ENC624J600-I/PT Microchip Technology, ENC624J600-I/PT Datasheet - Page 137

• Manufacturer Part Number: ENC624J600-I/PT
• Description: IC ETHERNET CTRLR W/SPI 64-TQFP
• Manufacturer: Microchip Technology

Specifications of ENC624J600-I/PT

• Package / Case: 64-TFQFP
• Controller Type: Ethernet Controller
• Interface: SPI
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 96mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Input Voltage Range (max): 5.5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3 V to 3.6 V
• Supply Current (max): 117 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC164132 - BOARD DAUGHTER PICTAIL ETHERNET
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

To encrypt a block using CTR mode:
1.
2.
3.
4.
5.
6.
7.
8.
 2010 Microchip Technology Inc.
Load the encryption key as described in
Section 15.3.1 “Key Support” .
Set AESOP<1:0> (ECON1<10:9>) to ‘ 00 ’.
Copy the counter value to TEXTA at 7C20h.
Set AESST (ECON1<11>) to initiate the
encryption.
Copy the plaintext message to TEXTB at
7C30h.
Wait for the hardware to clear AESST.
Read the ciphertext message from XOROUT at
7C40h.
Repeat steps 3 through 7 for subsequent blocks.
ENC424J600/624J600
To decrypt a block using CTR mode:
1.
2.
3.
4.
5.
6.
7.
8.
The context for CTR mode consists of the AES encryp-
tion key and the counter value. It is up to the application
to determine what needs to be saved for the counter
value context.
Load the encryption key as described in
Section 15.3.1 “Key Support” . Note that this
mode does not make use of a decryption key.
Set AESOP<1:0> to ‘ 00 ’.
Copy the counter value to TEXTA at 7C20h.
Set AESST to initiate the encryption.
Copy the ciphertext message to TEXTB at
7C30h.
Wait for the hardware to clear AESST.
Read the plaintext message from XOROUT at
7C40h.
Repeat steps 3 through 7 for subsequent blocks.
DS39935C-page 135