Lcd Driver (Msm5829Gs) - Aiwa CS-880 H Service Manual

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CS-880H,HG,U,UC
• The function in parentheses ¡s displayed by key operation based
on a momentary switch (marked oo ).
• Manual/auto selection (*1)
Manual/auto selection is performed by a fixed switch but in this
unit the key operations are carried out with momentary switches
which, thanks to the flip-flop circuit, have the same functions as
fixed switches.
When connected: Auto tuning
When disconnected: Manual tuning
• LCD static/dynamic selection (*2)
This determines whether the LCD display system should be
static or dynamic. In this unit, static specifications apply and so
the diode is shorted.
• IF frequency selection (*3 , *4)
Alignment is made with the FM IF frequency by IF , and IF 0
shorting and open combinations. The IF frequencies used by this
unit are 10.675 MHz, 10.700 MHz and 10.725 MHz and so the
combinations appear as follows:
1 F offset frequency
10.675 MHz (blue)
10.700 MHz (red)
10.725 MHz (orange)
Color of ceramic filter indicated in parentheses.
• Japan/US use selection (*5)
When connected: U S specifications
When disconnected: Japan specifications
• AM frequency interval selection (*6)
The AM channel frequency intervals are selected to 10 kHz or.
9 kHz.
When connected: 10 kHz
When disconnected: 9 kHz
3-3.

LCD driver (MSM5829GS)

Indication is provided on the LCD by connecting the three
serial output data from the controller (jiPD1703C-515)
B2
C2
DP2
Q I
Dl
C X
E l
C E
SI
M S M 5 8 2 9 G S
e x
FI
cm
A I
Bl
□
e
Cl
□si
□ E
DPI
OH
FI
L S I
F 2
c :
h COM
"
8
IF ,
'F 0
Open
Shorted
Open
Open
Shorted
Shorted
m
DP4
4TI
CH
4Ö1
551
NC< .^ ftl
a n
nfil
3 5 1
351
OP 5
C 5 331
ä U
B 5
3TI
A5
F5 3 0 ]
<55 2 Q
Fig. 7
24
Pin no. Name
SEG M EN TO U T
8 ,9 ,1 0 ,4 A 1 ,B1 ,C 1 , D1 LCD segment output pins
E1, F1.G1 (see Fig. 8*)
5, 7 ,6 ,
A2, B2, C2, D2
5 6 ,1 ,2 ,5 2
53, 55, 54 E2, F2, G2
31,32,33,27 A5, B5, C5, D5
28, 30, 29 E5, F5, G5
47, 48, 50, 43 A A, BA , CA, DA
EA , FA , GA
44,46,45
12,13 F 1 ,F2
11.3, 51, DP1, DP2, DP3,
42, 34, DP4, DP5
41 CH
15 Ground Pin
V ss
LCD AC drive frequency pin;
OSC
16
with this unit, the circuit is con­
figured as beiow.
S E R IA L OUT Not used
17
S E R IA L IN Data indicated with shift regis­
18
ter data input pins are fed into
this pin in synchronization with
clock pulses. (Connected to pin
19 of controller IC)
CLOCK Sync, input pin when data is fed
19
into, or fed out of shift register.
(Connected to pin 9 of control­
ler IC)
Input
LOAD
2 0
register contents.
High: Shift register contents are
Low: Final contents at high
Power supply pin
21,49
V
d d
Not used
22 BI/RBO
This function is not used and so
23 SELEC T
pin is always at high level or, in
other words, it is connected to
V DD-
24 R BI Pin for determining whether or
not leftmost display digit is to
indicate a numeral or not. In
this unit, it displays only signifi­
cant figures and so it is used at
the low level, or in other words,
it is connected to Vgs (ground).
R ESET Pin for switching display to
25
segment or dot; since segment is
used in this unit, it is set to high
level or, in other words, it is
connected to V
26 COM This pin feeds out an output
with the reverse phase to that of
COM. In this unit, it is not used
for direct display but for AM
and FM +B selection as men­
tioned later.
This pin feeds out a signal with
14 COM
the reverse phase to that of out­
put and 7 segments for AC
drive of the LCD; it drives the
LCD common pin.
35, 36, 37 Not used
38, 39, 40
DP 2 { I EMOI
m p
DP4 { I FM I---
DP3 { I MW I- -
F I
AA
PIN
I
(PIN @ >
GA
LCD
[ AIW A
Function
pin for latching shift
transmitted to decoder.
level are held (Connect­
ed to pin 10 of controller
IC)
*
d d
CH A 5 ~ F5
I ] £
P c h
P
u
u
- T T I
k h
A2 A I
\
X
G2
Gt
D ISPLA Y
Fig. 8