AK09918 Datasheet, PDF (7/30 Pages) Asahi Kasei Microsystems – 3-axis Electronic Compass

[AK09918]
8.4. I²C Bus Interface
I²C bus interface is compliant with Standard mode and Fast mode. Standard/Fast mode is selected
automatically by fSCL.
 Standard mode
fSCL ≤ 100kHz
Symbol
Parameter
fSCL
SCL clock frequency
tHIGH
SCL clock “High” time
tLOW
SCL clock “Low” time
tR
SDA and SCL rise time
tF
SDA and SCL fall time
tHD:STA
Start Condition hold time
tSU:STA
Start Condition setup time
tHD:DAT
SDA hold time (vs. SCL falling edge)
tSU:DAT
SDA setup time (vs. SCL rising edge)
tSU:STO
Stop Condition setup time
tBUF
Bus free time
Min. Typ. Max.
Unit
100
kHz
4.0
s
4.7
s
1.0
s
0.3
s
4.0
s
4.7
s
0
s
250
ns
4.0
s
4.7
s
 Fast mode
100kHz ≤ fSCL ≤ 400kHz
Symbol
Parameter
fSCL
SCL clock frequency
tHIGH
SCL clock “High” time
tLOW
SCL clock “Low” time
tR
SDA and SCL rise time
tF
SDA and SCL fall time
tHD:STA
Start Condition hold time
tSU:STA
Start Condition setup time
tHD:DAT
SDA hold time (vs. SCL falling edge)
tSU:DAT
SDA setup time (vs. SCL rising edge)
tSU:STO
Stop Condition setup time
tBUF
Bus free time
tSP
Noise suppression pulse width
[I²C bus interface timing]
1/fSCL
Min. Typ. Max.
Unit
400
kHz
0.6
s
1.3
s
0.3
s
0.3
s
0.6
s
0.6
s
0
s
100
ns
0.6
s
1.3
s
50
ns
VIH
SCL
VIL
SDA
tBUF
tLOW tR
tHIGH tF
SCL
tHD:STA
Stop Start
016014242-E-00
tHD:DAT
tSU:DAT tSU:STA
Start
-7-
VIH
VIL
tSP
VIH
VIL
tSU:STO
Stop
2016/11