AT88SC0404CA-TU Atmel, AT88SC0404CA-TU Datasheet - Page 16

• Manufacturer Part Number: AT88SC0404CA-TU
• Manufacturer: Atmel

Specifications of AT88SC0404CA-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

Figure 13-1. Synchronous 2-Wire Protocol
Note:
14. Asynchronous T = 0 Protocol
Figure 14-1. Asynchronous T = 0 Protocol (Gemplus Patent)
16
Five clock pulses must be sent before the first command is issued.
AT88SC0404CA [Preliminary]
CLK-SCL
CLK-SCL
I/O-SDA
I/O-SDA
RST
V cc
RST
V cc
This power-up sequence complies to 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 asynchronous mode has been selected, it is not possible to switch to synchronous mode
without first powering off the device.
– VCC goes high; RST, I/O (SDA) and CLK (SCL) are low.
– Set I/O (SDA) in receive mode.
– Provide a clock signal to CLK (SCL).
– RST goes high after 400 clock cycles.
1
2
3
4
5
ATR
5203AS–CRYPT–6/08