AT88SC0204CA-TU Atmel, AT88SC0204CA-TU Datasheet - Page 26

• Manufacturer Part Number: AT88SC0204CA-TU
• Manufacturer: Atmel

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

7.2.
8664C–CRYPT–01/10
Asynchronous Mode for Smart Card Applications
The asynchronous T=0 protocol defined by ISO 7816-3 is used for compatibility with the industry standard smart card
readers. Selecting this mode requires the following power-up sequence, which complies with ISO 7816-3 for a cold
reset in smart card applications.
• Power up V
• Set I/O-SDA in receive mode
• Provide a clock signal to CLK-SCL
• RST goes high after 400 clock cycles
The device will respond with a 64-bit ATR code, including historical bytes to indicate the memory density within the
Atmel
synchronous mode without powering off the device.
Table 16. ATR Codes for Lower Density Atmel CryptoMemory
Figure 10. Power Up Sequence for Smart Card Mode
Note:
CLK-SCL
I/O-SDA
Atmel AT88SC0104CA
Atmel AT88SC0204CA
Atmel AT88SC0404CA
Atmel AT88SC0808CA
®
RST
V cc
CryptoMemory
Smart card applications that support the 2-Wire protocol can also use Atmel CryptoMemory in the
synchronous mode
Device
CC
; RST, IO-SDA and CLK-SCL are low
®
family. Once the asynchronous mode has been selected, it is not possible to switch to the
$3B
$3B
$3B
$3B
TS
$B2
$B2
$B2
$B2
T0
Atmel AT88SC0104/0204/0404/0808/CA
TA(1)
$11
$11
$11
$11
TB(1)
$00
$00
$00
$00
ATR
TD(1)
$10
$10
$10
$10
TA(2)
$80
$80
$80
$80
$00
$00
$00
$00
T1
$01
$02
$04
$08
T2
25