![background image](http://html1.mh-extra.com/html/ibase-technology/mb991/mb991_user-manual_3295701030.webp)
22
MB991AF
User’s Manual
2.5.4
COM7 ~ COM10 Ports (J7, J8)
J7
: (for COM7 & COM8)
J8
: (for COM9 & COM10)
1
2
19
20
Pin
Assigment
Pin
Assigment
1
DCD#_A
2
DSR#_A
3
SIN#_A
4
RTS#_A
5
SOUT_A
6
CTS#_A
7
DTR#_A
8
RI#_A
9
GND
10
N/C
11
DCD#_B
12
DSR#_B
13
SIN#_B
14
RTS#_B
15
SOUT_B
16
CTS#_B
17
DTR#_B
18
RI#_B
19
GND
20
N/C