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MODE INSTRUCTION
FORMAT
SYNCHRONOUS MODE
TRANSMIT/RECEIVE
FORMAT
SYNCHRONOUS MODE
North Star HSIO-4
D4
o5
D?
De
3
d
SCS ESD
EP
PEN
l 2
CPU BYTES (5-8 BITS/CHAR)
---------- fi----------
DATA CHARACTERS
----------------
ASSEMBLED SERIAL DATA OUTPUT (TxD)
SYNC
SYNC
CHAR 1
CHAR 2
TRANSMIT FORMAT
SERIAL DATA INPUT (RxD)
SYNC
SYNC
CHAR 1
CHAR 2
CPU BYTES <5-8 BITS/CHAR)
-------
DATA CHARACTERS
-------
RECEIVE FORMAT
88
2
D l
d
D0
O
O
Li
CHARACTER LENGTH
0
0
5
BITS
PARITY ENABLE
(1 = ENABLE)
(0 = DISABLE)
EVEN PARITY GENERATION/CHECK
1 = EVEN
0 = ODD
EXTERNAL SYNC DETECT
1 = SYNDET IS AN INPUT
0 *» SYNDET IS AN OUTPUT
SINGLE CHARACTER SYNC
1 = SINGLE SYNC CHARACTER
0 = DOUBLE SYNC CHARACTER
1 ---------------
i
---------------------------
-------------------------
1
DATA CHARACTERS
----------------------------
-------------------------
( i
------------ * * -----------
DATA CHARACTERS
----------------------------
\ ^
-------------------------
f *
-------
f f
------
User/Technical Manual
1
0
1
0
1
1
6
7
8
BITS
BITS
BITS
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