PIC16C73B-20E/SO 查看數據表（PDF） - Microchip Technology

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PIC16C73B-20E/SO

8-Bit CMOS Microcontrollers with A/D Converter

Microchip Technology 

PIC16C63A/65B/73B/74B

16.2.3 TIMING DIAGRAMS AND SPECIFICATIONS

FIGURE 16-5:

EXTERNAL CLOCK TIMING

Q4

Q1

Q2

Q3

OSC1

CLKOUT

1

3

3

2

Q4

Q1

4

4

TABLE 16-2: EXTERNAL CLOCK TIMING REQUIREMENTS

Param

No.

Sym

Characteristic

Min Typ† Max Units

Conditions

1A FOSC External CLKIN Frequency

(Note 1)

DC —

DC —

4 MHz RC and XT osc modes

4 MHz HS osc mode (-04)

DC —

20 MHz HS osc mode (-20)

DC —

200 kHz LP osc mode

Oscillator Frequency

(Note 1)

DC —

0.1 —

4 MHz RC osc mode

4 MHz XT osc mode

4

—

20 MHz HS osc mode

5

—

200 kHz LP osc mode

1

TOSC External CLKIN Period

(Note 1)

250 —

250 —

—

ns RC and XT osc modes

—

ns HS osc mode (-04)

50 —

—

ns HS osc mode (-20)

5

—

—

µs LP osc mode

Oscillator Period

(Note 1)

250 —

—

ns RC osc mode

250 — 10,000 ns XT osc mode

250 —

250 ns HS osc mode (-04)

50 —

250 ns HS osc mode (-20)

5

—

—

µs LP osc mode

2

TCY Instruction Cycle Time (Note 1) 200 —

DC

ns TCY = 4/FOSC

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

TosH Low Time

2.5 —

—

ns XT oscillator

—

µs LP oscillator

15 —

—

ns HS oscillator

4* TosR, External Clock in (OSC1) Rise or — —

TosF Fall Time

——

25

ns XT oscillator

50

ns LP oscillator

——

15

ns HS oscillator

* These parameters are characterized but not tested.

† Data in “Typ” column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance only and

are not tested.

Note 1: 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/CLKIN pin. When an external clock input is used, the “Max.” cycle time limit is

“DC” (no clock) for all devices.

DS30605C-page 124

 2000 Microchip Technology Inc.

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