Motorola MVME2400 Series Manuel de service Page 86

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4-8 Computer Group Literature Center Web Site
Programming the MVME240x
4
DMA Channels
The PIB supports seven DMA channels. They are not functional on the
MVME240x.
Sources of Reset
The MVME240x has nine potential sources of reset:
1. Power-on reset
2.
RST switch (resets the VMEbus when the MVME240x is system
controller)
3. Watchdog timer Reset function controlled by the SGS-Thomson
MK48T559 timekeeper device (resets the VMEbus when the
MVME240x is system controller)
4.
ALT_RST function controlled by the Port 92 register in the PIB
(resets the VMEbus when the MVME240x is system controller)
5. PCI/ISA I/O Reset function controlled by the Clock Divisor register
in the PIB
6. The VMEbus
SYSRESET signal
Hawk MPIC
PMC Slot 1
INTA# INTB# INTC#
INTD#
PMC Slot 2
INTA# INTB# INTC#
INTD#
PCIX Slot
INTA#
INTB# INTC#
INTD#
IRQ9
IRQ10
IRQ11 IRQ12
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