DSP56366 datasheet(7/110 Pages) FREESCALE

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DSP56366 Technical Data, Rev. 3.1

Freescale Semiconductor

2-3

2.2

Power

2.3

Ground

Table 2-2 Power Inputs

Power Name

Description

VCCP

PLL Power—VCCP is 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. There is one VCCP input.

VCCQL (4)

Quiet Core (Low) Power—VCCQL is an isolated power for the internal processing logic. This input must

be tied externally to all other chip power inputs. The user must provide adequate external decoupling

capacitors. There are four VCCQL inputs.

VCCQH (3)

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

externally to all other chip power inputs. The user must provide adequate decoupling capacitors. There are

three VCCQH inputs.

VCCA (3)

Address Bus Power—VCCA is an isolated power for sections of the address bus I/O drivers. This input

must be tied externally to all other chip power inputs. The user must provide adequate external decoupling

capacitors. There are three VCCA inputs.

VCCD (4)

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

tied externally to all other chip power inputs. The user must provide adequate external decoupling

capacitors. There are four VCCD inputs.

VCCC (2)

Bus Control Power—VCCC is an isolated power for the bus control I/O drivers. This input must be tied

externally to all other chip power inputs. The user must provide adequate external decoupling capacitors.

There are two VCCC inputs.

VCCH

Host Power—VCCH is an isolated power for the HDI08 I/O drivers. This input must be tied externally to all

other chip power inputs. The user must provide adequate external decoupling capacitors. There is one

VCCH input.

VCCS (2)

SHI, ESAI, ESAI_1, DAX and Timer Power —VCCS is an isolated power for the SHI, ESAI, ESAI_1, DAX

and Timer. This input must be tied externally to all other chip power inputs. The user must provide

adequate external decoupling capacitors. There are two VCCS inputs.

Table 2-3 Grounds

Ground Name

Description

GNDP

PLL Ground—GNDP is a 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. There is one GNDP connection.

GNDQ (4)

Quiet Ground—GNDQ 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. There are four GNDQ connections.

GNDA (4)

Address Bus Ground—GNDA 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.

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