AT88SC0204CA-TU Atmel, AT88SC0204CA-TU Datasheet - Page 25
AT88SC0204CA-TU
Manufacturer Part Number
AT88SC0204CA-TU
Description
Manufacturer
Atmel
Datasheet
1.AT88SC0204CA-TU.pdf
(66 pages)
Specifications of AT88SC0204CA-TU
Operating Temperature (max)
85C
Operating Temperature (min)
-40C
Mounting
Surface Mount
Pin Count
8
Operating Temperature Classification
Industrial
Lead Free Status / RoHS Status
Compliant
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7.
7.1.
24
Protocol Selection
Atmel
communication for embedded applications and an ISO 7816 asynchronous T=0 smart card interface. The power-up
sequence of CryptoMemory determines what mode it shall operate in. A brief description of each of these modes
follows.
Synchronous Mode for Embedded Applications
The 2-wire serial interface is used for fast and efficient communication with logic and controllers. The synchronous
mode is the default after powering up V
applications using CryptoMemory in standard plastic packages RST is not bonded out and this is the only
communication protocol.
• Power-up V
• After stable V
• CLK-SCL and I/O-SDA may then be driven.
Figure 9. Asynchronous Mode
CLK-SCL
The asynchronous mode is selected when RST is low on a rising edge of CLK. Once the asynchronous mode has been
selected, it is not possible to return to the synchronous mode other than by powering the device off and on again.
Atmel AT88SC0104/0204/0404/0808/CA
I/O-SDA
RST
®
V cc
CryptoMemory
CC
CC
, RST goes high also.
, apply five pulses CLK-SCL
®
supports two application areas with different communication protocols: a 2-wire serial
1
2
3
CC
due to the internal and/or external pull-up on RST. For embedded
4
5
8664C–CRYPT–01/10
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