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2.10
Se rial In ter face
The EBC-LP pro vides four 16550 com pati ble RS- 232 se rial ports at the fol low ing ad dresses :
COM1 3F8H
at IRQ 4
COM2 2F8H
at IRQ 3
COM3 3E8H*
at IRQ 5**
COM4 2E8H*
at IRQ 9**
*COM ports 3 and 4 can be en abled or dis abled in di vidu ally via the jumper block at J21. When J 21
pins 1-2 are jumpered, COM3 is en abled. When J21 pins 3-4 are jumpered, COM4 is en abled.
**The in ter rupts are not dis con nected when COM3 or COM4 are dis abled. Use the in ter rupt
rout ing block J17 de scribed ear lier to dis con nect the de fault in ter rupts if de sired.
Page 2-6
WinSystems - "The Embedded Authority"
(PnP Device)
(PnP Device)
EBC-LP OPERATIONS MANUAL
U26
U25
1 o
o o o
J11
2 o
3 2 1
3 o
U28
U29
1 o
o o o
J13
2 o
3 2 1
3 o
J21
3 o o 1
4 o o 2
U24
J12
U30
J14
030530
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