Local Bus Interrupter And Interrupt Handler - Motorola MVME162FX Programmer's Reference Manual

VMEchip2

Local Bus Interrupter and Interrupt Handler

2
2-20
There are 31 interrupt sources in the VMEchip2: VMEbus ACFAIL,
switch, VMEbus SYSFAIL, write post bus error, external
ABORT
input, VMEbus IRQ1 edge-sensitive, VMEchip2 VMEbus
interrupter acknowledge, tick timer 2-1, DMAC done, GCSR SIG3-
0, GCSR location monitor 1-0, software interrupts 7-0, and VMEbus
IRQ7-1. Each of the 31 interrupts can be enabled to generate a local
bus interrupt at any level. For example, VMEbus IRQ5 can be
programmed to generate a level 2 local bus interrupt.
The VMEbus AC fail interrupter is an edge-sensitive interrupter
connected to the VMEbus ACFAIL signal line. This interrupter is
filtered to remove the ACFAIL glitch which is related to the BBSY
glitch.
The SYS fail interrupter is an edge-sensitive interrupter connected
to the VMEbus SYSFAIL signal line.
The write post bus error interrupter is an edge-sensitive interrupter
connected to the local bus to VMEbus write post bus error signal
line.
The VMEbus IRQ1 edge-sensitive interrupter is an edge-sensitive
interrupter connected to the VMEbus IRQ1 signal line. This
interrupter is used when one of the tick timers is connected to the
IRQ1 signal line. When this interrupt is acknowledged, the vector is
provided by the VMEchip2 and a VMEbus interrupt acknowledge
is not generated. When this interrupt is enabled, the VMEbus IRQ1
level-sensitive interrupter should be disabled.
The VMEchip2 VMEbus interrupter acknowledge interrupter is an
edge-sensitive interrupter connected to the acknowledge output of
the VMEbus interrupter. An interrupt is generated when an
interrupt on the VMEbus from VMEchip2 is acknowledged by a
VMEbus interrupt handler.
The tick timer interrupters are edge-sensitive interrupters
connected to the output of the tick timers.