PIC16F721-ESS View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F721-ESS

20-Pin Flash Microcontrollers

Microchip Technology 

PIC16(L)F720/721

FIGURE 23-7:

CLKOUT AND I/O TIMING

Cycle

FOSC

CLKOUT

Write

Q4

I/O pin

(Input)

I/O pin

(Output)

Old Value

Fetch

Q1

OS11

OS19

OS13

Read

Q2

OS20

OS21

OS16

OS17

OS15

OS14

OS18, OS19

Execute

Q3

OS12

OS18

New Value

TABLE 23-3: CLKOUT AND I/O TIMING PARAMETERS

Standard Operating Conditions (unless otherwise stated)

Operating Temperature -40°C TA +125°C

Param.

No.

Sym.

Characteristic

Min.

Typ† Max. Units Conditions

OS11* TOSH2CKL FOSC to CLKOUT (1)

—

— 70 ns VDD = 3.3-5.0V

OS12* TOSH2CKH FOSC to CLKOUT (1)

—

— 72 ns VDD = 3.3-5.0V

OS13* TCKL2IOV CLKOUT to Port out valid(1)

—

— 20 ns

OS14* TIOV2CKH Port input valid before CLKOUT(1) TOSC + 200 ns —

—

ns

OS15* TOSH2IOV FOSC (Q1 cycle) to Port out valid

—

50 70* ns VDD = 3.3-5.0V

OS16* TOSH2IOI FOSC (Q2 cycle) to Port input invalid

50

(I/O in hold time)

— — ns VDD = 3.3-5.0V

OS17* TIOV2OSH Port input valid to FOSC(Q2 cycle)

(I/O in setup time)

20

— — ns

OS18* TIOR

Port output rise time

—

15 32 ns VDD = 2.0V

—

40 72

VDD = 3.3-5.0V

OS19* TIOF

Port output fall time

—

28 55 ns VDD = 2.0V

—

15 30

VDD = 3.3-5.0V

OS20* TINP

INT pin input high or low time

25

— — ns

OS21* TRBP

PORTB interrupt-on-change new input

TCY

level time

— — ns

* These parameters are characterized but not tested.

† Data in “Typ” column is at 3.0V, 25C unless otherwise stated.

Note 1: Measurements are taken in EC mode where CLKOUT output is 4 x TOSC.

DS41430D-page 198

 2010-2013 Microchip Technology Inc.

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