Nortel Networks MSC8101 ADS user manual Abort Switch SW3, Soft Reset Sreset Switch SW4

Models: MSC8101 ADS

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Freescale Semiconductor, Inc.

Operating Instructions

FIGURE 4-2 Switch SW2 - Description

Inc.

RESERVED

EED

EE5

EE4

EE3

EE2

EE1

EE0

Set to ‘0’ <=

ON

SW2

8

7

6

5

4

3

2

1

=> Set to ’1’

Freescale Semiconductor,

4•2•3 ABORT Switch - SW3

The ABORT switch is normally used to abort program execution, this by issuing a level 0 non- maskable interrupt to the Processor. If the ADS is in stand alone mode, it is the responsibility of the user to provide means of handling the interrupt, since there is no resident debugger with the MSC8101-ADS. The ABORT switch signal is denounced, and can not be disabled by software.

4•2•4 SOFT RESET (SRESET) Switch - SW4

The SOFT reset switch SW4 performs Soft Reset to the Processor internal modules, maintaining it’s configuration (clocks & chip-selects) and SDRAMs’ contents. The switch signal is debounced, and it is not possible to disable it by software.

4•2•5 DATA Bus Width Setting - SW5 & SW6.

Two switches SW5 & SW6 are using together for preparing the SDRAM Memory Banks for Host Interface Mode when HDI16 interface is provided over Data Bus lines D32-D63. They should be set in “32bit” position when DIP-Switch SW9/8 HOST CFG set ON (PPC bus supports Host I/F) and vice versa - “64bit” when Host I/F disable.

MOTOROLA

MSC8101ADS RevB User’s Manual

27

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Nortel Networks MSC8101 ADS user manual Abort Switch SW3, Soft Reset Sreset Switch SW4, Data Bus Width Setting SW5 & SW6