Microchip Technology DM330023-2 Data Sheet
dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304
DS70283K-page 256
© 2007-2012 Microchip Technology Inc.
FIGURE 24-12:
QEA/QEB INPUT CHARACTERISTICS
TQ30
TQ35
TQ31
QEA
(input)
(input)
TQ30
TQ35
TQ31
QEB
(input)
(input)
TQ36
QEB
Internal
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
(unless otherwise stated)
Operating temperature
-40°C
≤ T
A
≤ +85°C for Industrial
-40°C
≤ T
A
≤ +125°C for Extended
Param
No.
Symbol
Characteristic
(1)
Typ
(2)
Max
Units
Conditions
TQ30
T
QU
L
Quadrature Input Low Time
6 T
CY
—
ns
—
TQ31
T
QU
H
Quadrature Input High Time
6 T
CY
—
ns
—
TQ35
T
QU
IN
Quadrature Input Period
12 T
CY
—
ns
—
TQ36
T
QU
P
Quadrature Phase Period
3 T
CY
—
ns
—
TQ40
T
QUF
L
Filter Time to Recognize Low,
with Digital Filter
with Digital Filter
3 * N * T
CY
—
ns
N = 1, 2, 4, 16, 32, 64,
128 and 256 (Note 3)
128 and 256 (Note 3)
TQ41
T
QUF
H
Filter Time to Recognize High,
with Digital Filter
with Digital Filter
3 * N * T
CY
—
ns
N = 1, 2, 4, 16, 32, 64,
128 and 256 (Note 3)
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.
Microchip web site for the latest dsPIC33F/PIC24H Family Reference Manual sections.