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TTP259-ASFN Datasheet(PDF) 70 Page - Tontek Design Technology

Part # TTP259-ASFN
Description  Preliminary
PDF  81 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TONTEK [Tontek Design Technology]
Direct Link  http://www.tontek.com.tw
Logo TONTEK - Tontek Design Technology

TTP259-ASFN Datasheet(HTML) 70 Page - Tontek Design Technology

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Preliminary
TTP259
TonTouch
TM
2015/05/25
Page 70 of 81
Ver: 1.1
Parameters
Target value
Remark
Touch pad OSC
4MHz or 16KHz
Using OSCH or OSCL
Modulation clock
OSCH/N or OSCL
N=1,2,4,8,16,32,64
Duty counter
12-bit
With INT
Reload data latch
12-bit
Write only
Touch pads
1~16 pads
-
Key de-bounce time
s/w implements
By application or cover thickness
Sensitivity level
Offset value by s/w
Resolution=1 modulation clock
The flowchart as follow:
CHECK
TPCTF=1
WRITE FFFH TO
TPCT0~2
FOR
TPCT0~2=000H
NO
SET MCKS
SET TPCHS3~0
WHEN SET
TPCHS0 WILL
START SCAN
AND CLEAR
TPCTF, TPCMPF
COUNT
OVERFLOW
ERROR
YES
NO
YES
TPCTL=3
CHARGE TIME
(ABOUT 100uS)
CHECK
TPCMPF=1
SAVE TPCT0~2
THEN TPCTL=0
TOUCH
PROGRAM
RTS
SET TPCTL=1
START SCAN



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