AT88SA10HS-TSU-T Atmel, AT88SA10HS-TSU-T Datasheet - Page 8

• 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.
3.1.1. Command Timing
8
IO Flags
The system is always the bus master, so before any IO transaction, the system must send an 8 bit flag to the chip to
indicate the IO operation that is to be performed, as follows:
All other values are reserved and will be ignored. Note that the values of flag for the AT88SA10HSS host are different
from that of the two clients, the AT88SA100S and AT88SA102S. In this manner, both the AT88SA102S (or
AT88SA100S) and AT88SA10HSS can share the same communications pin on the system controller. While the
AT88SA10HS will wake up when communications are sent to the client, it will ignore all such transactions.
It is possible that data values transmitted to a client authentication chip (either theAT88SS100S or the AT88SA102S)
could be interpreted by the AT88SA10HS host chip as a legal transmit flag. In this case there could be a bus conflict as
both the host and client chips drive the signal wire at the same time. To prevent this, the PauseShort command should
be used to prevent the AT88SA10HS host chip from looking at the signal wire during any IO transaction to the client.
After a command flag is transmitted, a command block should be sent to the chip. During parsing of the parameters
and subsequent execution of a properly received command, the chip will be busy and not respond to transitions on the
signal pin. The delays for these operations are listed in the table below:
Table 5.
In this document, t
chip.
AT88SA10HS Host Authentication Chip [Preliminary]
Value
0x66
0x99
0xCC
Parsing Delay
HostDelay
MemoryDelay
SecureDelay
PersonalizeDelay
Parameter
Name
Command
Transmit
Sleep
Command Timing
EXEC
t
t
t
t
t
PARSE
EXEC_HOST
EXEC_READ
EXEC_SECURE
PERSON
is used as shorthand for the delay corresponding to whatever command has been sent to the
Symbol
Meaning
After this flag, the system starts sending a command block to the chip. The first bit of the
block can follow immediately after the last bit of the flag.
After a turn-around delay, the chip will start transmitting the response for a previously
transmitted command block.
Upon receipt of a sleep flag, the chip will enter a low power mode until the next wake token
is received.
Min Max
15
50
13
0
7
100
50
30
26
15
Unit
ms
ms
ms
μs
μs
Delay to execute Read command
Delay to check CRC and parse opcode and parameters
before an error indication will be available
Delay to execute any of the 4 HOST commands
Max delay to execute BurnSecure command at Vcc > 4.5V.
See Section 4.6 for more details.
Delay to execute GenPersonalizationKey
Notes
8595B–SMEM–09/09