Yamaha CDR-HD1500 Service Manual page 38

CDR-HD1500
IC401 : M66005-0141AFP (OPERATION P.C.B.)
FL tube driver
14
CS
15
SCK
SDATA 16
21
XIN
20
XOUT
RESET 13
19
Vcc1
60
Vcc2
22
Vss
32
Vp
No. Name
1 DIG11
2 DIG10
3 DIG09
4 DIG08
5 DIG07
6 DIG06
7 DIG05
8 DIG04
9 DIG03
10 DIG02
38
Display code RAM
( Bank 1 : 8bit x 16 )
Bank 2 : 8bit x 64
code
write
Serial Code/
data
receive command
circuit control
circuit
code
select
Clock
timing
Display
clock
generator
controller
IN/OUT
O Digit output
O Digit output
O Digit output
O Digit output
O Digit output
O Digit output
O Digit output
O Digit output
O Digit output
O Digit output
CGROM
(35bit x 160)
Segment
output
circuit
CGRAM
dot data
(35bit x 16)
write
Segment/
Digit
select/
output
circuit
scan pulse
Digit
output
circuit
2
Function
59
SEG00
33 SEG26
31
SEG27
24 SEG34
23 SEG35
64 DIG12/SEG36
63
DIG13/SEG37
DIG14/SEG38
62
61
DIG15/SEG39
12
DIG00
1 DIG11
18
P0
17 P1