DSP56301PW80B1 Freescale Semiconductor, DSP56301PW80B1 Datasheet - Page 31

• Manufacturer Part Number: DSP56301PW80B1
• Manufacturer: Freescale Semiconductor

Specifications of DSP56301PW80B1

• Device Core Size: 24b
• Format: Fixed Point
• Clock Freq (max): 80MHz
• Mips: 80
• Device Input Clock Speed: 80MHz
• Ram Size: 24KB
• Program Memory Size: Not RequiredKB
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: -40C to 100C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 208
• Package Type: TQFP
• Lead Free Status / Rohs Status: Not Compliant

2.5.2
The DSP56301 system clock is derived from the on-chip oscillator or it is externally supplied. To use the on-chip
oscillator, connect a crystal and associated resistor/capacitor components to EXTAL and XTAL; examples are
shown in Figure 2-1.
If an externally supplied square wave voltage source is used, disable the internal oscillator circuit during boot-up
by setting XTLD (PCTL Register bit 16 = 1—see the DSP56301 User’s Manual). The external square wave source
connects to
between the
Freescale Semiconductor
CLKOUT with
CLKOUT with
PLL disabled
C
PLL enabled
EXTAL
EXTAL
External Clock Operation
EXTAL
EXTAL
Fundamental Frequency
Crystal Oscillator
;
XTAL1
6a
XTAL
input and the internal clock and
V
ILX
R
is not physically connected to the board or socket. Figure 2-2 shows the relationship
ET
XTAL
H
C
2
5
Note: Make sure that in
the PCTL Register:
•
•
Figure 2-1.
4
Figure 2-2.
XTLD (bit 16) = 0
If f
ET
DSP56301 Technical Data, Rev. 10
XTLR (bit 15) = 0
OSC
L
> 200 kHz,
3
ET
6b
C
Crystal Oscillator Circuits
CLKOUT
External Clock Timing
.
Suggested Component Values:
f
R = 680 kΩ ± 10%
C = 56 pF ± 20%
Calculations were done for a 4/20 MHz crystal
with the following parameters:
•
•
•
•
OSC
C
C
series resistance of 100/20 Ω, and
drive level of 2 mW.
L
0
= 4 MHz
of 30/20 pF,
of 7/6 pF,
7
Midpoint
7
Note:
5
f
R = 680 kΩ ± 10%
C = 22 pF ± 20%
OSC
The midpoint is
0.5 (V
= 20 MHz
IHX
AC Electrical Characteristics
V
+ V
IHX
ILX
).
2-5