AK4160 Datasheet, PDF (37/40 Pages) Asahi Kasei Microsystems – 16-channel Capacitive Touch Sensor IC

[AK4160]
SYSTEM DESIGN
Figure 18 and Figure 19 show the system connection diagram for the AK4160. An evaluation board [AKD4160]
demonstrates the optimum layout, power supply arrangements and measurement results.
<16ch Touch Switch>
VDD
SCL
Touch Switch
SDA
uP
RSTN
789x
IRQ0N
IRQ1N
IRQ2N
CS0 ~ CS15
456 /
AK4160
AD1
AD0
123+
47nF
100Kohm
VREG
RREF
VSS
0 = AC –
Figure 18. Typical Connection Diagram for 16ch Touch Switch
<8ch Touch Switch & 8ch LED Display >
VDD
SCL
Touch Switch
SDA
VOL VOL
CH
CH
uP
RSTN
UP
DN
UP
DN
IRQ0N
IRQ1N
IRQ2N
CS0 ~ CS7
AK4160
ON
OFF
MEN U
EXT
MUTE
AD1
AD0
LED Display
47nF
100Kohm
VREG
RREF
VSS
GPIO0 ~ GPIO7
Figure 19. Typical Connection Diagram for 8ch Touch Switch & 8ch LED Display
Note:
- These figures are the connection diagram when the AD0 pin = “L” and the AD1 pin = “L”. In case of the
AD0 pin = “H” or the AD1 pin = “H”, their pin must be connected to VDD.
- VSS of the AK4160 should be distributed separately from the ground of external controllers.
- All digital input pins (SCL, SDA, AD0, AD1, RSTN pins) must not be left floating.
MS1313-E-01
- 37 -
2011/11