DSPIC30F3011-20E Datasheet, PDF (187/226 Pages) Microchip Technology – High-Performance, 16-Bit Digital Signal Controllers

dsPIC30F3010/3011
FIGURE 23-14:
QEA/QEB INPUT CHARACTERISTICS
TQ36
QEA
(input)
TQ31
TQ30
TQ35
QEB
(input)
TQ41
TQ40
TQ31
TQ30
TQ35
QEB
Internal
TABLE 23-30: 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
TQ31
TQ35
TQ36
TQ40
TQ41
Note 1:
2:
TQUL Quadrature Input Low Time
6 TCY
—
ns
TQUH Quadrature Input High Time
6 TCY
—
ns
TQUIN Quadrature Input Period
12 TCY
—
ns
TQUP Quadrature Phase Period
3 TCY
—
ns
TQUFL Filter Time to Recognize Low,
with Digital Filter
3 * N * TCY
—
ns N = 1, 2, 4, 16, 32, 64,
128 and 256 (Note 2)
TQUFH Filter Time to Recognize High,
with Digital Filter
3 * N * TCY
—
ns N = 1, 2, 4, 16, 32, 64,
128 and 256 (Note 2)
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)” in the”dsPIC30F Family Reference Manual” (DS70046).
© 2008 Microchip Technology Inc.
DS70141E-page 185