BS85B12-3_12 Datasheet, PDF (45/183 Pages) Holtek Semiconductor Inc – Touch Key Flash Type 8-Bit MCU with LCD/LED Driver

BS85B12-3/BS85C20-3/BS85C20-5
Touch Key Flash MCU with LCD/LED Driver
H ig h S p e e d O s c illa to r
H IR C
fH IR C
8 M H z /1 2 M H z /1 6 M H z
H ig h S p e e d C lo c k S e le c t
H IR C S 0 , H IR C S 1 b its
L IR C
32kH z
L o w S p e e d O s c illa to r
P e r m a n e n tly E n a b le d
f L IR C
f L IR C
f L IR C
6 - s ta g e P r e s c a le r
fH IR C /n
n = (2 , 4 , 8 , 1 6 , 3 2 o r 6 4 )
32kH z
M
U
X
fH IR C /n o r fL IR C
C lo c k S e le c t
C K S 0 ~ C K S 2 b its
W a tc h d o g T im e r
fS Y S /4
M
U
X
T B C K b it
System Clock Configurations – BS85B12-3/BS85C20-3
M
U
fS Y S
X
F a s t/S lo w
C lo c k S e le c t
H C L K b it
T im e B a s e 0
T im e B a s e 1
H ig h S p e e d O s c illa to r
H IR C
8 M H z /1 2 M H z /1 6 M H z
H ig h S p e e d C lo c k S e le c t
H IR C S 0 , H IR C S 1 b its
L o w S p e e d O s c illa to r
f L IR C
L IR C
32kH z
fH IR C
6 - s ta g e P r e s c a le r
fH IR C /n
n = (2 , 4 , 8 , 1 6 , 3 2 o r 6 4 )
32kH z
F a s t/S lo w
C lo c k S e le c t
M
U
X
fH IR C /n o r fL IR C
M
U
fS Y S
X
H C L K b it
C lo c k S e le c t
C K S 0 ~ C K S 2 b its
f L IR C
W a tc h d o g T im e r
fS Y S /4
M
LX T
fT B C
U
X
T B C K b it
System Clock Configurations – BS85C20-5
T im e B a s e 0
T im e B a s e 1
Rev. 1.20
45
August 10, 2012