DSPIC30F5016 Microchip Technology Inc., DSPIC30F5016 Datasheet - Page 199

• Manufacturer Part Number: DSPIC30F5016
• Description: Dspic30f5015/5016 Enhanced Flash 16-bit Digital Signal Controller
• Manufacturer: Microchip Technology Inc.

FIGURE 24-15:
TABLE 24-32: QEI INDEX PULSE TIMING REQUIREMENTS
© 2007 Microchip Technology Inc.
AC CHARACTERISTICS
TQ50
TQ51
TQ55
Note 1:
Param
No.
2:
Position
Ungated
Index
Index Internal
QEA
(input)
QEB
(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 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: 2.5V to 5.5V
(unless otherwise stated)
Operating temperature
TQ55
3 * N * T
3 * N * T
3 T
Min
dsPIC30F5015/5016
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
N = 1, 2, 4, 16, 32, 64,
128 and 256 (Note 2)
N = 1, 2, 4, 16, 32, 64,
128 and 256 (Note 2)
DS70149C-page 197
Conditions
—