Reset Driver; Local Bus Interrupter And Interrupt Handler - Motorola MVME1X7P Programmer's Reference Manual

VMEchip2
2

Reset Driver

Local Bus Interrupter and Interrupt Handler

VMEbus ACFAIL interrupter
ABORT
VMEbus SYSFAIL interrupter
Write post bus error
External input
VMEbus IRQ1 edge-sensitive interrupter
VMEchip2 VMEbus interrupter acknowledge
2-18
In addition to the VMEbus timer, the chip contains a local bus timer. This
timer asserts the local TEA when the local bus cycle maintained in its
asserted state for longer that the programmed time-out period. This timer
can be enabled or disabled under software control. The time-out period can
be programmed for 8, 64, or 256 seconds.
The chip includes both a global and a local reset driver. When the chip
operates as the VMEbus system controller, the reset driver provides a
global system reset by asserting the VMEbus signal SYSRESET . A
SYSRESET may be generated by the
watch dog timeout, or by a control bit in the LCSR. SYSRESET remains
asserted for at least 200 msec, as required by the VMEbus specification.
Similarly, the chip provides an input signal and a control bit to initiate a
local reset operation.
The local reset driver is enabled even when the chip is not the system
controller. A local reset may be generated by the
up reset, a watch dog time-out, a VMEbus SYSRESET signal, or a
control bit in the GCSR.
There are 31 interrupt sources in the VMEchip2 ASIC:
switch
switch, a power-up reset, a
RESET
RESET
Tick timer 2-1
DMAC done
GCSR SIG3-0
GCSR location monitor 1-0
Software interrupts 7-0
VMEbus IRQ7-1 interrupts
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switch, a power