mode pump (SMP) that generates normal operating

voltages from a single battery cell

■ Various system resets supported by the M8C

The digital system consists of an array of digital PSoC blocks that

may be configured into any number of digital peripherals. The

digital blocks are connected to the GPIOs through a series of

global buses. These buses can route any signal to any pin,

freeing designs from the constraints of a fixed peripheral

controller.

The analog system consists of six analog PSoC blocks,

supporting comparators, and analog-to-digital conversion up to

10-bits of precision.

4.2 The Digital System

The digital system consists of four digital PSoC blocks. Each

block is an 8-bit resource that is used alone or combined with

other blocks to form 8-, 16-, 24-, and 32-bit peripherals, which

are called user modules. 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

■ SPI master and slave

■ I

C slave and multi-master

■ CRC/generator (8-bit)

■ IrDA

■ PRS generators (8- to 32-bit)

The digital blocks are connected to any GPIO through a series

of global buses that can route any signal to any pin. The buses

also allow for signal multiplexing and for performing logic

operations. This configurability frees your designs from the

constraints of a fixed peripheral controller.

Digital blocks are provided in rows of four, where the number of

blocks varies by PSoC device family. This allows the optimum

choice of system resources for your application. Family

resources are shown in Table 1 on page 5.

Figure 1. Digital System Block Diagram

DIGITAL SYSTEM

To System Bus

Digital PSoC Block Array

To Analog

System

Row Input

Configuration

Row Output

Configuration

Row 0

DBB00 DBB01 DCB02 DCB03

GIE[7:0]

GIO[7:0]

GOE[7:0]

GOO[7:0]

Global Digital

Interconnect

Port 1

Port 0

Port 3

Port 2

Port 5

Port 4

Port 7

1 2 3 4 5 6 7 8 ... 60 61

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