Yamaha YHT-S300 Service Manual page 57

IC851: M66003-0131FP (POWER P.C.B.)
FL display driver
Pin No. Port Name Function Name
1 RESET
2 CS
3 SCK
4 SDATA
5 Vss
6 XOUT
7 XIN
Display code
RAM
(8-bit x 60)
Code
write
2 Serial
CS
data
receive
SCK 3
Code/
circuit
SDATA 4
command
control
circuit
XIN 7
Clock
timing Display
generator clock
controller
XOUT 6
RESET 1
Vcc1 8
Vcc2 18
Vss 5
Vp
64
RESET
CS
SCK
SDATA
Vss
XOUT
XIN
Vcc1
SEG34
SEG33
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
I/O
/RESET Reset input
/CEFL Chip select input When "L" , communication with the MCU is possible.
CKFL Shift clock input When "H" , any instruction from the MCU is neglected.
DTFL Serial data input
VSS
XOUT Clock out
XIN Clock in
SR-300/NS-BR300/NS-P705/NS-B380
CGROM
(35-bit x 166)
Segment
output
circuit
CGROM
dot data
(35-bit x 16)
write
Segment/
code
Digit
select
select/
output
circuit
scan pulse
Digit
output
circuit
DIG15/SEG38
DIG16/SEG37
DIG17/SEG36
SEG35
SEG00
SEG01
SEG02
SEG03
SEG04
SEG05
SEG06
SEG07
SEG08
SEG09
SEG10
SEG11
Detail of Function
When "L" , M66003 is initialized.
Serial input data is taken and shifted by the positive edge of
SCK.
GND (0V)
When use as a CR oscillator, connect external resistor and
capacitor.
When use an external clock input external clock to XIN, and
XOUT must be opened.
44 SEG00
19 SEG25
17 SEG26
SEG34
9
45 SEG35
DIG11/
52
SEG42
DIG12/
51
SEG41
DIG13/
50
SEG40
DIG14/
49
SEG39
DIG15/
48
SEG38
DIG16/
47
SEG37
DIG17/
46
SEG36
63 DIG00
53 DIG10
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