PIC16LC621A-04/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LC621A-04/SO

EPROM-Based 8-Bit CMOS Microcontrollers

Microchip Technology 

PIC16C62X

12.9 Timing Diagrams and Specifications

FIGURE 12-12: EXTERNAL CLOCK TIMING

Q4

OSC1

CLKOUT

Q1

Q2

Q3

1

3

3

2

Q4

Q1

4

4

TABLE 12-3: EXTERNAL CLOCK TIMING REQUIREMENTS

Parameter

No.

Sym

Characteristic

Min Typ† Max Units

Conditions

1A

Fosc External CLKIN Frequency(1)

Oscillator Frequency(1)

DC

—

4

MHz XT and RC Osc mode, VDD=5.0V

DC

—

20 MHz HS Osc mode

DC

—

200 kHz LP Osc mode

DC

—

4

MHz RC Osc mode, VDD=5.0V

0.1

—

4

MHz XT Osc mode

1

Tosc External CLKIN Period(1)

Oscillator Period(1)

1

—

20 MHz HS Osc mode

DC

—

200 kHz LP Osc mode

250

—

—

ns XT and RC Osc mode

50

—

—

ns HS Osc mode

5

—

—

µs LP Osc mode

250

—

—

ns RC Osc mode

250

— 10,000 ns XT Osc mode

50

—

1,000 ns HS Osc mode

2

TCY

Instruction Cycle Time(1)

5

—

—

1.0 FOSC/4 DC

µs LP Osc mode

µs TCYS=FOSC/4

3*

TosL, External Clock in (OSC1) High or 100*

—

TosH Low Time

2*

—

—

ns XT oscillator, TOSC L/H duty cycle

—

µs LP oscillator, TOSC L/H duty cycle

20*

—

—

ns HS oscillator, TOSC L/H duty cycle

4*

TosR, External Clock in (OSC1) Rise or

25*

—

—

ns XT oscillator

TosF Fall Time

50*

—

—

ns LP oscillator

2: *

3: †

Note 1:

15*

—

—

ns HS oscillator

These parameters are characterized but not tested.

Data in "Typ" column is at 5.0V, 25°C unless otherwise stated. These parameters are for design guidance only and

are not tested.

Instruction cycle period (TCY) equals four times the input oscillator time-base period. All specified values are based

on characterization data for that particular oscillator type under standard operating conditions with the device

executing code. Exceeding these specified limits may result in an unstable oscillator operation and/or higher than

expected current consumption. All devices are tested to operate at "min." values with an external clock applied to

the OSC1 pin. When an external clock input is used, the "Max." cycle time limit is "DC" (no clock) for all devices.

DS30235J-page 104

 2003 Microchip Technology Inc.

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