MIKROE-2760

    Secure 2 click PID: MIKROE-2760       Secure 2 click carries the ATAES132A, a cryptographic coprocessor with secure hardwarebased key storage from Microchip. The click is designed to run on either 3.3V or 5V power supply. Secure 2 click communicates with the target microcontroller over SPI and I2C interface, with additional functionality provided by the INT pin on the mikroBUS™ line. The click comes with stackable headers so you can put another click on the top of it. NOTE: The click comes with stacking headers which allow you to combine it with other clicks more easily by using just one mikroBUS™ socket. ATAES132A features The ATAES132A is a high-security, Serial Electrically-Erasable and Programmable Read-Only Memory (Serial EEPROM) providing both authentication and confidential nonvolatile data storage capabilities. Access restrictions for the 16 user zones are independently configured, and any key can be used with any zone. In addition, keys can be used for standalone authentication. The AES-128 cryptographic engine operates in AES-CCM mode to provide authentication, stored data encryption/decryption, and Message Authentication Codes. Data encryption/decryption can be performed for internally stored data or for small external data packets, depending upon the configuration. Data encrypted by one ATAES132A device can be decrypted by another, and vice versa. Specifications Type  EEPROM  On‐board  modules  ATAES132A ‐ a cryptographic coprocessor with secure hardware‐based key storage from  Microchip  Key Features  Crypto element device with secure hardware‐based key storage, 512 bit OTP (One Time  Programmable) Bits for Fixed Information  Interface  I2C,SPI  Input Voltage  3.3V or 5V  Click board  size  M (42.9 x 25.4 mm)  Pinout diagram This table shows how the pinout on Secure 2 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes  Pin  Pin  Notes    NC  1  AN  PWM  16  NC      NC  2  RST  INT  15  AUTH  CS  3  CS  TX  14  NC  Auth signaling    Chip select    SPI clock  SCK  4  SCK  RX  13  NC    Slave data out for SPI  SDO  5  MISO  SCL  12  SCL  I2C clock  Slave data in for SPI  SDI  6  MOSI  SDA  11  SDA  I2C data  Power supply  +3.3V  7  3.3V  5V  10  +5V  Power supply  Ground  GND  8  GND  GND  9  GND  Ground      Programming Code examples for Secure 2 click, written for MikroElektronika hardware and compilers are available on Libstock.  Code snippet The following code snippet shows functions that will lock the configuration zone of the device and then output a generated random number. 01 //Configuration zone locking 02 if (aes132m_execute(AES132_LOCK, 0x02, 0x0000, 0x0000, 03 0, 0, 0, 0, 0, 0, 0, 0, txBuffer, rxBuffer) 04 == AES132_FUNCTION_RETCODE_SUCCESS) 05 { 06 LOG( "rnrn Configuration zone locked! " ); 07 } 08 else 09 { 10 LOG( "rnrn Configuration zone locking failed" ); 11 LOG( " or it is already locked." ); 12 } 13 memset (txBuffer, 0, 84); 14 memset (rxBuffer, 0, 36); 15 /* 16 Fourth test - Random number generator 17 Will only return 0xA5 unless config zone is locked first. 18 */ 19 if (aes132m_execute(AES132_RANDOM, 0x00, 0x0000, 0x0000, 20 0, 0, 0, 0, 0, 0, 0, 0, txBuffer, rxBuffer) 21 == AES132_FUNCTION_RETCODE_SUCCESS) 22 { 23 LOG( "rnrn Generated random number: " ); 24 outputHex (&rxBuffer[2], 16); 25 } 26 else LOG( "rnrn Random number generation failed..." ); 27 28 memset (txBuffer, 0, 84); 29 memset (rxBuffer, 0, 36);                                                            https://shop.mikroe.com/secure‐2‐click 9‐29‐17