8.1.3 Jumper
Setting:
Note:
user should remove R19, R20, R21, R22 and R23 in the 7188XC first.
J1:
I/O expansion bus, connect to J1 of 7188XC
J2:
I/O expansion bus, connect to J2 of 7188XC
J7:
Three channels of 8 DI
TP0:
Original function on 7188XC
TP1:
Five channels of 8 DI
Jumper:
Select
TP0
or
TP1
function
TP0:
J9 and J8 closed
TP1:
J9 and J10 closed
8.1.4 Programming:
DiVal =
inportb(BASE);
/* for all 8-channels */
Note:
1. The default value of BASE is 0.
2. It is
not
recommended to change the value of BASE from 0 to another
value.
3. DiVal=0
all 8-channel are Low
DiVal=1
Chennel_0 is High, the other channels are Low
DiVal=0xff
all 8-channel are High
I/O Expansion Bus for 7188X/7188E User’s Manual, Jan/2005 v1.5, 7PH-000-15---43