DSPIC30F2010 MICROCHIP [Microchip Technology], DSPIC30F2010 Datasheet - Page 172

• Manufacturer Part Number: DSPIC30F2010
• Description: High-Performance, 16-Bit Digital Signal Controllers
• Manufacturer: MICROCHIP [Microchip Technology]

dsPIC30F2010
FIGURE 22-15:
TABLE 22-31: QEI INDEX PULSE TIMING REQUIREMENTS
DS70118G-page 170
AC CHARACTERISTICS
TQ50
TQ51
TQ55
Note 1:
Param
No.
2:
Position
Ungated
Index
Index Internal
QEB
(input)
QEA
(input)
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 High,
Filter Time to Recognize Low,
with Digital Filter
with Digital Filter
Index Pulse Recognized to Position
Counter Reset (Ungated Index)
QEI MODULE INDEX PULSE TIMING CHARACTERISTICS
TQ51
Characteristic
(1)
Standard Operating Conditions: 2.5V to 5.5V
(unless otherwise stated)
Operating temperature
TQ55
3 * N * T
3 * N * T
3 T
Min
CY
CY
CY
TQ50
-40°C
-40°C T
Max
—
—
—
T
A
A
Units
+85°C for Industrial
+125°C for Extended
ns
ns
ns
© 2006 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
—