Motorola DSP56012 User Manual
Signal Descriptions
Power
MOTOROLA
DSP56012 User’s Manual
2-5
2.2
POWER
Table 2-2
Power Inputs
Power Name
Description
V
CCP
PLL Power
—V
CCP
is V
CC
dedicated for Phase Lock Loop (PLL) use. The voltage
should be well-regulated and the input should be provided with an extremely
low impedance path to the V
low impedance path to the V
CC
power rail. V
CCP
should be bypassed to GND
P
by a 0.1
µ
F capacitor located as close as possible to the chip package.
V
CCQ
Quiet Power—
V
CCQ
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.
provide adequate external decoupling capacitors.
V
CCA
A Power
—V
CCA
is an isolated power for sections of the internal chip logic. This
input must be tied externally to all other chip power inputs. The user must
provide adequate external decoupling capacitors.
provide adequate external decoupling capacitors.
V
CCD
D Power
—V
CCD
is an isolated power for sections of the internal chip logic. This
input must be tied externally to all other chip power inputs. The user must
provide adequate external decoupling capacitors.
provide adequate external decoupling capacitors.
V
CCH
Host Power
—V
CCH
is an isolated power for the HI I/O drivers. This input must
be tied externally to all other chip power inputs. The user must provide adequate
external decoupling capacitors.
external decoupling capacitors.
V
CCS
Serial Host Power
—V
CCS
is an isolated power for the SHI I/O drivers. This
input must be tied externally to all other chip power inputs. The user must
provide adequate external decoupling capacitors.
provide adequate external decoupling capacitors.