DSPIC33FJMC202ESS datasheet(256/330 Pages) MICROCHIP

256 / 330 page

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

DS70283K-page 256

FIGURE 24-12:

QEA/QEB INPUT CHARACTERISTICS

TQ30

TQ35

TQ31

QEA

(input)

TQ30

TQ35

TQ31

QEB

(input)

TQ36

QEB

Internal

TQ40

TQ41

TABLE 24-30: QUADRATURE DECODER TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature

-40°C

≤TA ≤+85°C for Industrial

-40°C

≤TA ≤+125°C for Extended

Param

No.

Symbol

Characteristic(1)

Typ(2)

Max

Units

Conditions

TQ30

TQUL

Quadrature Input Low Time

6 TCY

—ns

—

TQ31

TQUH

Quadrature Input High Time

6 TCY

—ns

—

TQ35

TQUIN

Quadrature Input Period

12 TCY

—ns

—

TQ36

TQUP

Quadrature Phase Period

3 TCY

—ns

—

TQ40

TQUFL

Filter Time to Recognize Low,

with Digital Filter

3 * N * TCY

—

N = 1, 2, 4, 16, 32, 64,

128 and 256 (Note 3)

TQ41

TQUFH

Filter Time to Recognize High,

with Digital Filter

3 * N * TCY

—

N = 1, 2, 4, 16, 32, 64,

128 and 256 (Note 3)

Note 1: These parameters are characterized but not tested in manufacturing.

2: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only

and are not tested.

3: N = Index Channel Digital Filter Clock Divide Select bits. Refer to Section 15. “Quadrature Encoder

Interface (QEI)” (DS70208) in the “dsPIC33F/PIC24H Family Reference Manual”. Please see the

Microchip web site for the latest dsPIC33F/PIC24H Family Reference Manual sections.

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