DSPIC30F2010 datasheet(169/202 Pages) MICROCHIP

169 / 202 page

DS70118J-page 169

dsPIC30F2010

FIGURE 22-14:

QEA/QEB INPUT CHARACTERISTICS

TABLE 22-30: QUADRATURE DECODER TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.5V to 5.5V

(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 2)

TQ41

TQUFH

Filter Time to Recognize High,

with Digital Filter

3 * N * TCY

—

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

128 and 256 (Note 2)

Note 1:

These parameters are characterized but not tested in manufacturing.

N = Index Channel Digital Filter Clock Divide Select Bits. Refer to Section 16. “Quadrature Encoder

Interface (QEI)” (DS70063) in the “dsPIC30F Family Reference Manual” (DS70046).

TQ30

TQ35

TQ31

QEA

(input)

TQ30

TQ35

TQ31

QEB

(input)

TQ36

QEB

Internal

TQ40

TQ41

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