C8051F961-A-GM Silicon Labs, C8051F961-A-GM Datasheet - Page 190
C8051F961-A-GM
Manufacturer Part Number
C8051F961-A-GM
Description
8-bit Microcontrollers - MCU 128KB, DC-DC, LCD AES, QFN40
Manufacturer
Silicon Labs
Datasheet
1.C8051F960-A-GQ.pdf
(492 pages)
Specifications of C8051F961-A-GM
Rohs
yes
Core
8051
Processor Series
C8051
Data Bus Width
8 bit
Maximum Clock Frequency
25 MHz
Program Memory Size
128 KB
Data Ram Size
8448 B
On-chip Adc
Yes
Operating Supply Voltage
2.5 V to 3.3 V
Operating Temperature Range
- 40 C to + 85 C
Package / Case
QFN-40
Mounting Style
SMD/SMT
Number Of Programmable I/os
34
Number Of Timers
4
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C8051F96x
14.6. Block Cipher Modes
14.6.1. Cipher Block Chaining Mode
The Cipher Block Chaining (CBC) Mode algorithm significantly improves the strength of basic AES encryp-
tion by making each block encryption be a function of the previous block in addition to the current Plaintext
and key. This algorithm is shown inFigure 14.4
190
Encryption
Decryption
Initialization Vector (IV)
Initialization Vector (IV)
Encryption
Decryption
Figure 14.4. Cipher Block Chaining Mode
Key
Key
Cipher Text
Cipher Text
Plain Text
Encryption
Decryption
Plain Text
Cipher
Cipher
XOR
XOR
Rev. 0.5
Encryption
Decryption
Key
Key
Cipher Text
Encryption
Cipher Text
Decryption
Plain Text
Plain Text
Cipher
Cipher
XOR
XOR
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