Microchip Technology MA330025-1 Data Sheet
dsPIC33EPXXX(GP/MC/MU)806/810/814 and PIC24EPXXX(GP/GU)810/814
DS70616G-page 524
2009-2012 Microchip Technology Inc.
FIGURE 32-13:
QEA/QEB INPUT CHARACTERISTICS
(dsPIC33EPXXX(MC/MU)806/810/814 DEVICES ONLY)
(dsPIC33EPXXX(MC/MU)806/810/814 DEVICES ONLY)
TQ30
TQ35
QEA
(input)
(input)
TQ35
QEB
(input)
(input)
TQ36
QEB
Internal
Internal
TQ40
TQ41
TQ31
TQ31
TQ30
TABLE 32-31: QUADRATURE DECODER TIMING REQUIREMENTS
(dsPIC33EPXXX(MC/MU)806/810/814 DEVICES ONLY)
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.
Symbol
Characteristic
Typ.
(
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
128 and 256 (Note
)
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
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)” (DS70601) in the “dsPIC33E/PIC24E Family Reference Manual”. Please see the
Microchip web site for the latest family reference manual sections.
Microchip web site for the latest family reference manual sections.