Table 2-3 Grounds; Ground - Motorola DSP56305 User Manual

2.3

GROUND

Ground Name
(# of Pins)
GND PLL Ground—GND
P
should be provided with an extremely low-impedance path to ground.
V
CCP
possible to the chip package.
GND PLL Ground 1—GND
1P
should be provided with an extremely low-impedance path to ground.
GND (4) Quiet Ground—GND
Q
processing logic. This connection must be tied externally to all other chip
ground connections. The user must provide adequate external decoupling
capacitors.
GND (6) Address Bus Ground—GND
A
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.
GND (4) Data Bus Ground—GND
D
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.
GND (2) Bus Control Ground—GND
N
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 two GND
GND (6) Host Ground—GND
H
This connection must be tied externally to all other chip ground
connections. The user must provide adequate external decoupling
capacitors.
GND (2) ESSI, SCI, and Timer Ground—GND
S
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.
Note: These designations are package-dependent. Some packages connect all GND inputs except GND
GND to each other internally. On those packages, all power input, except GND
1P
GND. The number of connections indicated in this table are minimum values; the total GND connections
are package-dependent.
MOTOROLA

Table 2-3 Grounds

is ground dedicated for PLL use. The connection
P
should be bypassed to GND
is ground dedicated for PLL use. The connection
1P
provides isolated ground for the internal
Q
D
provides isolated ground for the HI32 I/O drivers.
H
DSP56305 User's Manual
Signal/Connection Descriptions
Description
by a 0.47 µF capacitor located as close as
P
provides isolated ground for sections of the
A
provides isolated ground for sections of the
provides isolated ground for the bus control
N
connections.
N
provides isolated ground for the
S
Ground
and
P
and GND , are labeled
P 1P
2-7