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cDq-He700
. fC4Ol Display controller (qPD752OGGF-716.38E)
In charge of displaying the FL tube and keying in, it exchanges data with the IC20l (CD system conrroller) in 4-bit parallel mode.
P i n N o .
P i n N a m e
UO
Description
I
2 - l l
1 2 - t 5
16, t7
l 8
RESET
G r - r 0
I , k
VLOAD
I
o
o
o
System reset input. "L": Reset
Digital oupur to rhe FL tube
Not in use with the model (opcn)
FL tube segment output
Power supply for the FL tube conrroller (builtin) G32V)
l 9
2 0 - 2 5
26
2 7 , 2 8
29,30
VPRE
J - e
Voo
d , c
b , a
o
o
o
Power supply for the FL tube predriver G3.5V)
FL tube segment output
Power terminal (+5V)
FL tube segment output
FL tube segment, key scan output
3 1 , 3 2
33
34
35
36
TEST
SELECT
BSIN
DPCLK
I
I
I
I
I
Not in use with the model (GND)
Test mode input. "L": Test mode
Not in use wirh rhe model (pull up)
Not in use with the model (pull up)
Display dara tansfer clock inpur from IC20l (CD system conrroller)
37, 38
39
N , 4 l
42
4 3 - 4 É ,
KEY REQ
DPDATAG3
I
o
o
o
UO
Not in use with the model (pull up)
Not in uæ wirh the model (pull up)
Not in use with the model (open)
Key data rcqucst ourpur to IC20l (CD sysrem controller)
Key data ouput and display data input with IC20l (CD syslem conrnoller)
4 7 - 5 0
5 r , 5 2
5 3 , 5 4
55
56
KEYG3
X I
I
I
I
o
I
Key daa input
Not in use with the model (pull up)
Not in use with the model (GND)
Not in use with the model (open)
System clock input (4.19 MHz)
5 7
58
59
6 0 - 6 / ,
x2
Vss
I
I
o
System clock input
Power supply terminal (GND)
Not in use with rhe model (GND)
Not in use wirh rhe model (open)
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