DSP56F803BU80 Freescale Semiconductor, DSP56F803BU80 Datasheet - Page 28

• Manufacturer Part Number: DSP56F803BU80
• Description: IC DSP 80MHZ 31.5K FLASH 100LQFP
• Manufacturer: Freescale Semiconductor
• Series: 56F8xxr

Specifications of DSP56F803BU80

• Core Processor: 56800
• Core Size: 16-Bit
• Speed: 80MHz
• Connectivity: CAN, EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Size: 71KB (35.5K x 16)
• Program Memory Type: FLASH
• Ram Size: 2.5K x 16
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

28
3.5.2
It is also possible to drive the internal oscillator with a ceramic resonator, assuming the overall system
design can tolerate the reduced signal integrity. In
shown. Refer to supplier’s recommendations when selecting a ceramic resonator and associated
components. The resonator and components should be mounted as close as possible to the EXTAL and
XTAL pins. The internal 56F80x oscillator circuitry is designed to have no external load capacitors
present. As shown in
3.5.3
The recommended method of connecting an external clock is given in
source is connected to XTAL and the EXTAL pin is grounded.
Note: Freescale recommends only two terminal ceramic resonators vs. three terminal resonators
(which contain an internal bypass capacitor to ground).
Ceramic Resonator
External Clock Source
Figure 3-7
Figure 3-9 Connecting an External Clock Signal
Figure 3-8 Connecting a Ceramic Resonator
EXTAL XTAL
no external load capacitors should be used.
R
f
c
z
56F803 Technical Data, Rev. 16
Recommended Ceramic Resonator
Parameters:
R
f
c
External
z
= 8MHz (optimized for 8MHz)
XTAL
Clock
= 1 to 3 MΩ
56F803
Figure
EXTAL
V
SS
3-8, a typical ceramic resonator circuit is
Figure
3-9. The external clock
Freescale Semiconductor