MB90350E Datasheet, PDF (72/85 Pages) Fujitsu Component Limited. – 16-bit Proprietary Microcontrollers

MB90350E Series
(13) I²C Timing
(TA = −40 °C to +125 °C, VCC = AVCC = 5.0 V ± 10%, fCP ≤ 24 MHz, VSS = AVSS = 0 V)
Parameter
Symbol
Condition
Standard-mode Fast-mode*⁴
Unit
Min Max Min Max
SCL clock frequency
fSCL
0
100
0 400 kHz
Hold time for (repeated) START condition
SDA ↓ → SCL ↓
tHDSTA
4.0
⎯
0.6
⎯ µs
“L” width of the SCL clock
tLOW
4.7
⎯
1.3
⎯ µs
“H” width of the SCL clock
tHIGH
4.0
⎯
0.6
⎯ µs
Set-up time for a repeated START condition
SCL ↑ → SDA ↓
Data hold time
SCL ↓ → SDA ↓ ↑
tSUSTA
tHDDAT
R = 1.7 kΩ,
C = 50 pF*¹
4.7
⎯
0.6
⎯ µs
0
3.45*²
0
0.9*³ µs
Data set-up time
SDA ↓ ↑ → SCL ↑
tSUDAT
250*⁵ ⎯ 100*⁵ ⎯ ns
Set-up time for STOP condition
SCL ↑ → SDA ↑
tSUSTO
4.0
⎯
0.6
⎯ µs
Bus free time between STOP condition and
START condition
tBUS
4.7
⎯
1.3
⎯ µs
*1 : R,C : Pull-up resistor and load capacitor of the SCL and SDA lines.
*2 : The maximum tHDDAT has to meet at least that the device does not exceed 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
tSUDAT ≥ 250 ns must be met.
*4 : For use at over 100 kHz, set the machine clock to at least 6 MHz.
*5 : Refer to “• Note of SDA, SCL set-up time”.
• Note of SDA, SCL set-up time
SDA
Input data set-up time
SCL
6 tCP
72