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• Construction of Circuit
The serial interface card consists ?f the following six blocks.
• Block 1
Hybrid IC circuit
D'
D'
HOOO2PA
01
D.
D'
D'
.
..,.
01
D'
00
IhO'
Cl
It" •
1111
.1JII1i
rntI
•
•
In
1t11'T
CTITI
A'
r
AD
'1'
'1'
'10
.10
DTItI
..
rnn
• RT1il
DCDI
••
.,.0 ....
N.C
IY"CI
..
N.C
,.DA
H
•• 0&
. .
It'l.
CITA
DT ••
DCD"
+.v
.,,,oYA
'''''CA
)
IND
U.
U.
•
••
•
Block Diagram of Hybrid IC
0,
D.
Data BUI
0,
Driver
<:>
~
..
0
Channel A
Read/Writa
.Reglsters
D.
0,
)
O
2
D.
Do
lr
Bus
fG:
Intetnal Bus
Interface
Logic
U
U
D
Channel B
Internal
Read/Write
Control
Registers
Logic
IORO
RD
Ml
CE
RESET
~
A.
AD
ExlNT
~
I!"terrupt
Control
"-r--
Logic
IEI
IEO
)
I
BRl
BR2
4
•
•
.
..,
.
....
"TI'
C'I'I
DT.'
DCOI
'IDA
'hO&
ItTI"
CSTA
0'"''
DCO'
~
~
Channel A
Data
&
Control
Channel B
Data
&
Control
TxDA
RxDA
RTSA
CTSA
DTRA
DCDA
W/RDYA
SYNCA
TxDB
RxDB
RTSB
CTSB
DTRB
DCDB
W/RDYB
SYNCA
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