PIC24EP64MC204-E/PT Microchip Technology, PIC24EP64MC204-E/PT Datasheet - Page 422

• Manufacturer Part Number: PIC24EP64MC204-E/PT
• Description: 16 Bit MCU, 64KB Flash, 8KB RAM, 60 MHz, 44 Pin, MCPWM,QEI, 3 OpAmp, 4 Comp, PTG
• Manufacturer: Microchip Technology

dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X, AND PIC24EPXXXGP/MC20X
FIGURE 30-13:
TABLE 30-31: QEI INDEX PULSE TIMING REQUIREMENTS
DS70657F-page 422
AC CHARACTERISTICS
TQ50
TQ51
TQ55
Note 1:
Param
No.
2:
QEA
(input)
QEB
(input)
Ungated
Index
Index Internal
Position Coun-
ter 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.
(dsPIC33EPXXXMC20X/50X and PIC24EPXXXMC20X DEVICES ONLY)
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
(dsPIC33EPXXXMC20X/50X and PIC24EPXXXMC20X DEVICES ONLY)
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
-40°C  T
Max.
—
—
—
 2011-2012 Microchip Technology Inc.
A
A
 +85°C for Industrial
 +125°C for Extended
Units
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)
Conditions
—