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