AT88SA10HS-TSU-T Atmel, AT88SA10HS-TSU-T Datasheet - Page 9

• Manufacturer Part Number: AT88SA10HS-TSU-T
• Description: IC HOST AUTHENTICATION SOT23-3
• Manufacturer: Atmel
• Series: CryptoAuthentication™r
• Type: Authentication Chipr

Specifications of AT88SA10HS-TSU-T

• Applications: Networking & Communications
• Mounting Type: Surface Mount
• Package / Case: SOT-23-3
• Operating Supply Voltage: 2.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Interface Type: 1 Wire
• Minimum Operating Temperature: - 40 C
• Number Of Timers: 1
• Program Memory Size: 72 bit
• Program Memory Type: ROM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.1.2. Transmit Flag
3.1.3. Sleep Flag
8595B–SMEM–09/09
The transmit flag is used to turn around the signal so that the AT88SA10HS can send data back to the system,
depending on its current state. The bytes that the AT88SA10HS returns to the system depend on its current state as
follows:
Table 6.
The AT88SA10HS always transmits complete blocks to the system, so in the above table, the status/error bytes result
in 4 bytes going to the system – count, error, CRC x 2.
After receipt of a command block, the AT88SA10HS will parse the command for errors, a process which takes t
(Refer to 3.1.1). After this interval the system can send a transmit token to the AT88SA10HS – if there was an error,
the AT88SA10HS will respond with an error code. If there is no error, the AT88SA10HS internally transitions
automatically from t
The sleep flag is used to transition the AT88SA10HS to the low power state, which causes a complete reset of the
AT88SA10HS’s internal command engine and input/output buffer. It can be sent to the AT88SA10HS at any time when
the AT88SA10HS will accept a flag.
To achieve the specified I
To achieve I
to avoid additional leakage on the input circuit of the chip.
The system must calculate the total time required for all commands to be sent to the AT88SA10HS during a single
session, including any inter-bit/byte delays. If this total time exceeds t
set of commands, then a Sleep flag, then a Wake token, and finally after the wake delay, issue the remaining
commands.
After wake, but prior to first
command
After successful command
execution
Execution error
After CRC or other
communications error
State Description
SLEEP
Return Codes
AT88SA10HS Host Authentication Chip [Preliminary]
if the sleep state of the input pin is high, the voltage on the input signal should be within 0.5V of V
PARSE
to t
SLEEP
EXEC
, Atmel recommends that the input signal be brought below V
Error/Status
and will not respond to any transmit tokens until both delays are complete.
0xFF
0x11
0x0F
–
Indication that a proper wake token has been received by the
AT88SA10HS.
Return bytes per “Output Parameters” in Command section of this
document. In some cases this is a single byte with a value of 0x00
indicating success. The transmit flag can be resent to the
AT88SA10HS repeatedly if a re-read of the output is necessary.
Command was properly received but could not be executed by the
AT88SA10HS. Changes in the AT88SA10HS state or the value of the
command bits must happen before it is re-attempted.
Command was NOT properly received by the AT88SA10HS and
should be re-issued by the system. No attempt was made to execute
the command.
WATCHDOG
Description
then the system must issue a partial
IL
when the chip is asleep.
PARSE
CC
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