Ground; Table 2-3 Grounds - Motorola DSP56309 User Manual

Signal/Connection Descriptions

Ground

Power Name
V (2)
CCS
Note: These designations are package-dependent. Some packages connect all V
each other internally. On those packages, all power input, except V
of connections indicated in this table are minimum values; the total V
package-dependent.
2.3

GROUND

Ground descriptions for the DSP56309 are listed in Table 2-3.
Ground Name
GND
PLL GroundÑGND
P
should be provided with an extremely low-impedance path to ground.
V
close as possible to the chip package. There is one GND
GND PLL Ground 1ÑGND
P1
connection should be provided with an extremely low-impedance path
to ground. There is one GND
GND (4) Quiet GroundÑGND
Q
logic. This connection must be tied externally to all other chip ground
connections. The user must provide adequate external decoupling
capacitors. There are four GND
GND (4) Address Bus GroundÑGND
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. There are four GND
2-6
Table 2-2 Power Inputs (Continued)
ESSI, SCI, and Timer PowerÑV
SCI, and timer I/O drivers. This input must be tied externally to all
other chip power inputs except V
external decoupling capacitors. There are two V

Table 2-3 Grounds

P
should be bypassed to GND
CCP
DSP56309UM/D
Description
is an isolated power for the ESSI,
CCS
. The user must provide adequate
CCQL
Description
is a ground dedicated for PLL use. The connection
by a 0.47 mF capacitor located as
P
is a ground dedicated for PLL use. The
P1
connection.
P1
is an isolated ground for the internal processing
Q
connections.
Q
is an isolated ground for sections of the
A
inputs.
CCS
inputs except V
CC CCP
, are labeled V . The number
CCP CC
connections are
CC
connection.
P
connections.
A
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