Features
CPU Features
| • | Fully static RISC processor core, capable of operating
from 0 to 24 MHz with zero wait/hold states |
| • | Minimum 41.7 ns instruction cycle time with a 24-MHz internal
clock frequency, based on a 12-MHz external input |
| • | 47 independently vectored peripheral interrupts |
On-Chip Memory
| • | 256K bytes reprogrammable Flash program memory |
| • | 8K bytes Flash data memory |
| • | 32K bytes of static RAM data memory |
| • | Addresses up to 12M bytes of external memory |
Broad Range of Hardware Communications Peripherals
| • | Universal Serial Bus (USB) 1.1 full-speed node |
| • | ACCESS.bus serial bus (compatible with Philips I2C bus) |
| • | Dual CAN interface with 15 message buffers conforming
to CAN specification 2.0B active |
| • | 8/16-bit SPI, Microwire/Plus serial interface |
| • | Four-channel Universal Asynchronous Receiver/Transmitter
(UART), one channel has USART capability |
| • | Advanced Audio Interface (AAI) to connect to external 8/
13-bit PCM Codecs as well as to ISDN-Controllers
through the IOM-2 interface (slave only) |
| • | CVSD/PCM converter supporting one bidirectional audio
connection |
General-Purpose Hardware Peripherals
| • | 12-bit A/D Converter (ADC) |
| • | Dual 16-bit Multi-Function Timer (MFT)
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| • | Versatile Timer Unit with four subsystems (VTU)
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| • | Four-channel DMA controller
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| • | Timing and Watchdog Unit
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| • | Random Number Generator peripheral
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Extensive Power and Clock Management Support
| • | On-chip Phase Locked Loop
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| • | Support for multiple clock options
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| • | Dual clock and reset |
| • | Power-down modes |
Flexible I/O
| • | Up to 54 general-purpose I/O pins (shared with on-chip
peripheral I/O) |
| • | Programmable I/O pin characteristics: TRI-STATE output,
push-pull output, weak pull-up input, high-impedance
input |
| • | Schmitt triggers on general-purpose inputs |
| • | Multi-Input Wake-Up (MIWU) capability |
Power Supply
| • | I/O port operation at 2.5V to 3.3V |
| • | Core logic operation at 2.5V |
| • | On-chip power-on reset |
Temperature Range
| • | -40?C to +85?C (Industrial) |
Packages
| • | LQFP-128, LQFP-144 |
Complete Development Environment
| • | Pre-integrated hardware and software support for rapid prototyping and production |
| • | Integrated environment |
| • | Project manager |
| • | Multi-file C source editor |
| • | High-level C source debugger |
| • | Comprehensive, integrated, one-stop technical support |
Description The CP3UB26 connectivity processor combines high performance
with the massive integration needed for embed- held and portable applications.
ded applications. A powerful RISC core with on-chip SRAM
and Flash memory provides high computing bandwidth,
hardware communications peripherals provide high-I/O
bandwidth, and an external bus provides system expandability.
On-chip communications peripherals include: Universal Serial
Bus (USB) 1.1 node, CAN, Microwire/Plus, SPI, ACCESS.
bus, quad UART, 12-bit A/D converter, and Advanced
Audio Interface (AAI). Additional on-chip peripherals include
Random Number Generator (RNG), DMA controller, CVSD/
PCM conversion module, Timing and Watchdog Unit, Versatile
Timer Unit, Multi-Function Timer, and Multi-Input
Wake-Up (MIWU) unit.
Hand-held devices can be both smaller and lower in cost for
maximum consumer appeal. The low voltage and advanced
power-saving modes achieve new design points in the trade-off between battery size and operating time for hand-held and portable applications.
In addition to providing the features needed for the next generation
of embedded products, the CP3UB26 is backed up
by the software resources designers need for rapid time-tomarket,
including an operating system, peripheral drivers,
reference designs, and an integrated development environment.
National Semiconductor offers a complete and industryproven
application development environment for CP3UB26
applications, including the IAR Embedded Workbench,
iSYSTEM winIDEA and iC3000 Active Emulator, Development
Board, and Application Software.
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