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9. 3. 2 F un ct i o n s
C ont rol i s effect ed fo r t h e pu s h -s wi t ches t o be u s ed when t he us er ch anges t h e param et ers , i n order t o m odi fy t he
res pec t i ve s et t i n g v al u es . W het her t he s wi t ch h as been pres s ed i s i d ent i f i ed wi t h t h e s wi t ch i n put l ev el t h at i s
t urned "L".
Each s wi t ch i n pu t p ort i s pu l l ed up at ou t s i de o f AS IC .
Each p aram et er i s s t o red i n t h e EEP R OM , t he con t en t s o f whi ch are upda t ed as req ui red .
9 . 4
C ont ro l of d efi n i t i on co n v ert er LS I I3 00 .
9. 4. 1 P ort s rel at e d t o co nt ro l
P i n N o .
1 5 9
5
6
9. 4. 2 F un ct i o n s
M aj or f un ct i on o f I 3 00 are as f o l l o ws :
(1) Ex pans i on o f t he di s pl ay s creen .
(2) Ti m i ng co nt ro l fo r v ari o u s s i g nal t yp es .
(3 ) P o wer -s u pp l y s e qu e n ce (LC D p an el ).
2
9 . 5
I
C bus c o nt ro l
9. 5. 1 R el at ed port s o f I3 03
P o r t
P 1 . 7
P 1 . 6
2
9. 5. 2 I
C - cont rol l ed fun ct i o ns
The fo l l owi n g fu n ct i on al c o n t ro l s ar e effect ed by I
(1) C ont rol o f EEP R OM I3 0 4 for param et er s et t i n g.
Circuit Description
I/O
S i g n a l n a m e
I
I R Q
i n t e r r u p t s i g n a l
I/O
S C L
s e r i a l c l o c k
I/O
S D A
s e r i a l d a t a
P i n N o .
I/O
S i g n a l n a m e
1 4
O
S C L
1 3
I/O
S D A
2
C .
F u n c t i o n
F u n c t i o n
I I C b u s c l o c k
I I C b u s d a t a
H15AAX (AL502)
Page 5
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