HT47R20A-1 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT47R20A-1' PDF : 43 Pages View PDF
Block Diagram
P B 0 /IN T
P ro g ra m
EPRO M
P ro g ra m
C o u n te r
STAC K
In te rru p t
C ir c u it
IN T C
In s tr u c tio n
R e g is te r
MP
M
U
D ATA
M e m o ry
X
In s tr u c tio n
D ecoder
T im in g
G e n e ra to r
O SC2
O SC4
C1
C2
O SC1
O SC3
RES
VDD
VSS
H a lv e
V o lta g e
M UX
A LU
S h ifte r
STATU S
BP
ACC
LC D
M e m o ry
L C D D r iv e r
V 1 V 2 V LC D C O M 0 ~ C O M 3 / S E G 0 ~
C O M 2 S E G 19 S E G 18
HT47R20A-1/HT47C20-1
T im e r A
S y s te m C lo c k
M
T1
U
R T C O u tp u t
X
P B 2 /T M R
O v e r flo w
PFD
T im e r B
A /D C lo c k
R C T ype
A /D C o n v e rte r
P A 3 /P F D
IN 0
CS0
RS0
C R T0
R T0
IN 1
CS1
RS1
R T1
R TC
W DT
T im e B a s e
S Y S C L K /4
M
U
R TC O SC
X
W DT O SC
P o rt B
PB
P o rt A
PA
H A L T E N /D IS
P B 0 /IN T
PB1
P B 2 /T M R
PB3
P A 0 /B Z
P A 1 /B Z
P A 2 /IR
P A 3 /P F D
P A 4~P A 7
O SC3
O SC4
L V D /L V R
Rev. 1.80
2
June 23, 2008
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