AK7719 Datasheet, PDF (13/16 Pages) Asahi Kasei Microsystems – Low Power DSP for Voice and Audio Processing

CONFIDENTIAL
[AK7719]
■ I²CBUS Interface
(Ta=-20ºC~85ºC, VDD=1.2V, VDD=1.6~3.6V, VSS =0V, CL=20pF)
Parameter
Symbol
min
I²C Timing
SCL clock frequency
fSCL
30
Bus Free Time Between Transmissions
tBUF
1.3
Start Condition Hold Time
(prior to first Clock pulse)
tHD:STA
0.6
Clock Low Time
tLOW
1.3
Clock High Time
tHIGH
0.6
Setup Time for Repeated Start Condition
tSU:STA
0.6
SDA Hold Time from SCL Falling
tHD:DAT
0
SDA Setup Time from SCL Rising
tSU: DAT
0.1
Rise Time of Both SDA and SCL Lines
tR
Fall Time of Both SDA and SCL Lines
tF
Setup Time for Stop Condition
tSU:STO
0.6
Pulse Width of Spike Noise Suppressed
by Input Filter
tSP
0
Capacitive load on bus
Cb
Note 15. I²C-bus is a trademark of NXP B.V.
typ max Unit
400
kHz
μs
μs
μs
μs
μs
0.9
μs
μs
0.3
μs
0.3
μs
μs
50
ns
400
pF
SDA
tBUF
tLOW tR
tHIGH tF
SCL
tHD:STA
Stop Start
tHD:DAT
tSU:DAT tSU:STA
Start
Figure 9. I²C Bus Interface
VIH
VIL
tSP
VIH
VIL
tSU:STO
Stop
MS1351-E-00-PB
13
2012/01