Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

Operating Instructions

FIGURE 4-3 DIP-Switch 64/32 Bit Setting

SW5SW6

32

BIT

64

4•2•6 HARD RESET (HRESET) - Switch - SW7

HARD reset is generated when switch SW7 is pressed. When the Processor executes HARD reset sequence, all its configuration is lost, including data stored in the SDRAMs and the Processor has to be re-initialized.

4•2•7 Power-On RESET Switch (PRESET) - SW8

The Power-On reset switch SW8 performs Power-On reset to the MSC8101, as if the power was re-applied to the ADS. When the Processor is reset that way, all configuration and all data residing in volatile memories are lost. After PORST~ signal is negated, the Processor re-acquires the power-on reset configuration data from the Flash (Altera) or Host I/F.

4•2•8 Configuration Switch - SW9

SW9 is a 8-switch DIP-Switch. This switch is connected over Altera device to MODCK(1:6) lines of the Processor. The combination of the switches composing SW9, sets, during Power-On reset sequence, the MODCK(1:6) field for the MSC8101. The switch SW9/7 establishes Configuration Word Source. If SW9/7 is set to ON position Configuration Word will be loaded from the Flash, oth- erwise from Altera device (default). The Host Configuration will be chosen with SW9/8 set ON, when SW9/8 is OFF - PPC bus has 64-bit width.

The Switch SW9 is factory set to (1 - OFF, 2 - ON, 3 - OFF, 4 - OFF (X), 5 - ON, 6 - OFF, 7,8 - OFF).

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MSC8101ADS RevB User’s Manual

MOTOROLA

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Nortel Networks MSC8101 ADS Hard Reset Hreset Switch SW7, Power-On Reset Switch Preset SW8, Configuration Switch SW9