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CCMZ1/CCMZ2 IEEE 802.15.4 (ZigBee™) CCM* AES Cores

General Description

IEEE 802.15.4 is the low-power wireless standard that is used by ZigBee Alliance as a base of its ZigBee™ specification. The security design of IEEE 802.15.4 uses the CCM* mode of the AES cipher for encryption and message authentication. The CCMZ cores are tuned for low-power IEEE 802.15.4 applications.
CCMZ1 core is slightly larger and uses flow-trough design with key and nonce in the data stream; CCMZ2 core has dedicated inputs for key and nonce.
Cores contain the base AES core AES1 and are available for immediate licensing.
The design is fully synchronous and available in both source and netlist form.

Key Features

Small size: Completely self-contained: does not require external memory
Supports encryption and decryption,
Includes key expansion (scheduling)
Support for CCM* mode of the AES cipher
Flow-through design with frame header parsing
Test bench provided
IEEE 802.15.4 (ZigBee)
Pin Description
CLK Input   Core clock signal
RESET Input   Synchronous enable signal. When LOW the core ignores all   its inputs and all its outputs must be ignored.
MODE Input   Mode. When HIGH, transmit, when LOW receive
START Input   HIGH starting input data processing
READ Output   Read request for the input data byte
DATA_VALID Input   HIGH when valid data byte present on the input
WRITE output   Write to the output interface
OUT_READY Input   HIGH when output interface is ready to accept data byte
D[7:0] Input   Input Data
k[127:0] Input   AES key (CCMZ2 only)
N[103:0] Input   CCM* Nonce (CCMZ2 only)
Q[7:0] Output   Output Data
DONE Output   Data processing completed
Function Description
The Advanced Encryption Standard (AES) algorithm is a new NIST data encryption standard as defined in the http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf

The CCMZ implementation fully supports the AES algorithm for 128 bit keys in Counter Mode (CTR) method of encryption with CBC message integrity check of all sizes required by the CCM* protocol of the IEEE 802.15.4 standard.

The core is designed for flow-through operation, with byte-wide input and output interfaces. For CCMZ1, CCM key and nonce material precede the frame in the flow of data. Both CCMZ1 and CCMZ2 support encrypt/decrypt modes and includes on-the-fly key expansion (scheduling).

Implementation Results
Area Utilization and Performance

Representative area/resources figures are shown below.

CCMZ1 TSMC 0.18 8K gates
CCMZ2 TSMC 0.18 6K gates
Export Permits
US Bureau of Industry and Security has assigned the export control classification number 5E002 to our AES core. The core is eligible for the license exception ENC under section 740.17(A) and (B)(1) of the export administration regulations. See the licensing basics page, for links to US government sites and more details.

HDL Source Licenses

Synthesizable Verilog RTL source code
Test bench (self-checking)
vectors for testbenches
Expected results
User Documentation

Netlist Licenses

Post-synthesis EDIF
Testbench (self-checking)
vectors for testbenches
Expected results
Contact Information
IP Cores, Inc.
3731 Middlefield Rd.
Palo Alto, CA 94303, USA
Phone: +1 (650) 815-7996
E-mail: [email protected]