DSP56F805FV80 Freescale Semiconductor, DSP56F805FV80 Datasheet - Page 30

• Manufacturer Part Number: DSP56F805FV80
• Description: IC DSP 80MHZ 31.5K FLASH 144LQFP
• Manufacturer: Freescale Semiconductor
• Series: 56F8xxr

Specifications of DSP56F805FV80

• Core Processor: 56800
• Core Size: 16-Bit
• Speed: 80MHz
• Connectivity: CAN, EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 32
• 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: 144-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

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.
30
Frequency of operation (external clock driver)
Clock Pulse Width
1. See
2. The high or low pulse width must be no smaller than 6.25ns or the chip will not function. However, the high pulse width
does not have to be any particular percent of the low pulse width.
3. Parameters listed are guaranteed by design.
External
Note: The midpoint is V
Clock
External Clock Source
Figure 3-9
Operating Conditions:
Table 3-8 External Clock Operation Timing Requirements
Characteristic
2
for details on using the recommended connection of an external clock driver.
10%
,
50%
90%
5
Figure 3-9 Connecting an External Clock Signal
t
PW
IL
+ (V
Figure 3-10 External Clock Timing
IH
– V
IL
56F805 Technical Data, Rev. 16
V
)/2.
SS
= V
t
1
PW
External
XTAL
Clock
SSA
= 0 V, V
f
t
56F805
Symbol
osc
PW
EXTAL
DD
V
SS
= V
DDA
6.25
Min
0
= 3.0–3.6V, T
Typ
Figure
—
—
A
= –40° to +85°C
3-9. The external clock
Max
Freescale Semiconductor
80
—
3
10%
50%
90%
MHz
V
V
Unit
ns
IH
IL