MB95120MB Series
(8) I2C Timing
(VCC = 5.0 V 10%, AVSS = VSS = 0.0 V, TA = − 40 °C to + 105 °C)
Value
Condition Standard-mode
Pin
name
Parameter
Symbol
Fast-mode
Unit
Min
Max
Min
Max
SCL clock frequency
fSCL
SCL0
0
100
0
400
kHz
(Repeat) Start condition hold time
SDA ↓ → SCL ↓
SCL0
SDA0
tHD;STA
4.0
⎯
0.6
⎯
μs
SCL clock “L” width
SCL clock “H” width
tLOW
tHIGH
SCL0
SCL0
4.7
4.0
⎯
⎯
1.3
0.6
⎯
⎯
μs
μs
(Repeat) Start condition setup time
SCL ↑ → SDA ↓
SCL0
SDA0
tSU;STA
tHD;DAT
4.7
0
⎯
3.45*2
⎯
0.6
0
⎯
0.9*3
⎯
μs
μs
μs
μs
μs
R = 1.7 kΩ,
C = 50 pF*1
SCL0
SDA0
Data hold time SCL ↓ → SDA ↓ ↑
SCL0
SDA0
Data setup time SDA ↓ ↑ → SCL ↑ tSU;DAT
0.25*4
4.0
0.1*4
0.6
1.3
Stop condition setup time SCL ↑ →
SDA ↑
SCL0
SDA0
tSU;STO
⎯
⎯
Bus free time between stop
tBUF
SCL0
SDA0
4.7
⎯
⎯
condition and start condition
*1 : R, C : Pull-up resistor and load capacitor of the SCL and SDA lines.
*2 : The maximum tHD;DAT have only to be met if the device dose not stretch the “L” width (tLOW) of the SCL signal.
*3 : A fast-mode I2C-bus device can be used in a standard-mode I2C-bus system, but the requirement
tSU;DAT ≥ 250 ns must then be met.
*4 : Refer to “ • Note of SDA and SCL set-up time”.
• Note of SDA and SCL set-up time
SDA0
Input data set-up time
SCL0
6 tcp
Note : The rating of the input data set-up time in the device connected to the bus cannot be satisfied depending on
the load capacitance or pull-up resistor.
Be sure to adjust the pull-up resistor of SDA and SCL if the rating of the input data set-up time cannot be
satisfied.
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FUJITSU [ FUJITSU ]
