User`s manual

4-14 Universal Command Converter Motorola
SBus Host Interface Card Schematics
Figure 4-6. SBUS Address Decoders (1 of 4)
LAST_MODIFIED=Wed Jul 14 13:08:27 1993
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
ALS245
A A A A A A A A
DIRE
B B B B B B B B
TS
0 2
S S
2B
2A
1
EN
EN
EN
ALS138
1
Y Y Y Y Y Y Y Y0
1 2 3 4 5 6 7
S
DEMUX
U15
CY7C291
O0 O1 O2 O3 O4 O5 O6 O7
A10
A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
CS2 CS3 CS1
CLK/I
I
I
I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O
I I I I I I I I I
ALS04
ALS08
ALS04
ALS04
ALS04
ALS08
PAGE: DATE:
TITLE:
A A B B C C D
D
1
12
23
34
45
56
67
78
8
ALS08
12/25/90
1 of 4
SBUS ADDRESS DECODERS
RESET
S_RESET
U5
3
2 1
S_PA<02> S_PA<01> S_PA<00>
DB_EN*
13
12
11
U5
11 10
U1
56
U1
U1
98
U5
6
5 4
U1
34
U3
22V10
13
2 1
11 10
9 8 7 6 5 4
3
14 15 16 17 18 19 20 21 22 23
23 22 21 20 19 18
17 16 15 14 13 11 10
98
7 6 5 4 3 2 1
vcc
S_Ack(0) S_Ack(1) S_Ack(2)
vcc
S_Rd
rom_sel* reg_sel*
write_ack*
read_ack*
q0 q1
S_siz(1) S_siz(0)
S_AS S_SEL
S_Rd
S_PA<11>
S_Clk
S_siz(2)
d<31> d<30> d<29> d<28> d<27> d<26> d<25> d<24>
S_PA<09> S_PA<08> S_PA<07> S_PA<06> S_PA<05> S_PA<04> S_PA<03> S_PA<02> S_PA<01> S_PA<10> S_PA<00>
Add<0> Add<1> Add<2> Add<3>
U12
1 2 3
4
56
7 9
10 11 12 13 14 15
119
S_D<24> S_D<25> S_D<26> S_D<27> S_D<28> S_D<29> S_D<30> S_D<31>
D<24> D<25> D<26> D<27> D<28> D<29> D<30> D<31>
U11
911 812 713 614 515 416 317 218