ASAHI KASEI
[AK4644]
Parameter
Symbol
min
typ
max
Units
Control Interface Timing (3-wire Serial mode)
CCLK Period
tCCK
tCCKL
tCCKH
tCDS
tCDH
tCSW
tCSS
200
80
80
40
40
150
50
50
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
ns
ns
ns
ns
ns
ns
ns
ns
CCLK Pulse Width Low
Pulse Width High
CDTI Setup Time
CDTI Hold Time
CSN “H” Time
CSN “↓” to CCLK “↑”
CCLK “↑” to CSN “↑”
tCSH
Control Interface Timing (I2C Bus mode)
SCL Clock Frequency
fSCL
tBUF
-
-
-
-
-
-
-
-
-
-
-
-
-
-
400
-
-
-
-
-
-
-
0.3
0.3
-
400
50
kHz
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
pF
ns
Bus Free Time Between Transmissions
Start Condition Hold Time (prior to first clock pulse)
Clock Low Time
1.3
0.6
1.3
0.6
0.6
0
0.1
-
-
tHD:STA
tLOW
tHIGH
tSU:STA
tHD:DAT
tSU:DAT
tR
Clock High Time
Setup Time for Repeated Start Condition
SDA Hold Time from SCL Falling (Note 32)
SDA Setup Time from SCL Rising
Rise Time of Both SDA and SCL Lines
Fall Time of Both SDA and SCL Lines
Setup Time for Stop Condition
tF
tSU:STO
Cb
0.6
-
0
Capacitive Load on Bus
Pulse Width of Spike Noise Suppressed by Input Filter
tSP
Power-down & Reset Timing
PDN Pulse Width (Note 33)
tPD
tPDV
150
-
-
-
-
ns
1/fs
1059
PMADL or PMADR “↑” to SDTO valid (Note 34)
Note 31. I2C is a registered trademark of Philips Semiconductors.
Note 32. Data must be held long enough to bridge the 300ns-transition time of SCL.
Note 33. The AK4644 can be reset by the PDN pin = “L”.
Note 34. This is the count of LRCK “↑” from the PMADL or PMADR bit = “1”.
MS0477-E-01
2006/10
- 15 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
