TTP258
TonTouchTM
Preliminary
. I/O PAD Cell Structure & Function Description
Input Port
The input port can be programmed as input with pull-up resistor and input
data can read by port reading command. Then a wake-up function also offers
the system wake up feature for keys or special external triggers then a wake-up
function also offers the system wake up feature for keys or special external
triggers.
Input Data
Pull-up
Read Data
Wake-up
Active
0
R
No
R
0
0
1
1
1
?
0
Inhibited
Non-active
1
1
No
R
Inhibited
Floating
Floating
Non-active
Inhibited
No
R: pull-up resistor
X: don’t care the value
?: unknown
Pull-High R
Wake-up
P
PAD
Read
Data
External Input
Figure IO-E: Input Port
16’/04/06
Page 27 of 44
Ver.: 1.2
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