AP513 ACROPACK
USER
’S MANUAL
Acromag, Inc. Tel: 248-295-0310
- 33 -
http://www.acromag.com
- 33 -
www.acromag.com
When software flow control in enabled, and one or two
sequential receive data characters match the
preprogrammed Xoff 1-2 values an interrupt will be issued.
6
1
RTS# Output Interrupt Enable:
0 = Disable RTS# interrupt (default).
1 = Enable RTS# interrupt.
This Interrupt is generated when the RTS pin transitions
from a logic 0 to a logic 1.
7
1
CTS# Input Interrupt Enable:
0 = Disable CTS# interrupt (default).
1 = Enable CTS# interrupt.
This interrupt will be issued when the CTS pin transitions
from a logic 0 to a logic 1.
1
Bits 5-7
are only programmable when the EFR bit 4 is set to “1”.
3.4.5 Interrupt Status Register (ISR)
–
Read Only
The Interrupt Status Register is used to indicate that a prioritized interrupt is
pending and the type of interrupt that is pending. Six levels of prioritized
interrupts are provided to minimize software interaction. Performing a read
cycle on the ISR will provide the user with the highest pending interrupt
level to be serviced. No other interrupts are acknowledged until the
pending interrupt is serviced. Whenever the interrupt status register is
read, the interrupt status is cleared. Note, only the current pending
interrupt is cleared by the read. A lower level interrupt may be seen after
re-reading the interrupt status bits.
The following interrupt source table shows the data values (bit 0-5) for the
six prioritized interrupt levels and the interrupt sources associated with each
of these interrupts.