dsp56000 Freescale Semiconductor, Inc, dsp56000 Datasheet - Page 180

• Manufacturer Part Number: dsp56000
• Description: 24-bit Digital Signal Processor Family Manual
• Manufacturer: Freescale Semiconductor, Inc

9.2.1
The Phase Detector (PD) detects any phase difference between the external clock
(EXTAL) and an internal clock phase from the frequency multiplier. At the point where
there is negligible phase difference and the frequency of the two inputs is identical, the
PLL is in the “locked” state.
9 - 4
56K Mod-
Phase Detector and Charge Pump Loop Filter
GENERATOR
INTERNAL
24-Bit
SWITCH
CLOCK
PLL
DATA
BUS
PERIPHERAL
MODULES
CONTROLLER
INTERRUPT
PROGRAM
GENERATION
Freescale Semiconductor, Inc.
MODC/NMI
MODB/IRQB
MODA/IRQA
RESET
ADDRESS
Figure 9-2 DSP56K Block Diagram
For More Information On This Product,
CONTROLLER
UNIT
PROGRAM
DECODE
Program Control Unit
PLL CLOCK OSCILLATOR
Go to: www.freescale.com
PLL COMPONENTS
EXPANSION
GENERA TOR
PROGRAM
RAM/ROM
PROGRAM
ADDRESS
YAB
XAB
PAB
YDB
XDB
PDB
GDB
TWO 56-BIT ACCUMULATORS
EXPANSION
X MEMORY
24X24 + 56 56-BIT MAC
RAM/ROM
DATA ALU
EXPANSION
Y MEMORY
RAM/ROM
EXPANSION
EXTERNAL
EXTERNAL
ADDRESS
DATA BUS
CONTROL
SWITCH
SWITCH
OnCE™
BUS
BUS
16 BITS
24 BITS
AREA
MOTOROLA