ATSHA204A datasheet(37/93 Pages) MICROCHIP

37 / 93 page

7.3.1

AC Parameters — Single-Wire Interface

Figure 7-2. AC Timing Diagram — Single-Wire Interface

START

ZHI

ZLO

Logic Ø

START

BIT

Logic 1

START

TURNAROUND

START

SDA

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

4.10 4.34 4.56

μs

From Crypto

Authentication

4.60 6.00 8.60

μs

Zero Transmission

High Pulse(1)

tZHI

To Crypto

Authentication

4.10 4.34 4.56

μs

From Crypto

Authentication

4.60 6.00 8.60

μs

Zero Transmission

Low Pulse(1)

tZLO

To Crypto

Authentication

4.10 4.34 4.56

μs

From Crypto

Authentication

4.60 6.00 8.60

μs

Bit Time(1)

tBIT

To Crypto

Authentication

—

μs

If the bit time exceeds

tTIMEOUT, then the

ATSHA204A may enter the

sleep state. See Section I/O

Timeout for specific details.

From Crypto

Authentication

μs

Turnaround Delay

tTURNAROUND

From Crypto

Authentication

131

μs

The ATSHA204A initiates

the first low-going transition

after this time interval

following the start of the last

bit (tBIT) of the Transmit

flag.

ATSHA204A

Electrical Characteristics

DS40002025A-page 37

ATSHA204A Datasheet(PDF) 37 Page - Microchip Technology

ATSHA204A Datasheet(HTML) 37 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93

Datasheet Download

Link URL