DSP56311UM View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

DSP56311UM

24-Bit Digital Signal Processor

Motorola => Freescale 

Power

1.2 Power

Table 1-2. Power Inputs

Power Name

Description

VCCP

VCCQL

PLL Power—VCC dedicated for PLL use. The voltage should be well-regulated and the input

should be provided with an extremely low impedance path to the VCC power rail.

Quiet Core (Low) Power—An isolated power for the core processing logic. This input must

be isolated externally from all other chip power inputs.

VCCQH

Quiet External (High) Power—A quiet power source for I/O lines. This input must be tied

externally to all other chip power inputs, except VCCQL.

VCCA

Address Bus Power—An isolated power for sections of the address bus I/O drivers. This

input must be tied externally to all other chip power inputs, except VCCQL.

VCCD

Data Bus Power—An isolated power for sections of the data bus I/O drivers. This input must

be tied externally to all other chip power inputs, except VCCQL.

VCCC

Bus Control Power—An isolated power for the bus control I/O drivers. This input must be

tied externally to all other chip power inputs, except VCCQL.

VCCH

Host Power—An isolated power for the HI08 I/O drivers. This input must be tied externally to

all other chip power inputs, except VCCQL.

VCCS

ESSI, SCI, and Timer Power—An isolated power for the ESSI, SCI, and timer I/O drivers.

This input must be tied externally to all other chip power inputs, except VCCQL.

Note: The user must provide adequate external decoupling capacitors for all power connections.

1.3 Ground

Table 1-3. Grounds

Ground

Name

Description

GNDP

PLL Ground—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—Ground-dedicated for PLL use. The connection should be provided with an extremely

low-impedance path to ground.

GND

Ground—Connected to an internal device ground plane.

Note: The user must provide adequate external decoupling capacitors for all GND connections.

1-3

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