AT88SC1616C-SH ATMEL [ATMEL Corporation], AT88SC1616C-SH Datasheet - Page 11

• Manufacturer Part Number: AT88SC1616C-SH
• Description: Atmel CryptoMemory, 16Kbit
• Manufacturer: ATMEL [ATMEL Corporation]

9.2
10.
Synchronous Two-wire Serial Interface
The synchronous mode is the default after powering up V
using CryptoMemory in standard plastic packages, this is the only communication protocol.
Figure 9-2. Synchronous Two-wire Protocol
Note:
Communication Security Modes
Communications between the device and host operate in three basic modes. Standard mode is the default mode for the
device after power-up. Authentication mode is activated by a successful authentication sequence. Encryption mode is
activated by a successful encryption activation following a successful authentication.
Table 10-1. Communication Security Modes
Notes:
CLK-SCL
Mode
Standard
Authentication
Encryption
I/O-SDA
•
•
RST
V cc
Power-up V
After stable V
1.
Five clock pulses must be sent before the first command is issued
Configuration data include viewable areas of the configuration zone except the passwords:


CC
MDC: Modification Detection Code
MAC: Message Authentication Code
CC
, RST goes high also
, CLK-SCL and I/O-SDA may be driven
Configuration Data
1
clear
clear
clear
2
3
(1)
4
User Data
encrypted
clear
clear
5
CC
due to an internal pull-up on RST. For embedded applications
Atmel AT88SC1616C [SUMMARY DATASHEET]
Passwords
encrypted
encrypted
clear
Data Integrity Check
2030LS−CRYPTO−12/11
MDC
MAC
MAC
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