AT88SA10HS-SH-T 데이터 시트보기 (PDF) - Atmel Corporation

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AT88SA10HS-SH-T

Atmel CryptoAuthentication Host Security Chip

Atmel Corporation 

2.1 IO Tokens

There are a number of IO tokens that may be transmitted along the bus:

Input: (To AT88SA10HS)

Wake Wake the AT88SA10HS up from sleep (low power) state

Zero

Send a single bit from system to the AT88SA10HS with a value of zero

One Send a single bit from system to the AT88SA10HS with a value of one

Output: (From AT88SA10HS)

ZeroOut Send a single bit from the AT88SA10HS to the system with a value of zero

OneOut Send a single bit from the AT88SA10HS to the system with a value of one

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 AT88SA10HS 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 230.4 K 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 AT88SA10HS. See

applications notes on the Atmel website for more details.

2.2 AC Parameters

WAKE

data comm

tWLO

tWHI

LOGIC Ø

LOGIC 1

NOISE

SUPPRESION

tSTART

tZHI

tZLO

tBIT

tSTART

tLIGNORE

tHIGNORE

Atmel AT88SA10HS [DATASHEET]

5

8595G−CRYPTO−9/11

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