DSPIC30F4012 Microchip Technology Inc., DSPIC30F4012 Datasheet - Page 196

• Manufacturer Part Number: DSPIC30F4012
• Description: Dspic30f4011/4012 Enhanced Flash 16-bit Digital Signal Controller
• Manufacturer: Microchip Technology Inc.

dsPIC30F4011/4012
FIGURE 24-14:
TABLE 24-30: QUADRATURE DECODER TIMING REQUIREMENTS
DS70135E-page 194
AC CHARACTERISTICS
TQ30
TQ31
TQ35
TQ36
TQ40
TQ41
Note 1:
Param
No.
2:
T
T
T
T
T
T
Symbol
QU
QU
QU
QU
QUF
QUF
Internal
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).
(input)
(input)
L
H
IN
P
QEA
QEB
QEB
L
H
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
QEA/QEB INPUT CHARACTERISTICS
Characteristic
TQ36
(1)
TQ31
Confidential
TQ41
Standard Operating Conditions: 2.5V to 5.5V
(unless otherwise stated)
Operating temperature
TQ31
3 * N * T
3 * N * T
TQ35
12 T
Typ
6 T
6 T
3 T
CY
CY
CY
(2)
CY
CY
CY
TQ35
TQ30
Max
—
—
—
—
—
—
TQ40
TQ30
-40°C ≤ T
-40°C ≤ T
Units
ns
ns
ns
ns
ns
ns
© 2007 Microchip Technology Inc.
N = 1, 2, 4, 16, 32, 64, 128
and 256 (Note 2)
N = 1, 2, 4, 16, 32, 64, 128
and 256 (Note 2)
A
A
≤ +85°C for Industrial
≤ +125°C for Extended
Conditions