CF745 datasheet(77/217 Pages) MICROCHIP

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Preliminary

DS30453B-page 77

PIC16C54/55/56/57

PIC16C5X

FIGURE 11-3: CLKOUT AND I/O TIMING - PIC16C54/55/56/57

TABLE 11-4:

CLKOUT AND I/O TIMING REQUIREMENTS - PIC16C54/55/56/57

AC Characteristics

Standard Operating Conditions (unless otherwise speciﬁed)

Operating Temperature

°C ≤ TA ≤ +70°C (commercial)

–40

°C ≤ TA ≤ +85°C (industrial)

–40

°C ≤ TA ≤ +125°C (extended)

Operating Voltage VDD range is described in Section 11.1, Section 11.2 and

Section 11.3

Parameter

No.

Sym

Characteristic

Min

Typ

(1)

Max

Units

TosH2ckL

OSC1

↑ to CLKOUT↓(2)

—

30**

TosH2ckH

OSC1

↑ to CLKOUT↑(2)

—

30**

TckR

CLKOUT rise time

(2)

—

15**

TckF

CLKOUT fall time

(2)

—

15**

TckL2ioV

CLKOUT

↓ to Port out valid(2)

—

40**

TioV2ckH

Port in valid before CLKOUT

↑(2)

0.25 TCY

+30*

—

TckH2ioI

Port in hold after CLKOUT

↑(2)

—

TosH2ioV

OSC1

↑ (Q1 cycle) to Port out valid(3)

—

100*

TosH2ioI

OSC1

↑ (Q2 cycle) to Port input invalid

(I/O in hold time)

TBD

—

TioV2osH

Port input valid to OSC1

↑

(I/O in setup time)

TBD

—

TioR

Port output rise time

(3)

—

25**

TioF

Port output fall time

(3)

—

25**

These parameters are characterized but not tested.

** These parameters are design targets and are not tested. No characterization data available at this time.

Note 1:

Data in the Typical (“Typ”) column is at 5.0V, 25

°C unless otherwise stated. These parameters are for design guidance

only and are not tested.

Measurements are taken in RC Mode where CLKOUT output is 4 x TOSC.

See Figure 11-1 for loading conditions.

OSC1

CLKOUT

I/O Pin

(input)

I/O Pin

(output)

20, 21

Old Value

New Value

Note: All tests must be done with speciﬁed capacitive loads (see data sheet) 50 pF on I/O pins and CLKOUT.

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