NorthStar HSIO-4 User's & Technical Manual page 91

MODE
INSTRUCTION FORMAT
ASYNCHRONOUS MODE
TRANSMIT/RECEIVE
FORMAT
ASYNCHRONOUS MODE
North Star HSIO-4
4
D? d
De D5
D3
EP
PEN
s 2 Si
l 2
START
T xD M ARKING
START
RxD
ASSEMBLED S E R IA L D A T A OUTPUT (TxD)
----------------------
START
BIT
---------------------- ( i--------------------------
--------
START
BIT
-------- $ i
N O T E © IF CHARACTER LENGTH IS DEFINED AS 5. 6. OR 7
BITS; THE UNUSED BITS ARE SET TO "Z E R O ."
86
2
d
Ol
D0
2
Li b
Bl
BAUD RATE FACTOR
0
0
SYNC
MODE
CHARACTER LENGTH
0
0
5
BITS
PARITY ENABLE
1= ENABLE
EVEN PARITY GENERATION/CHECK
1 = EVEN
NUMBER OF STOP BITS
0
0
INVALID
f
----- 5 ---
D A TA BITS
BIT
----- ( f ---
TRANSMITTER OUTPUT
------ ' > ----
D A T A 8ITS
BIT
------ ) > ----
RECEIVER INPUT
CPU BYTE (5-8 BITS/CHAR)
------- 1 1 -------
D A TA CHARACTER
--------i * -------
--------------------------
PARITY
{ f
D A TA CHARACTER
TRANSMISSION FORMAT
SERIAL D A T A INPUT (RxD)
i '
------
DATA CHARACTER
— -------------
CPU BYTE (5-8 B IT S /C H A R )©
f f
---— --- -- — - -
DATA CHARACTER
---------------------------- ( $ ------------------------
RECEIVE FORMAT
User/Technical Manual
1 0
1
0
1 1
(IX )
(16X) (64 X)
1
0
1
1
0 1
7 8
6
BITS BITS BITS
0 = DISABLE
0 = ODD
1
0 1
0 1
1
2
1 1%
BIT BITS BITS
L
- - »-- 1
PARITY
STOP
BIT
BITS
i
---------- —
11
L
PARITY
STOP
BIT
BITS
---------- >
f
STOP
BITS
BIT
y
■ - J
{
PARITY STOP
BIT BITS
l i
--- --