Datasheet

 2009-2012 Microchip Technology Inc. DS70593D-page 289
dsPIC33FJXXXGPX06A/X08A/X10A
TABLE 25-23: TIMER2, TIMER4, TIMER6 AND TIMER8 EXTERNAL CLOCK TIMING
REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  T
A  +125°C for Extended
Param
No.
Symbol Characteristic
(1)
Min Typ Max Units Conditions
TB10 TtxH TxCK High
Time
Synchronous
mode
Greater of
20 or
(T
CY + 20)/N
— — ns Must also meet
parameter TB15
N = prescale
value
(1, 8, 64, 256)
TB11 TtxL TxCK Low
Time
Synchronous
mode
Greater of:
20 or
(T
CY + 20)/N
——ns
Must also meet
parameter TB15
N = prescale
value
(1, 8, 64, 256)
TB15 TtxP TxCK Input
Period
Synchronous
mode
Greater of:
40 or
(2 T
CY + 40)/N
— — ns N = prescale
value
(1, 8, 64, 256)
TB20 TCKEXTMRL Delay from External TxCK
Clock Edge to Timer Incre-
ment
0.75 TCY + 40 — 1.75 TCY + 40 ns —
Note 1: These parameters are characterized, but are not tested in manufacturing.
TABLE 25-24: TIMER3, TIMER5, TIMER7 AND TIMER9 EXTERNAL CLOCK TIMING
REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  T
A  +125°C for Extended
Param
No.
Symbol Characteristic
(1)
Min Typ Max Units Conditions
TC10 TtxH TxCK High
Time
Synchronous T
CY + 20 — — ns Must also meet
parameter TC15
TC11 TtxL TxCK Low
Time
Synchronous T
CY + 20 — — ns Must also meet
parameter TC15
TC15 TtxP TxCK Input
Period
Synchronous,
with prescaler
2T
CY + 40 — — ns N = prescale
value
(1, 8, 64, 256)
TC20 T
CKEXTMRL Delay from External TxCK
Clock Edge to Timer Incre-
ment
0.75 T
CY + 40 — 1.75 TCY + 40 ns —
Note 1: These parameters are characterized, but are not tested in manufacturing.