ATSGA204A View Datasheet(PDF) - Microchip Technology
Part Name
Description
MFG CO.
'ATSGA204A' PDF : 93 Pages View PDF
ATSHA204A
Electrical Characteristics
7.3.2
Parameter
I/O Timeout
Symbol
Direction
To Crypto
Authentication
tTIMEOUT
To Crypto
Authentication
Min Typ Max Unit Notes
After the ATSHA204A
transmits the last bit of a
93
μs block, the system must wait
this interval before sending
the first bit of a flag.
The ATSHA204A may
transition to the sleep state if
45
65
85
ms
the bus is inactive longer
than this duration. See
Section I/O Timeout for
specific details.
Note:
1. tSTART, tZLO, tZHI and tBIT are designed to be compatible with a standard UART running at 230.4
kBaud for both transmit and receive. The UART should be set to seven data bits, no parity and one
stop bit.
AC Parameters — I2C Interface
Figure 7-3. I2C Synchronous Data Timing
tF
tHIGH
tR
SCL
tLOW
tLOW
tSU.STA
tHD.STA
tHD.DAT
tSU.DAT
tSU.STO
SDA IN
tAA
tDH
tBUF
SDA OUT
Table 7-4. AC Characteristics of the I2C Interface
Unless otherwise specified, applicable over recommended operating range from TA = −40°C to + 85°C,
VCC = +2.0V to +5.5V, CL = 1 TTL gate and 100 pF.
Symbol Parameter
Min Max Units
fSCK
SCK Clock Frequency
SCK Clock Duty Cycle
1000 kHz
30 70
%
tHIGH
tLOW
tSU.STA
tHD.STA
tSU.STO
SCK High Time
SCK Low Time
Start Setup Time
Start Hold Time
Stop Setup Time
400
ns
400
ns
250
ns
250
ns
250
ns
© 2018 Microchip Technology Inc.
DS40002025A-page 38
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