DEC VT220 - 2681 DUART: Mode Register 2 (MR2) (Channel A and B)

MR2A ADDRESS
MR2B ADDRESS
B7FOH (RD)/B7FOH (WR)
B7F8H (RD)/B7F8H (WR)
07
06
05
04 03
02
01
00
I
CTS
I
CHANNEL
T.
MODE
RTS
ENABLE
STOP BIT
LENGTH
T.
I I
I
{BADl HI .. 4_-----------------_ .... (BAOO H)
BIT VALUES
BIT
&-7
BIT 5
B!T 4
BIT
0-3
Figure C-2
00
01
10
11
o
1
o
1
ססOO'
0001'
0010'
0011'
0100'
0101'
0110'
0111'
1000
100,
1010
1011
1100
1101
1110
1111
NORMAL MODE
AUTO
ECHO MODE
LOCAL LOOP MODE
REMOTE
LOOP MODE
Tx RTS DISABLE
Tx RTS DISABLE
NO CTS REQUIRED FOR T.
CTS REQUIRED FOR T.
0563 BIT STOP CHARACTER
0.625 BIT STOP CHARACTER
0688 BIT STOP CHARACTER
0750 BITSTOP CHARACTER
0813 BIT STOP CHARACTER
0.875 BIT STOP CHARACTER
0.938 BIT STOP CHARACTER
1000 BIT STOP CHARACTER
1.563 BIT STOP CHARACTER
1625 BIT STOP CHARACTER
1.6BB BIT STOP CHARACTER
1750 BIT STOP CHARACTER
1813 BIT STOP CHARACTER
1875 BIT STOP CHARACTER
1.938 BIT STOP CHARACTER
2.000 BIT STOP CHARACTER
,
ADO.5 BIT FOR 5 BITS
PER CHARACTER OPERATION
2681 DUART: Mode Register 2
(MR2) (Channel A and B)
C-2