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Dma channels, Sources of reset, Dma channels -8 sources of reset -8 – Motorola MVME2400 User Manual

Page 86: 4dma channels

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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