ATSGA204A View Datasheet(PDF) - Microchip Technology
Part Name
Description
MFG CO.
'ATSGA204A' PDF : 93 Pages View PDF
7.3.1
AC Parameters — Single-Wire Interface
Figure 7-2. AC Timing Diagram — Single-Wire Interface
ATSHA204A
Electrical Characteristics
Logic Ø
tSTART
tZHI
tZLO
tBIT
Logic 1
tSTART
tTURNAROUND
SDA
tSTART
tSTART
Table 7-3. AC Parameters — Single-Wire Interface
Unless otherwise specified, applicable from TA = −40°C to +85°C, VCC = +2.0V to +5.5V, CL =100 pF.
Parameter
Symbol
Direction
Min Typ Max Unit Notes
Start Pulse
Duration(1)
tSTART
To Crypto
Authentication
From Crypto
Authentication
4.10 4.34 4.56 μs
4.60 6.00 8.60 μs
Zero Transmission
High Pulse(1)
tZHI
To Crypto
Authentication
From Crypto
Authentication
4.10 4.34 4.56 μs
4.60 6.00 8.60 μs
Zero Transmission
Low Pulse(1)
tZLO
To Crypto
Authentication
From Crypto
Authentication
4.10 4.34 4.56 μs
4.60 6.00 8.60 μs
Bit Time(1)
tBIT
To Crypto
Authentication
If the bit time exceeds
tTIMEOUT, then the
37 39 — μs ATSHA204A may enter the
sleep state. See Section I/O
Timeout for specific details.
From Crypto
Authentication
41 54 78 μs
Turnaround Delay
tTURNAROUND
From Crypto
Authentication
The ATSHA204A initiates
the first low-going transition
64
80
131
μs
after this time interval
following the start of the last
bit (tBIT) of the Transmit
flag.
© 2018 Microchip Technology Inc.
DS40002025A-page 37
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