Digital IP Cores
and Subsystems

Our family of microcontroller and microprocessor related cores includes capable and competitive 32-bit BA22s and the best-available set of proven 8051s.

32-bit Processors
BA2x Family Overview

Secure Processors
Geon - Protected Execution

Application Processors
BA25 Adv. App. Processor
BA22 Basic App. Processor

Cache-Enabled Embedded
BA22 Cache-Embedded

Embedded Processors
BA22 Deeply Embedded
BA21 Low Power
BA20 PipelineZero

Processor-Based AMBA® Subsystems
Family Overview
AHB Low-Power
AHB Performance/Low-Power
AXI Custom Performance

AMBA Bus Infrastructure Cores
See Peripherals Cores >

Efficiently compress media or data with these high-performance hardware codecs. See the video and image compression Family Page for a media compression overview.

 H.264 Video Decoders
Low Latency Constrained
  Baseline Profile

Low-Power Constrained
  Baseline Profile

 H.265 HEVC Decoders
Main Profile

Companion Cores
Image Processing
CAMFE Camera Processor
Network Stacks
40G UDPIP Stack
1G/10G UDPIP Stack
• Hardware RTP Stack
  – for H.264
  – for JPEG
IEEE 802.1AS Time Sync.

IEEE 802.1Qav & 802.1Qbv

• MPEG Transport Stream

JPEG Still & Motion

Lossless & Near-Lossless

Lossless Data Compression
GZIP Compressor
GUNZIP Decompressor
GZIP Reference Designs
    • for Intel FPGAs
    • for Xiinx FPGAs

Easily integrate memories, peripherals, and hardware networking stacks into SoCs.

Display Controllers

Device Controllers
smart card reader

Flash Controllers
Parallel Flash
Parallel Flash for AHB
Serial NOR/NAND Flash
Octal, XIP, DMA for AHB
Octal, XIP for AHB
Quad, XIP for AHB
Quad, XIP for AXI

Legacy Peripherals
DMA Controllers
8237, 82380
16450S, 16550S, 16750S

Quickly complete the standard parts of your SoC with these memory and peripheral controllers, interfaces, and interconnect cores.

Octal/Quad/Dual/Single SPI
Quad SPI
Single SPI
SPI to AHB-Lite

Master/Slave Controller
Master/Slave VIP
Master  • Slave

Data Link Controllers
16450S, 16550S, 16750S

PCI — Target
32-bit, 32-bit multi, 64-bit
PCI — Master
32-bit, 32-bit multi, 64-bit
PCI — Host Bridge
32 bit, 32 bit - AHB
32 bit & device - AHB

These encryption cores make it easy to build security into a variety of systems.

AES, programmable
Key Expander

DES single
DES triple

Hash Functions
SHA-3 (Keccak)

by CAST, Inc.

Related Links

Recent news summary page

Download this release (PDF).

Visit Product Datasheet page:

  • T8051XC3 Ultra-Small 8051-Compatible Microcontroller IP Core

Read about:

News CAST 8051 IP Line Expands with IAR Systems Tool Support and New Tiny 8-bit MCU

Woodcliff Lake, NJ, January 21 2015

Designers of embedded control systems, Internet of Things (IoT) sensor modules, and other systems requiring small, low-power, low-cost, easy-to-program microcontrollers have new options in the 8051 IP core line from intellectual property provider CAST, Inc.

  • The new T8051XC3 Tiny 8051 IP Core is among the very smallest such microcontrollers available—reducing power consumption and chip cost—yet offers both good performance and high-quality integrated peripherals.
  • The 8051 cores from CAST are now supported by the popular tools from IAR Systems®, offering designers another integrated development environment (IDE) choice.

The new Tiny 8051 core is available now, and IAR Systems tool support for it is coming soon. Support for the rest of CAST’s 8051 line is available immediately in the complete compiler and debugger toolchain IAR Embedded Workbench® from IAR Systems.

The Best Tiny 8051

T8051XC3 Block Diagram with Peripherals

Block diagram showing the T8051XC3 IP Core CPU, peripherals, and on-chip debug (OCDS).

The T8051XC3 IP Core is sourced from long-time 8051 experts Silesia Devices. It integrates an 8-bit, MCS®51-compatible processor with several common peripherals: a serial communications controller, flexible timer/counter, multipurpose IO port, and an interrupt controller. It may also include a hardware debug unit supporting JTAG four-wire or a Single-Wire interface. Inexpensive debug pods and complete reference design boards are available.

“Efficiency, performance, familiarity, low cost, and miniscule silicon usage make this Tiny 8051 controller a smart choice for any system with modest computing and memory requirements but tight power, price, and time to market constraints,” said Nikos Zervas, chief operating officer for CAST. “The T8051XC3 is the ideal controller for many MEMS, sensor, RF, and other subsystems in interconnected, wearable, or IoT applications.”

Compared with other small 8051s on the market, the T8051XC3 uses about the same silicon area and provides similar peripherals, but offers 60% better performance and double the development system options.

The MCU with all peripherals uses just 6.6K gates (180nm process) and with IAR Embedded Workbench for 8051 delivers 0.1236 DMIPS/MHz for 13.15 times the speed of the original C8051. It can run at 450MHz or better (90nm technology), offering an effective 300 times speed up over the early Intel chip.

Rapid Development with tools from IAR Systems

Screenshot of IAR Embedded Workbench for 8051 in use with 8051 cores available from CAST.

Screenshot of IAR Embedded Workbench for 8051 in use with 8051 cores available from CAST.

Developers working with the 8051s available from CAST can now use either the ARM® Keil® µVision® C51 or IAR Embedded Workbench® for 8051. The Keil tools have a long record of support for these 8051s, while the new 8051 support by IAR Systems provides a popular alternative.

 “Adding IAR Systems tool support gives developers two solid IDE choices for rapidly programming and debugging our 8051s,” said Maciej Pyka, president of Silesia Devices. “The simplicity and long history of 8051 coding coupled with these great IDEs mean designers can now deliver effective 8051-based subsystems quicker—and cheaper—than possible for perhaps any other microcontroller.”

Learn More

Visit to learn more about Silesia Devices, the MCU design experts from whom CAST sources the T8051XC3. Click to learn about IAR Embedded Workbench for 8051 or Keil µVision for 8051.

CAST is a twenty-year-old provider of IP cores and subsystems for ASICs and FPGAs, and today offers low-power, high-value IP featuring 8051s and BA2x 32-bit Processors; graphics accelerators and processing units; video, image, and data compression; security, interfaces and other functions needed for complete system on chip designs. To learn more about CAST and its product line call +1 201.391.8300, visit, or follow @castcores on Twitter.

IAR Systems and IAR Embedded Workbench are registered trademarks of IAR Systems AB. ARM, Keil, and µVision are registered trademarks of ARM Ltd. Other trademarks are the property of their respective owners.


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