DSPIC33FJ64GS406 Microchip Technology Inc., DSPIC33FJ64GS406 Datasheet - Page 387

• Manufacturer Part Number: DSPIC33FJ64GS406
• Description: High-performance, 16-bit Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

TABLE 27-42: QEI INDEX PULSE TIMING REQUIREMENTS
FIGURE 27-22:
TABLE 27-43: QEI MODULE EXTERNAL CLOCK TIMING REQUIREMENTS
 2010 Microchip Technology Inc.
AC CHARACTERISTICS
TQ50
TQ51
TQ55
Note 1:
AC CHARACTERISTICS
TQ10
TQ11
TQ15
TQ20
Note 1:
Param
Param
dsPIC33FJ32GS406/606/608/610 and dsPIC33FJ64GS406/606/608/610
No.
No.
2:
TtQH
TtQL
TtQP
T
TqIL
TqiH
Tqidxr
POSCNT
QEB
Symbol
CKEXTMRL
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.
These parameters are characterized but not tested in manufacturing.
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)
TIMERQ (QEI MODULE) EXTERNAL CLOCK TIMING CHARACTERISTICS
TQCK High Time
TQCK Low Time
TQCP Input
Period
Delay from External TxCK Clock
Edge to Timer Increment
Characteristic
Characteristic
Synchronous,
with prescaler
with prescaler
Synchronous,
with prescaler
Synchronous,
TQ10
(1)
(1)
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
Operating temperature
Preliminary
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
Operating temperature
TQ15
2 * T
T
T
3 * N * T
3 * N * T
0.5 T
CY
CY
Min
CY
3 T
Min
+ 20
+ 20
CY
+ 40
CY
TQ11
CY
CY
-40°C  T
-40°C  T
Typ
—
—
—
—
Max
—
—
—
-40°C  T
-40°C  T
1.5 T
A
A
Max
 +125°C for Extended
—
—
—
 +85°C for Industrial
Units
ns
ns
ns
CY
A
A
TQ20
 +125°C for Extended
 +85°C for Industrial
Units
N = 1, 2, 4, 16, 32, 64,
128 and 256 (Note 2)
N = 1, 2, 4, 16, 32, 64,
128 and 256 (Note 2)
ns
ns
ns
—
Must also meet
parameter TQ15
Must also meet
parameter TQ15
DS70591C-page 387
Conditions
Conditions
—
—
—