Z8F082ASH020SC datasheet(212/244 Pages) ZILOG

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PS024705-0405

P R E L I M I N A R Y

Electrical Characteristics

Z8 Encore! XP® F08xA Series

Product Specification

194

AC Characteristics

The section provides information about the AC characteristics and timing. All AC timing

information assumes a standard load of 50pF on all outputs.

Table 120. AC Characteristics

Symbol

Parameter

VDD = 2.7 to 3.6V

TA = -40°C to +105°C

Units

Conditions

Minimum Maximum

FSYSCLK System Clock Frequency

–

20.0

MHz

Read-only from Flash memory

0.032768

20.0

MHz

Program or erasure of the

Flash memory

FXTAL

Crystal Oscillator Frequency

1.0

20.0

MHz

System clock frequencies

below the crystal oscillator

minimum require an external

clock driver.

FIPO

Internal Precision Oscillator

Frequency

0.032768

5.5296

MHz

Oscillator is not adjustable over

the entire range. User may

select Min or Max value only.

FIPO

Internal Precision Oscillator

Frequency

5.31

5.75

MHz

High speed with trimming

FIPO

Internal Precision Oscillator

Frequency

4.15

6.91

MHz

High speed without trimming

FIPO

Internal Precision Oscillator

Frequency

30.7

33.3

KHz

Low speed with trimming

FIPO

Internal Precision Oscillator

Frequency

KHz

Low speed without trimming

TXIN

System Clock Period

–

TCLK = 1/Fsysclk

TXINH

System Clock High Time

TCLK = 50ns

TXINL

System Clock Low Time

TCLK = 50ns

TXINR

System Clock Rise Time

–

TCLK = 50ns

TXINF

System Clock Fall Time

–

TCLK = 50ns

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