AK09912 Datasheet, PDF (11/42 Pages) HuaXinAn Electronics CO.,LTD – 3-axis Electronic Compass

[AK09912]
5.3.5. I²C Bus Interface
CSB pin = “H”
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
Min.
Typ.
Max.
Unit
fSCL
SCL clock frequency
100
kHz
tHIGH
SCL clock “High” time
4.0
µs
tLOW
SCL clock “Low” time
4.7
µs
tR
SDA and SCL rise time
1.0
µs
tF
SDA and SCL fall time
0.3
µs
tHD:STA
Start Condition hold time
4.0
µs
tSU:STA
Start Condition setup time
4.7
µs
tHD:DAT SDA hold time (vs. SCL falling edge)
0
µs
tSU:DAT SDA setup time (vs. SCL rising edge)
250
ns
tSU:STO
Stop Condition setup time
4.0
µs
tBUF
Bus free time
4.7
µs
 Fast mode
100Hz≤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
µs
1.3
µs
0.3
µs
0.3
µs
0.6
µs
0.6
µs
0
µs
100
ns
0.6
µs
1.3
µs
50
ns
VIH2
SCL
VIL2
SDA
tBUF
tLOW tR
tHIGH tF
SCL
tHD:STA
Stop Start
tHD:DAT
tSU:DAT tSU:STA
Start
VIH2
VIL2
tSP
VIH2
VIL2
tSU:STO
Stop
MS1547-E-02
- 11 -
2014/7