SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 1440

• Manufacturer Part Number: SAM3X8E
• Manufacturer: Atmel Corporation

45.10.9
Table 30 describes the requirements for devices connected to the Two-wire Serial Bus. For timing symbols refer to
45-36.
Table 45-58. Two-wire Serial Bus Requirements
Note:
1440
Symbol
V
V
V
V
t
t
C
f
Rp
t
t
t
t
t
t
t
t
r
of
TWCK
LOW
HIGH
HD;STA
SU;STA
HD;DAT
SU;DAT
SU;STO
HD;STA
OL
IL
IH
hys
i
(1)
1. Required only for f
2. C
3.
4.
5. T
SAM3X/A
Two-wire Serial Interface Characteristics
The TWCK low Period is defined as follow:
The TWCK high period is defined as follows:
Parameter
Input Low-voltage
Input High-voltage
Hysteresis of Schmitt Trigger Inputs
Output Low-voltage
Rise Time for both TWD and TWCK
Output Fall Time from V
Capacitance for each I/O Pin
TWCK Clock Frequency
Value of Pull-up resistor
Low Period of the TWCK clock
High period of the TWCK clock
Hold Time (repeated) START Condition
Set-up time for a repeated START condition
Data hold time
Data setup time
Setup time for STOP condition
Hold Time (repeated) START Condition
CP_MCK
b
= capacitance of one bus line in pF. Per I2C Standard compatibility, C
= MCK Bus Period.
TWCK
> 100 kHz.
IHmin
to V
ILmax
T
low
T
high
=
=
CLDIV
10 pF < C
3 mA sink current
f
f
f
f
f
f
f
f
f
CHDIV
f
f
f
f
f
f
f
f
f
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
Figure 45-36
Condition
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
2
100 kHz
100 kHz
100 kHz
100 kHz
100 kHz
100 kHz
100 kHz
100 kHz
100 kHz
b
CKDIV
< 400 pF
2
CKDIV
+
b
4
Max = 400 pF
+
4
T
MCK
T
20 + 0.1C
20 + 0.1C
V
------------------------------------- -
MCK
V
------------------------------------- -
VDDIO
0.7xV
VDDIO
t
t
T
T
LOW -
LOW -
0.150
CP_MCK
CP_MCK
3mA
t
t
t
t
t
t
t
t
-0.3
Min
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
(3)
(3)
(4)
(4)
3mA
–
0
0
0
-
VDDIO
–
3 x
3 x
–
b
b
0,4V
(1)(2)
(1)(2)
0,4V
3 x T
3 x T
11057A–ATARM–17-Feb-12
0.3 V
V
1000ns
------------------ -
CC
300ns
--------------- -
Max
300
250
400
0.4
C
10
C
CP_MCK
CP_MCK
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
+ 0.3
VDDIO
b
b
Figure
Units
kHz
pF
ns
ns
μs
μs
μs
μs
μs
μs
μs
μs
μs
μs
ns
ns
μs
μs
μs
μs
V
V
V
V