ASAHI KASEI
[AK8817/18]
(5) I2C Bus Input/Output Timing < Ta = -30 ~ +85 °C >
tR
tHD:STA
tBUF
tSU:STO
tF
VSDAH
VSDAL
SDA
SCL
tF
tR
VSDAH
VSDAL
tSU:STA
tLOW
(5-1) Timing 1
VSDAH: 0.8PVDD
VSDAL : 0.2PVDD
Parameter
Bus Free Time
Symbol
tBUF
Min.
1.3
0.6
1.3
Max.
Unit
usec
usec
usec
nsec
nsec
usec
usec
Hold Time (Start Condition)
Clock Pulse Low Time
tHD:STA
tLOW
tR
Input Signal Rise Time
300
300
Input Signal Fall Time
tF
Setup Time(Start Condition)
Setup Time(Stop Condition)
tSU:STA
tSU:STO
0.6
0.6
The above I2C bus related timing is specified by the I2C Bus Specification, and it is not limited by the device
performance. For details, please refer to the I2C Bus Specification.
(5-2) Timing 2
tHD:DAT
VSDAH
SDA
VSDAL
tHIGH
VSDAH
SCL
VSDAL
tSU:DAT
VSDAH: 0.8PVDD
VSDAL : 0.2PVDD
Parameter
Symbol
tSU:DAT
tHD:DAT
tHIGH
Min.
100 (note1)
0.0
Max.
Unit
nsec
usec
usec
Data Setup Time
Data Hold Time
0.9 (note2)
Clock Pulse High Time
0.6
note 1 : when to use I2C Bus Standard mode, tSU:DAT >- 250 ns must be met.
note 2 : when the AK8817/18 is used in such bus interface where tLOW is not extended ( at minimum specification of
tLOW ), this condition must be met.
Rev.001E
17
2009 / 12
AKM [ ASAHI KASEI MICROSYSTEMS ]
