SAM3N0C Atmel Corporation, SAM3N0C Datasheet - Page 726

• Manufacturer Part Number: SAM3N0C
• Manufacturer: Atmel Corporation

35.8.5
Table 35-39
ure
Table 35-39. Two-wire Serial Bus Requirements
Note:
726
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)
35-19.
1. Required only for f
2. C
3.
4.
5. T
SAM3N
Two-wire Serial Interface Characteristics
The TWCK low Period is defined as follows:
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
describes the requirements for devices connected to the Two-wire Serial Bus. For timing symbols refer to
b
= capacitance of one bus line in pF. Per I2C Standard, C
= MCK Bus Period.
TWCK
> 100 kHz.
IHmin
to V
ILmax
T
T
low
high
=
10 pF < C
=
(
3 mA sink current
f
f
f
f
f
f
f
f
f
(
f
f
f
f
f
f
f
f
f
(
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
CLDIV
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
TWCK
(
Figure 35-19
CHDIV
Condition
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
b
Max = 400pF
b
×
< 400 pF
×
2
CKDIV
2
CKDIV
)
+
)
4 )
+
4 )
×
20 + 0.1C
20 + 0.1C
V
------------------------------------- -
×
T
V
------------------------------------- -
VDDIO
0.7xV
T
T
MCK
VDDIO
t
t
T
LOW -
LOW -
CP_MCK
CP_MCK
MCK
0.150
3mA
t
t
t
t
t
t
t
t
Min
-0.3
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
3mA
(3)
(3)
(4)
(4)
–
0
0
0
-
VDDIO
–
3 x
3 x
–
b
b
0,4V
(5)
(5)
(1)(2)
(1)(2)
0,4V
3 x T
3 x T
0.3 V
V
1000ns
------------------ -
CC
300ns
--------------- -
Max
300
250
400
CP_MCK
CP_MCK
0.4
C
10
11011A–ATARM–04-Oct-10
C
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
+ 0.3
VDDIO
b
b
(5)
(5)
Units
kHz
pF
ns
ns
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
ns
ns
µs
µs
µs
µs
Ω
Ω
V
V
V
V
Fig-