SAM3SD8C Atmel Corporation, SAM3SD8C Datasheet - Page 1117

• Manufacturer Part Number: SAM3SD8C
• Manufacturer: Atmel Corporation

40.11.8
Table 30 describes the requirements for devices connected to the Two-wire Serial Bus. For timing symbols refer to
40-34.
Table 40-53. Two-wire Serial Bus Requirements
Notes:
11090A–ATARM–10-Feb-12
11090A–ATARM–10-Feb-12
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
IL
IH
HYS
OL
i
(1)
1. Required only for f
2. C
3. The TWCK low Period is defined as follows:
4. The TWCK high period is defined as follows:
5. t
Two-wire Serial Interface Characteristics
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
CPMCK
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 40-34
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
b
Max = 400pF
×
< 400 pF
×
2
CKDIV
2
CKDIV
)
+
)
4 )
+
4 )
×
20 + 0.1C
20 + 0.1C
V
------------------------------------- -
×
T
V
------------------------------------- -
VDDIO
0.7xV
MCK
VDDIO
t
t
T
t
t
CPMCK
CPMCK
LOW -
LOW -
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
–
(5)
(5)
b
b
0,4V
(1)(2)
(1)(2)
0,4V
SAM3S8/SD8
SAM3S8/SD8
3 x t
3 xt
0.3 V
V
1000ns
------------------ -
CC
300ns
--------------- -
Max
CPMCK
300
250
400
CPMCK
0.4
10
C
C
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
+ 0.3
VDDIO
b
b
(5)
(5)
Units
kHz
ns
ns
pF
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
ns
ns
µs
µs
µs
µs
Figure
V
V
V
V
Ω
Ω
1117
1117