Publication No. 500-9300875565-000 Rev. C.0
Programming 57
flag had previously been cleared. Under normal operating
conditions, this event should not occur and may indicate a
loss of data. This bit is read-only within this register. To clear
this condition, write to the corresponding bit within the Local
Interrupt Status Register.
Bit 00
:
Own Data
– A logic high (1) indicates the board has detected the return of
its own data packet at least once since this bit has previously
been cleared. This bit serves as an indicator that the link is
intact. The Own Data bit should be set any time a write to the
onboard memory occurs or any time network interrupt is
initiated. This bit is both read and write accessible.
3.3.6 Local Interrupt Control Registers
The RFM-5565 contains a number of sources for the interrupt. The second tier of
interrupts is controlled by two registers called the LISR as shown in
Table 3-44
on
page 57 and the LIER shown in
Table 3-45
on page 60. All Local Interrupts are
logically “ORed” together into the single interrupt called the LINTi#. The LINTi#
line is, in turn, controlled by Bit 11 of the Local Configuration register (INTCSR at
offset $68 to Base address 0). The control and status of local interrupts are
implemented in the two local registers (LISR and LIER). The bit functions of these
two registers mirror each other.
Local Interrupt Status Register
Local Interrupt Status Register (LISR) BAR2 (Offset $10): This is a 32-bit register
containing a group of interrupt status flags. The LIER contains a corresponding
group of enables. Before any local interrupt can cause an interrupt on the LINTi#
line, the Status Bit, its Enable and the Global Enable must be asserted.
Table 3-44 Local Interrupt Status Register
LISR: BAR2 Offset $10
Bit 31
Bit 30
Bit 29
Bit 28
Bit 27
Bit 26
Bit 25
Bit 24
Reserved
Bit 23
Bit 22
Bit 21
Bit 20
Bit 19
Bit 18
Bit 17
Bit 16
Reserved
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 09
Bit 08
Auto
Clear
Flag
Global
Interrupt
Enable
Local
Memory
Parity
Error
Memory
Write
Inhibit
Latched
Sync Loss
RX FIFO
Full
RX FIFO
Almost
Full
Bad Data
Bit 07
Bit 06
Bit 05
Bit 04
Bit 03
Bit 02
Bit 01
Bit 00
Pending
Net. Int.
4
Rogue
Packet
Fault
TX FIFO
Full
Reserved Reset
Node
Request
Pending
Net. Int.
3
Pending
Net. Int. 2
Pending
Net. Int. 1
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