56F803 datasheet(34/57 Pages) FREESCALE

Part #	56F803

Description	16-bit Digital Signal Controllers

PDF	57 Pages

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

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External Clock Operation

56F803 Technical Data, Rev. 16

Freescale Semiconductor

Figure 3-10 External Clock Timing

Table 3-8 External Clock Operation Timing Requirements3

Operating Conditions: V

SS = VSSA = 0 V, VDD = VDDA = 3.0–3.6 V, TA = –40° to +85°C

Characteristic

Symbol

Min

Typ

Max

Unit

Frequency of operation (external clock driver)1

See Figure 3-9 for details on using the recommended connection of an external clock driver.

fosc

0—

MHz

Clock Pulse Width2, 3

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.

Parameters listed are guaranteed by design.

tPW

6.25

—

External

Clock

VIH

VIL

Note: The midpoint is VIL + (VIH – VIL)/2.

90%

50%

10%

90%

50%

10%

tPW

56F803 Datasheet(PDF) 34 Page - Freescale Semiconductor, Inc