TTP259
TonTouchTM
Preliminary
16 non-contact inputs touch pad detector
The touch pad detector applies the charge sharing conception. The
inputs share the pad with IO ports. Built-in charge sharing control, duty
detector and de-bounce feature can response the input with varied output
refresh rate that dependant on the system request. For power saving
concern, auto power off function and wake up de-bounce capability can
support a lower average operating current.
OSCH/
OSCL
Modulation
clock selector
Data Bus
CS
Edge
Clock
CH0
Detector
Gating
CH1
:
12-bit Duty counter &
Reload data latch
TPCTF
:
:
:
Touch pad scan & Timing control
TPCMPF
CH14
CH15
Touch pad selector
Figure: 16 pads Touch pad detector
2015/05/25
Page 69 of 81
Ver: 1.1
TTELEC [ TT Electronics ]
