ATXMEGA128B3-AU ATMEL [ATMEL Corporation], ATXMEGA128B3-AU Datasheet - Page 87

• Manufacturer Part Number: ATXMEGA128B3-AU
• Description: 8/16-bit Atmel XMEGA B3 Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

36.16 Two-Wire Interface Characteristics
Table 36-30. Two Wire Serial Bus Characteristics
8074B–AVR–02/12
Symbol
V
V
V
V
t
t
t
I
C
f
R
t
t
t
t
r
of
SP
I
SCL
HD;STA
LOW
HIGH
SU;STA
IH
IL
hys
OL
I
P
Parameter
Input High Voltage
Input Low Voltage
Hysteresis of Schmitt Trigger Inputs
Output Low Voltage
Rise Time for both SDA and SCL
Output Fall Time from V
Spikes Suppressed by Input Filter
Input Current for each I/O Pin
Capacitance for each I/O Pin
SCL Clock Frequency
Value of Pull-up resistor
Hold Time (repeated) START condition
Low Period of SCL Clock
High Period of SCL Clock
Set-up time for a repeated START condition
Table 2-1 describes the requirements for devices connected to the Two Wire Serial Bus. The
XMEGA Two-Wire Interface meets or exceeds these requirements under the noted conditions.
Timing symbols refer to
Figure 36-7. Two-Wire Interface Bus Timing
SDA
SCL
IHmin
t
SU;STA
to V
ILmax
t
HD;STA
t
of
Figure
3mA, sink current
0.1V
10pF < C
f
f
f
f
f
f
f
f
f
f
f
PER
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
(3)
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
CC
36-7.
>max(10f
< V
Condition
b
< 400pF
I
< 0.9V
t
HIGH
t
HD;DAT
SCL
, 250kHz)
CC
(2)
t
LOW
20+0.1C
20+0.1C
V
----------------------------
0.05V
t
CC
0.7*V
SU;DAT
3mA
Min
-0.5
-10
4.0
0.6
4.7
1.3
4.0
0.6
4.7
0.6
–
0
0
0
0.4V
CC
CC
b
b
(1)(2)
(1)(2)
(1)
100ns
--------------- -
t
Typ
r
C
b
XMEGA B3
V
0.3*V
CC
300ns
--------------- -
Max
300
250
400
t
0.4
50
10
10
SU;STO
C
0
+0.5
t
BUF
b
CC
Units
kHz
µA
pF
ns
µs
Ω
V
87