AT88SC1616C-SH ATMEL [ATMEL Corporation], AT88SC1616C-SH Datasheet - Page 10

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

8.
9.
9.1
Security Fuses
There are three fuses on the device that must be blown during the device personalization process. Each fuse locks certain
portions of the configuration memory as OTP memory. Fuses are designed for the module manufacturer, card manufacturer
and card issuer and should be blown in sequence, although all programming of the device and blowing of the fuses may be
performed at one final step.
Protocol Selection
The AT88SC1616C supports two different communication protocols.
The power-up sequence determines which of the two communication protocols will be used.
Asynchronous T = 0 Protocol
This power-up sequence complies with ISO 7816-3 for a cold reset in smart card applications.
The device will respond with a 64-bit ATR code, including historical bytes to indicate the memory density within the
CryptoMemory family. Once the asynchronous mode has been selected, it is not possible to switch to the synchronous mode
without powering off the device.
Figure 9-1. Asynchronous T = 0 Protocol (Gemplus Patent)
CLK-SCL
I/O-SDA
•
•
•
•
•
•
RST
Smart Card Applications:
Embedded Applications:
V
Set I/O-SDA in receive mode
Provide a clock signal to CLK-SCL
RST goes high after 400 clock cycles
The asynchronous T = 0 protocol defined by ISO 7816-3 is used for compatibility with the industry’s standard smart
card readers
A two-wire serial interface is used for fast and efficient communication with logic or controllers
V cc
CC
goes high; RST, I/O-SDA and CLK-SCL are low
Atmel AT88SC1616C [SUMMARY DATASHEET]
ATR
2030LS−CRYPTO−12/11
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