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TTP259-ASFN Datasheet(PDF) 49 Page - Tontek Design Technology

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

TTP259-ASFN Datasheet(HTML) 49 Page - Tontek Design Technology

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Preliminary
TTP259
TonTouch
TM
2015/05/25
Page 49 of 81
Ver: 1.1
. IO Pad Cell Structure and Function Description
.. IO port with touch pad input
The input/output port has the IO control register for switching input or
output mode and data register stores the output data in output mode. If IO
control register=1 and output data=1, the IO port is programmed as input
with pull-up resistor and also actives the wake-up function. User intends to
read the port data with differed read instruction. The read PxI is reading data
comes from IO pad data. The data register reading result will have the same
value with output register data. Software can performs a configuration
(output data register=0, changing the IO control register 0 or 1) for open
drain type that specifies suitable for key scan application. An additional
feature supports the touch pad input.
X: don’t care the value
Extern input
IO control data
Output data
Pull-up
R
Wake-up
feature
Disable
0
X
No
No
Disable
1
0
No
No
Disable
1
1
Enable
Enable
Enable and touch
pad scan
X
X
No
No
IO control data
IO pad
0
Output register data
1
IO pad input data
Read PxI
Read input data
1
IO pad data



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