DSPIC30F0010AT-20ESLASHS datasheet(200/236 Pages) MICROCHIP

200 / 236 page

dsPIC30F6010A/6015

DS70150C-page 198

FIGURE 24-14:

QEA/QEB INPUT CHARACTERISTICS

TQ30

TQ35

TQ31

QEA

(input)

TQ30

TQ35

TQ31

QEB

(input)

TQ36

QEB

Internal

TQ40

TQ41

TABLE 24-31: 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 the “Quadrature Encoder Interface

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

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