User`s manual

Chapter 3 Function Description 27
c) Finally, enable the pattern match function for port A0 of the PCI-
1753 by writing a “1” in bit 0 of Base+16.
d) When the input signals at channels PA01, PA02 and PA07 are high
and PA06 is low, an interrupt signal will be generated. This result is
not affected by the states of channels PA00, PA03, PA04 and PA05.
3.3.8 Change of State Interrupt Function
The PCI-1753/1753E also provides the change of state interrupt
function for port B0. It monitors the status of the enabled channels of
port B0, which are chosen in Base+28 (or Base+60 for the PCI-
1753E). When one of the enabled channels changes its state, the PCI-
1753 delivers an interrupt signal to the system to handle this event.
The following is an example.
Example 4.2 Assume that the change of state interrupt function for
the I/O channels PB01, PB02, PB06 and PB07 on the PCI-1753E are
enabled (i.e. the signals in PB00, PB03, PB04 and PB05 on the PCI-
1753E and port B0 of the PCI-1753 are ignored during the change of
state process). When a change of state occurs in either PB01 or PB02
or PB06 or PB07, an interrupt signal will be delivered to the system.
a) First, enable the change of state interrupt function for PB01, PB02,
PB06 and PB07 of the PCI-1753E.
Bit # 76543210
Base+60 11000110
M1 Description
1 Enable the pattern match interrupt function for port A0
0 Disable the pattern match interrupt function for port A0