AK4186 Datasheet, PDF (6/33 Pages) Asahi Kasei Microsystems – Low Power Touch Screen Controller with I2C Interface

[AK4186]
SWITCHING CHARACTERISTICS
(Ta=-40°C to 85°C, VDD=1.6V to 3.6V)
Parameter
Symbol
min
typ
Internal OSCILATOR
Clock Frequency
f_OSC
2.5
3.6
Touch Panel (A/D Converter)
SCL clock frequency
fSCL
-
-
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 (Note 7)
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 7: Data must be held for sufficient time to bridge the 300ns transition time of SCL.
max Units
5.1 MHz
400 kHz
-
μs
-
μs
-
μs
-
μs
-
μs
-
μs
-
μs
0.3
μs
0.3
μs
-
μs
50
ns
400
pF
SDA
SCL
tBUF
tLOW tR
tHIGH tF
tHD:STA
Stop Start
tHD:DAT tSU:DAT tSU:STA
Start
Figure 2. Timing Diagram
VIH
VIL
tSP
VIH
VIL
tSU:STO
Stop
MS1068-E-04
-6-
2011/03