EFM32G200F64 Energy Micro, EFM32G200F64 Datasheet - Page 380

• Manufacturer Part Number: EFM32G200F64
• Description: MCU 32BIT 64KB FLASH 32-QFN
• Manufacturer: Energy Micro
• Series: Geckor

Specifications of EFM32G200F64

• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 32MHz
• Connectivity: EBI/EMI, I²C, IrDA, SmartCard, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.8 V
• Data Converters: A/D 4x12b, D/A 1x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-VQFN Exposed Pad
• Processor Series: EFM32G200
• Core: ARM Cortex-M3
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: I2C, UART
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 2
• Operating Supply Voltage: 1.8 V to 3.8 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

...the world's most energy friendly microcontrollers
• KEYWR: Cleared on a AES_KEYHn write or AES_CTRL write
27.3.5 Block Chaining Example
Example 27.1 (p. 380) below illustrates how the AES module could be configured to perform Cipher
Block Chaining with 128-bit keys.
Example 27.1. AES Cipher Block Chaining
1. Configure module to encryption, key buffer enabled and XORSTART in AES_CTRL
2. Write 128-bit initialization vector to AES_DATA, starting with least significant word.
3. Write PlainKey to AES_KEYHn, starting with least significant word.
4. Write PlainText to AES_XORDATA, starting with least significant word. Encryption will be started
when the DATA3 is written. KEYH (PlainKey) will be copied to KEYL before encryption starts.
5. When encryption finished, read CipherText from AES_DATA, starting with least significant word.
6. Loop to step 4, if new PlainText is available.
www.energymicro.com
2010-09-06 - d0001_Rev1.00
380