HT47C20 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT47C20' PDF : 56 Pages View PDF
Block Diagram
P B 0 /IN T
P ro g ra m
ROM
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
C1
C2
O SC1
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
V1 V2 V3
C O M 0~ C O M 3/ S E G 0~
C O M 2 S E G 19 S E G 18
HT47C20
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
T im e r B
P.D
A /D C lo c k
R C T ype
A /D C o n v e rte r
P A 3 /P . 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
O SC3
O SC4
P o rt B
PB
P o rt A
PA
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 . D
P A 4~P A 7
Rev. 1.60
2
July 26, 2002
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