ATSHA204 ATMEL [ATMEL Corporation], ATSHA204 Datasheet - Page 29

• Manufacturer Part Number: ATSHA204
• Description: Atmel CryptoAuthentication
• Manufacturer: ATMEL [ATMEL Corporation]

7.3.2
AC Parameters – I
Figure 7-3. I
SDA OUT
Table 7-4.
Applicable over recommended operating range from T
(unless otherwise noted)
Notes:
Symbol
f
t
t
t
t
t
t
t
t
t
t
t
t
SCK
HIGH
LOW
SU.STA
HD.STA
SU.STO
SU.DAT
HD.DAT
R
F
AA
DH
BUF
SDA IN
SCL
1.
2. AC measurement conditions:
AC Characteristics of I
Values are based on characterization, but are not tested.
2
C Synchronous Data Timing



Parameter
SCK Clock Frequency
SCK Clock Duty Cycle
SCK High Time
SCK Low Time
Start Setup Time
Start Hold Time
Stop Setup Time
Data in Setup Time
Data in Hold Time
Input rise time
Input Fall Time
Clock Low to Data Out Valid
Data Out Hold Time
Time bus must be free before a new transmission can start.
RL (connects between SDA and V
Input pulse voltages: 0.3V
Input rise and fall times: ≤ 50ns
Input and output timing reference voltage: 0.5V
2
C Interface
t
SU.STA
(1)
(1)
2
C Interface
t
HD.STA
t
t
F
LOW
CC
to 0.7V
t
AA
A
CC
= −40°C to + 85°C, V
CC
): 2.0kΩ (for V
t
HIGH
t
HD.DAT
CC
CC
t
LOW
+2.0V to +5.0V)
CC
(1)
= +2.0V to +5.5V, CL = 1 TTL gate and 100pF
Atmel ATSHA204 [DATASHEET]
t
t
SU.DAT
DH
400
400
250
250
250
100
500
Min
30
50
50
0
0
Max
300
100
550
8740D−CRYPTO−3/12
70
1
t
R
t
percent
SU.STO
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t
BUF
29