W78C32C/W78C032C

Publication Release Date: December 4, 2006

- 9 -

Revision A6

DC Characteristics, continued

PARAMETER

SYM.

TEST CONDITIONS

SPECIFICATION

UNIT

MIN.

TYP.

MAX.

Input Low Voltage

XTAL1, RST

(*3)

0

-

0.8

V

Input High Voltage

P1, P3

2.4

-

+0.2

V

Input High Voltage

XTAL1, RST

(*3)

3.5

-

+0.2

V

Notes:

1. P0 and P2 are in external access mode.

2. RST pin has an internal pull-down resistor of about 30K

Ω.

3. XTAL1 is a CMOS input and RST is a Schmitt trigger input.

6.3

A.C. 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

experience less than a

±20 nS variation. The numbers below represent the performance expected

from a 0.5 micron CMOS process when using 2 and 4 mA output buffers.

6.3.1

Clock Input Waveform

T

T

XTAL1

F

CH

CL

PARAMETER

SYMBOL

MIN.

TYP.

MAX.

UNIT

NOTES

Operating Speed

0

-

40

MHz

1

Clock Period

25

-

-

nS

2

Clock High

10

-

-

nS

3

Clock Low

10

-

-

nS

3

Notes:

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

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