4.3.2 INT_CHAN_0/1
INT0/1
Inverted/Noninverted
select
(INV0/1)
Enable/Disable select
(EN0/1)
INT_CHAN_0/1
The INT_CHAN_0 and INT_CHAN_1 architecture is shown in the above
figure. The only difference between INT0 and INT1 is that the INT_CHAN_0
signal source comes from the UART 0 interrupt output, and the INT_CHAN_1
signal source comes from the UART 1 interrupt output.
INT_CHAN_0/1 must be fixed in a low level state normally and should
generate a high_pulse when sending an interrupt signal to the PC.
The EN0/1 can be used to enable/disable the INT_CHAN_0/1 as follows:
(Refer to Sec.4.2.4) (Note:
VXC-112A using EN2/3
.)
EN0/1 = 0
→
INT_CHAN_0/1 = disabled
EN0/1 = 1
→
INT_CHAN_0/1 = enabled
INV0/1 can be used to invert/non-invert the INT0/1 as follows:
(Refer to Sec.4.2.6) (Note:
VXC-112A using INV2/3
.)
INV0/1 = 0
→
INT_CHAN_0/1 = inverted state of INT0/1
INV0/1 = 1
→
INT_CHAN_0/1 = non-inverted state of INT0/1
As mentioned above
,
if INT\ is fixed in a low level state, the VXC card
will continuously send interrupt signals to the PC. The interrupt service
routine should use INV0/1 to invert/non-invert INT0/1 and so generate a
high_pulse.
(Note: VXC-112A using INV2/3.)
VXC Cards User’s Manual (Ver. 1.1, 06/09.2005, pmh-012-01) -----40
