Holtek BS82B12A-3 Manual page 106

The touch key sense oscilltor and reference oscillator timing diagram is shown in the following
figure:
TKST
MnKOEN
MnROEN
KEY OSC CLK
Refe�ence OSC CLK
f enable
CFTMCK
f (MnDFEN=0)
CFTMCK
f (MnDFEN=1)
CFTMCK
TKRCOV
Rev. 1.20
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
(2�6-TKTMR) ove�flow *�2
M 0 K 4 I O
E x t e r n a l P i n
I / O o r T o u c h K e y
M 0 K 3 I O
E x t e r n a l P i n
I / O o r T o u c h K e y
M 0 K 2 I O
E x t e r n a l P i n
I / O o r T o u c h K e y
M 0 K 1 I O
E x t e r n a l P i n
I / O o r T o u c h K e y
Touch Key or I/O Function Select
106
Ha�dwa�e clea� to "0"
Set To�ch Ke� inte���pt �eq�est flag
b i t
T o u c h C i r c u i t s
L o g i c I / O c i r c u i t s
b i t
T o u c h C i r c u i t s
L o g i c I / O c i r c u i t s
b i t
T o u c h C i r c u i t s
L o g i c I / O c i r c u i t s
b i t
T o u c h C i r c u i t s
L o g i c I / O c i r c u i t s
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