AK4161EN Datasheet, PDF (8/11 Pages) Asahi Kasei Microsystems – 6-channel Capacitive Touch Sensor IC

[AK4161]
スイッチング特性
(特記なき場合は、Ta = -40C ~ 85C, VDD = 1.6V ~ 3.6V)
Parameter
Symbol min
typ
max Unit
Internal Oscillator
Fast Oscillator Period
Slow Osclillator Period
FPRD
75
125
175 ns
SPRD
21
32
43
us
Reset Timing
Reset Pulse Width (Note 15)
tRW
10
-
-
us
Reset Pin Pulse Width of Spike Noise
Suppressed by Input Filter (Note 16)
tRS
0.5
-
-
us
I2C
SCL clock frequency
Bus Free Time Between Transmissions
f_SCL
-
-
400 kHz
tBUF
1.3
-
-
us
Start Condition Hold Time (prior to first Clock pulse)
tHD:STA 0.6
-
-
us
Clock Low Time
tLOW
1.3
-
-
us
Clock High Time
Setup Time for Repeated Start Condition
SDA Hold Time from SCL Falling (Note 17)
SDA Setup Time from SCL Rising
tHIGH
0.6
-
tSU:STA 0.6
-
tHD:DAT
0
-
tSU:DAT 0.1
-
-
us
-
us
-
us
-
us
Rise Time of Both SDA and SCL Lines
Fall Time of Both SDA and SCL Lines
Setup Time for Stop Condition
Pulse Width of Spike Noise Suppressed By Input Filter
Capacitive load on bus
tR
-
-
0.3
us
tF
-
-
0.3
us
tSU:STO 0.6
-
-
us
tSP
50
-
-
ns
Cb
-
-
400 pF
Note 15. RSTN pin= “L”でリセットされます。10us 以上のパルスを入力して下さい。
Note 16. RSTN pin に内蔵されるノイズフィルタが除去できる “L”パルスのスパイクノイズ幅を示しています。
Note 17. データは最低 300ns (SCL の立下り時間)の間保持されなければいけません。
RSTN
tRW
Figure 2. Reset Timing Diagram
tRS
50%VDD
SDA
SCL
tBUF
tLOW tR
tHIGH tF
tHD:STA
Stop Start
tHD:DAT tSU:DAT tSU:STA
Start
Figure 3. I2C Interface Timing Diagram
VIH
VIL
tSP
VIH
VIL
tSU:STO
Stop
MS1450-J-02-PB
-8-
2012/12