HT56R25 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT56R25' PDF : 134 Pages View PDF
HT56R22/HT56R23/HT56R24/HT56R25/HT56R26
w
a k e -u p
H ALT
&
"ID
LE N
"=
0
N o rm a l M o d e
fM O n ,
L X T o r L IR C O n ,
fS Y S = fM
H
A
LT
&
"ID
LE N
"=
w
1
a k e -u p
S le e p M o d e
fM O ff,
L X T o r L IR C O n * ,
fS Y S = O ff
Id le M o d e
fM O ff,
L X T o r L IR C O n , #
fS Y S = O ff
H
A
LT
&
"ID
w a k e -u p
LEN "= 0
S lo w M o d e
fM O n /O ff,
L X T o r L IR C O n ,
fS Y S = fM /2 ~ fM /6 4
o r L X T o r L IR C
w
a k e -u p
H ALT
&
"ID
LE
N
"=
1
" * " D e p e n d s th e W D T e n a b le /d is a b le c o n d itio n .
" # " E ith e r th e 3 2 7 6 8 H z o r 3 2 K _ IN T m u s t b e O N .
Dual Clock Mode Operation
H ig h O s c illa to r
O SC1
E x te rn a l
C lo c k
O SC1
ERC
O SC2
O SC1
HXT
O SC2
E x te r n a l C lo c k F ilte r O ff
C o n fig u r a tio n O p tio n
E x te r n a l/X T A L /R C
C o n fig u r a tio n O p tio n
F ilte r
M UX
fM
fM
S lo w
fS L
C lo c k
C o n tro l
H L C L K B it
M UX
fS Y S
fS L O W
fM /2 , ... fM /6 4 , fS L
O SC3
O SC4
LX T
fR T C
L IR C
fR C 3 2 K
L o w O s c illa to r
M UX
fS U B
fS Y S /4
C o n fig u r a tio n
O p tio n
fS Y S /4
fS U B
M UX
T1S
M UX
fS
fS C lo c k S e le c t
C o n fig u r a tio n O p tio n
R T C in te r r u p t,
T im e B a s e in te r r u p t,
B u z z e r, W D T
fS U B
¸8
fL C D
= fS U B /8
LC D
Dual Clock Mode Structure
T im e r 1
Rev. 1.30
32
December 26, 2014
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