April 20, 2005
© Cypress Semiconductor Corp. 2004-2005 — Document No. 38-12025 Rev. *G
1
PSoC™ Mixed-Signal Array
Final Data Sheet
CY8C21234, CY8C21334,
CY8C21434, CY8C21534, and CY8C21634
PSoC™ Functional Overview
The PSoC™ family consists of many Mixed-Signal Array with
On-Chip Controller devices. 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, as well as programmable interconnect. This architecture
allows the user to create customized peripheral configurations,
to match the requirements of each individual application. Addi-
tionally, a fast CPU, Flash program memory, SRAM data mem-
ory, and configurable IO are included in a range of convenient
pinouts.
The PSoC architecture, as illustrated on the left, is comprised of
four main areas: the Core, the System Resources, the Digital
System, and the Analog System. Configurable global bus
resources allow all the device resources to be combined into a
complete custom system. Each CY8C21x34 PSoC device
includes four digital blocks and four analog blocks. Depending
on the PSoC package, up to 28 general purpose IO (GPIO) are
also included. The GPIO provide access to the global digital
and analog interconnects.
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 IMO (inter-
nal main oscillator) and ILO (internal low speed oscillator). The
Features
■ Powerful Harvard Architecture Processor
❐ M8C Processor Speeds to 24 MHz
❐ Low Power at High Speed
❐ 2.4V to 5.25V Operating Voltage
❐ Operating Voltages Down to 1.0V Using
On-Chip Switch Mode Pump (SMP)
❐ Industrial Temperature Range: -40°C to +85°C
■ Advanced Peripherals (PSoC Blocks)
❐ 4 Analog Type “E” PSoC Blocks Provide:
- 2 Comparators with DAC Refs
- Single or Dual 8-Bit 28 Channel ADC
❐ 4 Digital PSoC Blocks Provide:
- 8- to 32-Bit Timers, Counters, and PWMs
- CRC and PRS Modules
- Full-Duplex UART, SPI
™ Master or Slave
- Connectable to All GPIO Pins
❐ Complex Peripherals by Combining Blocks
■ Flexible On-Chip Memory
❐ 8K Flash Program Storage 50,000 Erase/Write
Cycles
❐ 512 Bytes SRAM Data Storage
❐ In-System Serial Programming (ISSP
™)
❐ Partial Flash Updates
❐ Flexible Protection Modes
❐ EEPROM Emulation in Flash
■ Complete Development Tools
❐ Free Development Software
(PSoC™ Designer)
❐ Full-Featured, In-Circuit Emulator and
Programmer
❐ Full Speed Emulation
❐ Complex Breakpoint Structure
❐ 128K Trace Memory
■ Precision, Programmable Clocking
❐ Internal ±2.5% 24/48 MHz Oscillator
❐ Internal Oscillator for Watchdog and Sleep
■ Programmable Pin Configurations
❐ 25 mA Drive on All GPIO
❐ Pull Up, Pull Down, High Z, Strong, or Open
Drain Drive Modes on All GPIO
❐ Up to 8 Analog Inputs on GPIO
❐ Configurable Interrupt on All GPIO
■ Versatile Analog Mux
❐ Common Internal Analog Bus
❐ Simultaneous Connection of IO Combinations
❐ Capacitive Sensing Application Capability
■ Additional System Resources
❐ I2C™ Master, Slave and Multi-Master to
400 kHz
❐ Watchdog and Sleep Timers
❐ User-Configurable Low Voltage Detection
❐ Integrated Supervisory Circuit
❐ On-Chip Precision Voltage Reference
DIGITAL SYSTEM
SRAM
512 Bytes
SystemBus
Interrupt
Controller
Clock Sources
(Includes IMO and ILO)
Global
Digital
Interconnect
Global Analog Interconnect
PSoC
CORE
CPUCore
(M8C)
SROM
Flash 8K
SYSTEM RESOURCES
ANALOG SYSTEM
Analog
Ref.
Digital
Clocks
I2C
POR and LVD
System Resets
Internal
Voltage
Ref.
Sw itch
Mode
Pump
Port 1
Port 0
Sleep and
Watchdog
Analog
Mux
Port 3
Port 2
Analog
PSoC
Block
Array
Digital
PSoC
Block
Array
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