dspic33fj128mc204 Microchip Technology Inc., dspic33fj128mc204 Datasheet - Page 362

• Manufacturer Part Number: dspic33fj128mc204
• Description: High-performance, 16-bit Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

FIGURE 31-12:
TABLE 31-30: QUADRATURE DECODER TIMING REQUIREMENTS
DS70291C-page 360
AC CHARACTERISTICS
TQ30
TQ31
TQ35
TQ36
TQ40
TQ41
Note 1:
Param
No.
2:
3:
These parameters are characterized but not tested in manufacturing.
Data in “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
N = Index Channel Digital Filter Clock Divide Select bits. Refer to Section 15. “Quadrature Encoder
Interface (QEI)” in the “dsPIC33F Family Reference Manual”. Please see the Microchip web site for the
latest dsPIC33F Family Reference Manual sections.
QEA
(input)
QEB
(input)
QEB
Internal
T
T
T
T
T
T
Symbol
QU
QU
QU
QU
QUF
QUF
L
H
IN
P
L
H
QEA/QEB INPUT CHARACTERISTICS
Quadrature Input Low Time
Quadrature Input High Time
Quadrature Input Period
Quadrature Phase Period
Filter Time to Recognize Low,
with Digital Filter
Filter Time to Recognize High,
with Digital Filter
Characteristic
TQ36
TQ31
(1)
TQ41
Preliminary
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
Operating temperature
TQ31
TQ35
3 * N * T
3 * N * T
12 T
Typ
6 T
6 T
3 T
TQ35
CY
CY
CY
TQ30
(2)
CY
CY
CY
TQ40
TQ30
Max
—
—
—
—
—
—
-40°C ≤ T
-40°C ≤ T
Units
ns
ns
ns
ns
ns
ns
© 2009 Microchip Technology Inc.
A
A
≤ +85°C for Industrial
≤ +125°C for Extended
N = 1, 2, 4, 16, 32, 64,
128 and 256 (Note 3)
N = 1, 2, 4, 16, 32, 64,
128 and 256 (Note 3)
Conditions
—
—
—
—