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]
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