AT88SA100S-TH-T Atmel, AT88SA100S-TH-T Datasheet - Page 5

• Manufacturer Part Number: AT88SA100S-TH-T
• Description: IC BATTERY AUTHENTICATION 8TSSOP
• Manufacturer: Atmel
• Series: CryptoAuthentication™r

Specifications of AT88SA100S-TH-T

• Function: Battery Authentication
• Voltage - Supply: 2.7 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP (0.173", 4.40mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1.5.
2.
2.1.
8558E–SMEM–8/10
Security Features
The Atmel
unauthorized release. These include an active shield over the entire surface of the internal memory encryption,
internal clock generation, glitch protection, voltage tamper detection and other physical design features.
Both the clock and logic supply voltage are internally generated, preventing any direct attack via the pins on these
two signals.
IO Protocol
Communications to and from the AT88SA100S take place over a single asynchronously timed wire using a pulse
count scheme. The overall communications structure is a hierarchy:
Table 2-1.
IO Tokens
There are a number of IO tokens
The waveforms are the same in either direction, however there are some differences in timing based on the
expectation that the host has a very accurate and consistent clock while the AT88SA100S has significant
variation in its internal clock generator due to normal manufacturing and environmental fluctuations.
The bit timings are designed to permit a standard UART running at 230.4K baud to transmit and receive the
tokens efficiently. Each byte transmitted or received by the UART corresponds to a single bit received or
transmitted by the AT88SA100S. Refer to Applications Notes on Atmel’s website for more details describing how
the UART should be controlled.
Tokens
Flags
Blocks
Packets
Input: (To AT88SA100S)
Output: (From AT88SA100S)
Wake
Zero
One
ZeroOut Send a single bit from the AT88SA100S to the system with a value of zero
OneOut Send a single bit from the AT88SA100S to the system with a value of one
®
AT88SA100S incorporates a number of physical security features designed to protect the key from
Implement a single data bit transmitted on the bus, or the wake-up event
Comprised of eight tokens (bits) which convey the direction and meaning of the next group of bits (if any) which
may be transmitted
of data follow the command and Transmit flags. They incorporate both a byte count and a checksum to ensure
proper data transmission
of bytes form the core of the block without the count and CRC. They are either the input or output parameters of
an Atmel AT88SA100S chip command or status information from the Atmel AT88SA100S chip
IO Hierarchy
Wake AT88SA100S up from sleep (low power) state
Send a single bit from system to the AT88SA100S with a value of zero
Send a single bit from system to the AT88SA100S with a value of one
that may be transmitted along the bus:
Atmel AT88SA100S
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