Ic Block Diagram （Icブロック図 - Yamaha ACU16-C Service Manual

IC BLOCK DIAGRAM
TC74LVX4245FS (XU229A00)
MAIN: IC403
TRANSCEIVER
V
CCA
1
DIR 2
Logic
Level
Converter
G 22
A1 3
A8 10 Same as above block
11
TC74VHC138FT (XZ495A00)
MAIN: IC205, IC206
3-8 DEMULTIPLEXER
1
16
A Vcc
A
Select
2 B 15
Y0
B YO
3
C Y1 14
C Y1
4
G2A Y2 13
G2A Y2
Enable
5
G2B Y3 12
G2B Y3
6
G1 Y4 11
G1 Y4
Output
7 10
Y7 Y5
Y7 Y5
Y6
8
9
GND Y6
TC74VHC32FT (XY945A00)
MAIN: IC210, IC213, IC216, IC217
OR
1A 1 14 Vcc
1B 2 13 4B
1Y 3 12 4A
2A 4 11 4Y
2B 5 10 3B
2Y 6 9 3A
GND 7 8 3Y
（IC ブロック図）
V
CCB
23 24
21 B1
14 B8
12 13
TC74VHC163FT (X2378A00)
MAIN: IC313, 507, 508
CLEAR 1
CLOCK 2
A 3
B 4
Output
C 5
6
D
ENABLE
7
P
GND 8
TC7S04F (XM182A00)
DAC: IC211, IC411
TC7SH04FU (XS775A00)
MAIN: IC413, IC419
INVERTER
1
NC
IN 2
3
VSS
V 1 24
V
CCA CCB
2 23
DIR V
CCB
3 22
A1 G
A2 4 21 B1
5 20
A3 B2
6
A4 19 B3
7 18 B4
A5
17 B5
A6 8
16 B6
A7 9
A8 10 15 B7
GND 11 14 B8
GND 12 13 GND
(TOP VIEW)
TC74VHC244FT (XW234A00)
MAIN: IC402, IC408, IC409
BUS BUFFER
16 Vcc
RIPPLE
CK R 15 CARRY
OUTPUT
C
A QA 14 QA
B QB 13
QB
QC
C 12 QC
QD
D 11 QD
EN EN
ENABLE
P T 10
T
9 LOAD
5
VDD
4
OUT
INPUTS FUNCTION
OUTPUTS
G DIR A-BUS B-BUS
L L A=B OUTPUT INPUT
L H B=A INPUT OUTPUT
X : Don't Care
H X Z High lmpedance
Z : High lmpedance
1 20
1G V (Vcc)
DD
2 19
1A1 2G
3 18
2Y4 1Y1
17
1A2 4 2A4
2Y3 5 16 1Y2
6 15
1A3 2A3
7 14
2Y2 1Y3
8 13
1A4 2A2
9 12
2Y1 1Y4
11
(GND) Vss 10 2A1
ACU16-C
17