DSPIC33FJ64MC508 Microchip Technology Inc., DSPIC33FJ64MC508 Datasheet - Page 306
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DSPIC33FJ64MC508
Manufacturer Part Number
DSPIC33FJ64MC508
Description
High-performance, 16-bit Digital Signal Controllers
Manufacturer
Microchip Technology Inc.
Datasheet
1.DSPIC33FJ64MC508.pdf
(342 pages)
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dsPIC33FJXXXMCX06/X08/X10 MOTOR CONTROL FAMILY
FIGURE 25-13:
TABLE 25-31: QEI INDEX PULSE TIMING REQUIREMENTS
DS70287A-page 304
AC CHARACTERISTICS
TQ50
TQ51
TQ55
Note 1:
Param
No.
2:
QEA
(input)
QEB
(input)
Ungated
Index
Index Internal
Position
Counter Reset
TqIL
TqiH
Tqidxr
Symbol
These parameters are characterized but not tested in manufacturing.
Alignment of index pulses to QEA and QEB is shown for position counter Reset timing only. Shown for
forward direction only (QEA leads QEB). Same timing applies for reverse direction (QEA lags QEB) but
index pulse recognition occurs on falling edge.
Filter Time to Recognize Low,
with Digital Filter
Filter Time to Recognize High,
with Digital Filter
Index Pulse Recognized to Position
Counter Reset (ungated index)
QEI MODULE INDEX PULSE TIMING CHARACTERISTICS
TQ51
Characteristic
(1)
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
Operating temperature
TQ55
3 * N * T
3 * N * T
3 T
Min
CY
CY
CY
TQ50
-40°C ≤ T
Max
—
—
—
A
≤ +85°C
Units
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)
Conditions
—
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