MCF5270CAB100 Freescale Semiconductor, MCF5270CAB100 Datasheet - Page 521

• Manufacturer Part Number: MCF5270CAB100
• Description: MCU V2 COLDFIRE 64K SRAM 160-QFP
• Manufacturer: Freescale Semiconductor
• Series: MCF527xr

Specifications of MCF5270CAB100

• Core Processor: Coldfire V2
• Core Size: 32-Bit
• Speed: 100MHz
• Connectivity: EBI/EMI, Ethernet, I²C, SPI, UART/USART
• Peripherals: DMA, WDT
• Number Of I /o: 39
• Program Memory Type: ROMless
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 160-QFP
• Processor Series: MCF527x
• Core: ColdFire V2
• 3rd Party Development Tools: JLINK-CF-BDM26, EWCF
• Development Tools By Supplier: NNDK-MOD5272-KIT, NNDK-MOD5270-KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

28.1.2.2 Advanced Encryption Standard (AES) Algorithm
In AES mode, SKHA is used to accelerate bulk data encryption/decryption in compliance with the
advanced encryption standard algorithm (AESA) Rinjdael. AES executes on 128-bit blocks with
128-bit key size.
AES is a symmetric key algorithm, the sender and receiver use the same key for both encryption
and decryption. The session key and initialization vector (CBC mode) are supplied to the SKHA
module prior to encryption. The processor supplies data to the module that is processed as 128-bit
input. The SKHA engine performs ten rounds for encryption or decryption. AES operates in ECB,
CBC, and CTR modes.
28.1.2.3 Electronic Code Book (ECB) Cipher Mode
The simplest mode is ECB. Each block is processed independently, as shown in
is no context used in this mode. Each block of plaintext is encrypted to determine the
corresponding ciphertext. In decrypt mode, the ciphertext blocks are decrypted to restore the
plaintext.
Freescale Semiconductor
block n
64-bit
128-bit
block n
Plaintext blocks
block n-1
128-bit
Figure 28-2. Triple-DES Encryption Process (ECB Mode)
Plaintext blocks
block 1
64-bit
...
block 2
128-bit
Figure 28-3. AES Encryption Process
64-bit K
MCF5271 Reference Manual, Rev. 2
DES
block 1
128-bit
1
1
128-bit key
64-bit K
DES
AES
2
2
64-bit K
DES
128-bit
block n
3
3
block n-1
Ciphertext blocks
128-bit
block n
64-bit
...
Ciphertext blocks
block 2
128-bit
Figure
block 1
128-bit
block 1
28-4. There
64-bit
Introduction
28-3