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TVME8300 User Manual Issue 1.4
Page 53 of 70
8.3 IP
Interrupts
The IP FPGA maps all IP interface interrupt sources (Timeout, Error, INT0, INT1) to the PCI9030 local
interrupt input 1 (LINT1#). The PCI9030 local interrupt 2 (LINT2#) is reserved.
The PCI9030 PCI Target Chip maps its local interrupt inputs to its PCI interrupt output (INTA#).
The PCI9030 PCI interrupt output is mapped to the serial interrupt no. 4 of the MPC8245 PIC.
Upon detecting MPC8245 PIC Serial Interrupt No. 4, read the IP Status Register (PCI9030 Local
Space 0) to determine the IP interrupt source.
Timeout interrupts and edge sensitive IP interrupts must be cleared in the IP Status Register.
For using Error interrupts it is assumed that the IP module holds the asserted ERROR# signal level
and provides an acknowledge mechanism by register access to clear the error signal assertion. If the
IP module does not hold the asserted ERROR# signal level, there is a possibility of spurious
interrupts. If the IP module does hold the asserted ERROR# signal level, but does not provide an
acknowledge mechanism, the ERROR# interrupt should be disabled when entered for the first time.