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April 14, 2005
Cypress Semiconductor Corp. 2004-2005 — Document No. 38-12018 Rev. *F
1
PSoC Mixed-Signal Array
Final Data Sheet
CY8C24794
PSoC Functional Overview
The PSoC family consists of many
Mixed-Signal Array with
On-Chip Controller
devices. All PSoC family devices are
designed to replace traditional MCUs, system ICs, and the
numerous discrete components that surround them. The PSoC
CY8C24794 device is a unique member of the PSoC family
because it includes a full-featured, full-speed (12 Mbps) USB
port. Configurable analog, digital, and interconnect circuitry
enable a high level of integration in a host of industrial, con-
sumer, and communication applications.
This architecture allows the user to create customized periph-
eral configurations that match the requirements of each individ-
ual application. Additionally, a fast CPU, Flash program
memory, SRAM data memory, and configurable IO are included
in a range of convenient pinouts and packages.
The PSoC architecture, as illustrated on the left, is comprised of
four main areas: PSoC Core, Digital System, Analog System,
and System Resources including a full-speed USB port. Config-
urable global busing allows all the device resources to be com-
bined into a complete custom system. The PSoC CY8C24794
device can have up to seven IO ports that connect to the global
digital and analog interconnects, providing access to 4 digital
blocks and 6 analog blocks.
Features
■
Powerful Harvard Architecture Processor
M8C Processor Speeds to 24 MHz
Two 8x8 Multiply, 32-Bit Accumulate
Low Power at High Speed
3.0 to 5.25V Operating Voltage
Industrial Temperature Range: -40°C to +85°C
USB Temperature Range: -10°C to +85°C
■
Advanced Peripherals (PSoC Blocks)
6 Rail-to-Rail Analog PSoC Blocks Provide:
- Up to 14-Bit ADCs
- Up to 9-Bit DACs
- Programmable Gain Amplifiers
- Programmable Filters and Comparators
4 Digital PSoC Blocks Provide:
- 8- to 32-Bit Timers, Counters, and PWMs
- CRC and PRS Modules
- Full-Duplex UART
- Multiple SPI
Masters or Slaves
- Connectable to all GPIO Pins
Complex Peripherals by Combining Blocks
Capacitive Sensing Application Capability
■
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
■
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
■
Programmable Pin Configurations
25 mA Sink on all GPIO
Pull up, Pull down, High Z, Strong, or Open
Drain Drive Modes on all GPIO
Up to 48 Analog Inputs on GPIO
Two 33 mA Analog Outputs on GPIO
Configurable Interrupt on all GPIO
■
Precision, Programmable Clocking
Internal ±4% 24/48 MHz Oscillator
Internal Oscillator for Watchdog and Sleep
.25% Accuracy for USB with no External
Components
■
Additional System Resources
I
2
C
Slave, Master, and Multi-Master to
400 kHz
Watchdog and Sleep Timers
User-Configurable Low Voltage Detection
Integrated Supervisory Circuit
On-Chip Precision Voltage Reference
■
Complete Development Tools
Free Development Software
(PSoC Designer)
Full-Featured, In-Circuit Emulator and
Programmer
Full Speed Emulation
Complex Breakpoint Structure
128K Bytes Trace Memory
DIGITAL SYSTEM
SRAM
1K
Interrupt
Controller
Sleep and
Watchdog
Clock Sources
(Includes IMO and ILO)
Global Digital Interconnect
Global Analog Interconnect
PSoC CORE
CPU Core (M8C)
SROM
Flash 16K
Digital
Block
Array
Digital
Clocks
SYSTEM RESOURCES
ANALOG SYSTEM
Analog
Ref.
Port 5
Port 4
Port 3
Port 2
Port 1
Port 0Drivers
Analog
Block
Array
Internal
Voltage
Ref.
POR and LVD
System Resets
2
MACs
Decimator
Type 2
I2C
USB
Port 7
S
Analog
Input
Muxing