DSP56307SLASHD datasheet(10/156 Pages) MOTOROLA

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DSP56307 Technical Data

MOTOROLA

Signals/Connections

Ground

GROUND

Table 1-3

Grounds

Ground

Name

Description

GNDP

PLL Ground

ÑGNDP is ground-dedicated for PLL use. The connection should be

provided with an extremely low-impedance path to ground. VCCP should be

bypassed to GNDP by a 0.47 µF capacitor located as close as possible to the chip

package.

GNDP1

PLL Ground 1

ÑGNDP1 is ground-dedicated for PLL use. The connection should be

provided with an extremely low-impedance path to ground.

GNDQ

Quiet Ground

ÑGNDQ is an isolated ground for the internal processing logic. This

connection must be tied externally to all other chip ground connections. The user

must provide adequate external decoupling capacitors.

GNDA

Address Bus Ground

ÑGNDA is an isolated ground for sections of the address bus

I/O drivers. This connection must be tied externally to all other chip ground

connections. The user must provide adequate external decoupling capacitors. There

are four GNDA connections.

GNDD

Data Bus Ground

ÑGNDD is an isolated ground for sections of the data bus I/O

drivers. This connection must be tied externally to all other chip ground

connections. The user must provide adequate external decoupling capacitors.

GNDC

Bus Control Ground

ÑGNDC is an isolated ground for the bus control I/O drivers.

This connection must be tied externally to all other chip ground connections. The

user must provide adequate external decoupling capacitors.

GNDH

Host Ground

ÑGNDH is an isolated ground for the HI08 I/O drivers. This

connection must be tied externally to all other chip ground connections. The user

must provide adequate external decoupling capacitors.

GNDS

ESSI, SCI, and Timer Ground

ÑGNDS is an isolated ground for the ESSI, SCI, and

timer I/O drivers. This connection must be tied externally to all other chip ground

connections. The user must provide adequate external decoupling capacitors.

Not Recommended for New Design

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