W78LE812(2006) Просмотр технического описания (PDF) - Winbond

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W78LE812
(Rev.:2006)

8-BIT MICROCONTROLLER

Winbond 

W78LE812/W78L812A

9. AC CHARACTERISTICS

The AC specifications are a function of the particular process used to manufacture the part, the ratings

of the I/O buffers, the capacitive load, and the internal routing capacitance. Most of the specifications

can be expressed in terms of multiple input clock periods (TCP), and actual parts will usually

experience less than a ±20 nS variation. The numbers below represent the performance expected

from a 0.6micron CMOS process when using 2 and 4 mA output buffers.

9.1 Clock Input Waveform

XTAL1

TCH

TCL

F OP, TCP

PARAMETER

Operating Speed

Clock Period

Clock High

Clock Low

SYMBOL

FOP

TCP

TCH

TCL

MIN.

0

50

25

25

Notes:

1. The clock may be stopped indefinitely in either state.

2. The TCP specification is used as a reference in other specifications.

3. There are no duty cycle requirements on the XTAL1 input.

TYP.

-

-

-

-

MAX.

20

-

-

-

UNIT

MHz

nS

nS

nS

NOTES

1

2

3

3

- 21 -

Publication Release Date: November 6, 2006

Revision A9

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